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2013-11-14PM / Runtime: Fix error path for prepareUlf Hansson
If a device prepare callback for some reason would fail, the PM core prevented the device from going inactive forever. In this case, to reverse the pm_runtime_get_noresume() we invokes the asyncronous pm_runtime_put(), thus restoring the usage count. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-11-14Merge branch 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-armLinus Torvalds
Pull DMA mask updates from Russell King: "This series cleans up the handling of DMA masks in a lot of drivers, fixing some bugs as we go. Some of the more serious errors include: - drivers which only set their coherent DMA mask if the attempt to set the streaming mask fails. - drivers which test for a NULL dma mask pointer, and then set the dma mask pointer to a location in their module .data section - which will cause problems if the module is reloaded. To counter these, I have introduced two helper functions: - dma_set_mask_and_coherent() takes care of setting both the streaming and coherent masks at the same time, with the correct error handling as specified by the API. - dma_coerce_mask_and_coherent() which resolves the problem of drivers forcefully setting DMA masks. This is more a marker for future work to further clean these locations up - the code which creates the devices really should be initialising these, but to fix that in one go along with this change could potentially be very disruptive. The last thing this series does is prise away some of Linux's addition to "DMA addresses are physical addresses and RAM always starts at zero". We have ARM LPAE systems where all system memory is above 4GB physical, hence having DMA masks interpreted by (eg) the block layers as describing physical addresses in the range 0..DMAMASK fails on these platforms. Santosh Shilimkar addresses this in this series; the patches were copied to the appropriate people multiple times but were ignored. Fixing this also gets rid of some ARM weirdness in the setup of the max*pfn variables, and brings ARM into line with every other Linux architecture as far as those go" * 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-arm: (52 commits) ARM: 7805/1: mm: change max*pfn to include the physical offset of memory ARM: 7797/1: mmc: Use dma_max_pfn(dev) helper for bounce_limit calculations ARM: 7796/1: scsi: Use dma_max_pfn(dev) helper for bounce_limit calculations ARM: 7795/1: mm: dma-mapping: Add dma_max_pfn(dev) helper function ARM: 7794/1: block: Rename parameter dma_mask to max_addr for blk_queue_bounce_limit() ARM: DMA-API: better handing of DMA masks for coherent allocations ARM: 7857/1: dma: imx-sdma: setup dma mask DMA-API: firmware/google/gsmi.c: avoid direct access to DMA masks DMA-API: dcdbas: update DMA mask handing DMA-API: dma: edma.c: no need to explicitly initialize DMA masks DMA-API: usb: musb: use platform_device_register_full() to avoid directly messing with dma masks DMA-API: crypto: remove last references to 'static struct device *dev' DMA-API: crypto: fix ixp4xx crypto platform device support DMA-API: others: use dma_set_coherent_mask() DMA-API: staging: use dma_set_coherent_mask() DMA-API: usb: use new dma_coerce_mask_and_coherent() DMA-API: usb: use dma_set_coherent_mask() DMA-API: parport: parport_pc.c: use dma_coerce_mask_and_coherent() DMA-API: net: octeon: use dma_coerce_mask_and_coherent() DMA-API: net: nxp/lpc_eth: use dma_coerce_mask_and_coherent() ...
2013-11-13target: Fix delayed Task Aborted Status (TAS) handling bugNicholas Bellinger
This patch fixes a bug in delayed Task Aborted Status (TAS) handling, where transport_send_task_abort() was not returning for the case when the se_tfo->write_pending() callback indicated that last fabric specific WRITE PDU had not yet been received. It also adds an explicit cmd->scsi_status = SAM_STAT_TASK_ABORTED assignment within transport_check_aborted_status() to avoid the case where se_tfo->queue_status() is called when the SAM_STAT_TASK_ABORTED assignment + ->queue_status() in transport_send_task_abort() does not occur once SCF_SENT_DELAYED_TAS has been set. Cc: <stable@vger.kernel.org> #3.2+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-11-13iscsi-target: Reject unsupported multi PDU text command sequenceNicholas Bellinger
This patch adds a check to reject text commands with F_BIT=0 || C_BIT=1, as multi PDU text command sequences are currently unsupported. This avoids the case where a text command received with F_BIT=0, was generating a text response with F_BIT=1 which is a protocol error according to RFC-3720 Section 10.11.1. Reported-by: Arshad Hussain <arshad.hussain@calsoftinc.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-11-13netfilter: fix connlimit Kconfig prompt stringRandy Dunlap
Under Core Netfilter Configuration, connlimit match support has an extra double quote at the end of it. Fixes a portion of kernel bugzilla #52671: https://bugzilla.kernel.org/show_bug.cgi?id=52671 Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: lailavrazda1979@gmail.com Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-11-13nfsd4: improve write performance with better sendspace reservationsJ. Bruce Fields
Currently the rpc code conservatively refuses to accept rpc's from a client if the sum of its worst-case estimates of the replies it owes that client exceed the send buffer space. Unfortunately our estimate of the worst-case reply for an NFSv4 compound is always the maximum read size. This can unnecessarily limit the number of operations we handle concurrently, for example in the case most operations are writes (which have small replies). We can do a little better if we check which ops the compound contains. This is still a rough estimate, we'll need to improve on it some day. Reported-by: Shyam Kaushik <shyamnfs1@gmail.com> Tested-by: Shyam Kaushik <shyamnfs1@gmail.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-11-13sparc64: Encode huge PMDs using PTE encoding.David S. Miller
Now that we have 64-bits for PMDs we can stop using special encodings for the huge PMD values, and just put real PTEs in there. We allocate a _PAGE_PMD_HUGE bit to distinguish between plain PMDs and huge ones. It is the same for both 4U and 4V PTE layouts. We also use _PAGE_SPECIAL to indicate the splitting state, since a huge PMD cannot also be special. All of the PMD --> PTE translation code disappears, and most of the huge PMD bit modifications and tests just degenerate into the PTE operations. In particular USER_PGTABLE_CHECK_PMD_HUGE becomes trivial. As a side effect, normal PMDs don't shift the physical address around. This also speeds up the page table walks in the TLB miss paths since they don't have to do the shifts any more. Another non-trivial aspect is that pte_modify() has to be changed to preserve the _PAGE_PMD_HUGE bits as well as the page size field of the pte. Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-13svcrpc: remove an unnecessary assignmentWeng Meiling
Signed-off-by: Weng Meiling <wengmeiling.weng@huawei.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-11-13dmatest: make driver unmap also source buffers by itselfBartlomiej Zolnierkiewicz
Make the driver DMA unmap also source buffers by itself (currently it DMA unmaps only destination buffers) as a preparation for introducing generic 'ummap' data. Cc: Dan Williams <dan.j.williams@intel.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Tomasz Figa <t.figa@samsung.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2013-11-13preempt: Make PREEMPT_ACTIVE genericThomas Gleixner
No point in having this bit defined by architecture. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20130917183629.090698799@linutronix.de
2013-11-13sparc: Use preempt_schedule_irqThomas Gleixner
The low level preemption code fiddles with the PREEMPT_ACTIVE bit for no reason and calls schedule() with interrupts disabled, which is wrong to begin with. Remove the PREEMPT_ACTIVE fiddling and call the proper schedule_preempt_irq() function. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: David S. Miller <davem@davemloft.net> Cc: sparclinux@vger.kernel.org Link: http://lkml.kernel.org/r/20130917183628.966769884@linutronix.de
2013-11-13ia64: Use preempt_schedule_irqThomas Gleixner
Use the proper core function instead of fiddling with PREEMPT_ACTIVE and enable/disable interrupts in the low level code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: linux-ia64@vger.kernel.org Link: http://lkml.kernel.org/r/20130917183628.857145384@linutronix.de
2013-11-13m32r: Use preempt_schedule_irqThomas Gleixner
Use the proper core function instead of fiddling with preempt_active and interrupt enable in the low level code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: linux-m32r-ja@ml.linux-m32r.org Link: http://lkml.kernel.org/r/20130917183628.758421136@linutronix.de
2013-11-13hardirq: Make hardirq bits genericThomas Gleixner
There is no reason for per arch hardirq bits. Make them all generic Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20130917183628.534494408@linutronix.de
2013-11-13m68k: Simplify low level interrupt handling codeThomas Gleixner
The low level interrupt entry code of m68k contains the following: add_preempt_count(HARDIRQ_OFFSET); do_IRQ(); irq_enter(); add_preempt_count(HARDIRQ_OFFSET); handle_interrupt(); irq_exit(); sub_preempt_count(HARDIRQ_OFFSET); if (in_interrupt()) return; <---- On m68k always taken! if (local_softirq_pending()) do_softirq(); sub_preempt_count(HARDIRQ_OFFSET); if (in_hardirq()) return; if (status_on_stack_has_interrupt_priority_mask > 0) return; if (local_softirq_pending()) do_softirq(); ret_from_exception: if (interrupted_context_is_kernel) return: .... I tried to find a proper explanation for this, but the changelog is sparse and there are no mails explaining it further. But obviously this relates to the interrupt priority levels of the m68k and tries to be extra clever with nested interrupts. Though this cleverness just adds code bloat to the interrupt hotpath. For the common case of non nested interrupts the code runs through two extra conditionals to the only important one, which checks whether the return is to kernel or user space. For the nested case the checks for in_hardirq() and the priority mask value on stack catch only the case where the nested interrupt happens inside the hard irq context of the first interrupt. If the nested interrupt happens while the first interrupt handles soft interrupts, then these extra checks buy nothing. The nested interrupt will fall through to the final kernel/user space return check at ret_from_exception. Changing the code flow in the following way: do_IRQ(); irq_enter(); add_preempt_count(HARDIRQ_OFFSET); handle_interrupt(); irq_exit(); sub_preempt_count(HARDIRQ_OFFSET); if (in_interrupt()) return; if (local_softirq_pending()) do_softirq(); ret_from_exception: if (interrupted_context_is_kernel) return: makes the region protected by the hardirq count slightly smaller and the softirq handling is invoked with a minimal deeper stack. But otherwise it's completely functional equivalent and saves 104 bytes of text in arch/m68k/kernel/entry.o. This modification allows us further to get rid of the limitations which m68k puts on the preempt_count layout, so we can make the preempt count bits completely generic. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Michael Schmitz <schmitz@biophys.uni-duesseldorf.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Linux/m68k <linux-m68k@vger.kernel.org> Cc: Andreas Schwab <schwab@linux-m68k.org> Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1311112052360.30673@ionos.tec.linutronix.de
2013-11-13kvm, vmx: Fix lazy FPU on nested guestAnthoine Bourgeois
If a nested guest does a NM fault but its CR0 doesn't contain the TS flag (because it was already cleared by the guest with L1 aid) then we have to activate FPU ourselves in L0 and then continue to L2. If TS flag is set then we fallback on the previous behavior, forward the fault to L1 if it asked for. Signed-off-by: Anthoine Bourgeois <bourgeois@bertin.fr> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-11-13KEYS: Fix error handling in big_key instantiationDavid Howells
In the big_key_instantiate() function we return 0 if kernel_write() returns us an error rather than returning an error. This can potentially lead to dentry_open() giving a BUG when called from big_key_read() with an unset tmpfile path. ------------[ cut here ]------------ kernel BUG at fs/open.c:798! ... RIP: 0010:[<ffffffff8119bbd1>] dentry_open+0xd1/0xe0 ... Call Trace: [<ffffffff812350c5>] big_key_read+0x55/0x100 [<ffffffff81231084>] keyctl_read_key+0xb4/0xe0 [<ffffffff81231e58>] SyS_keyctl+0xf8/0x1d0 [<ffffffff815bb799>] system_call_fastpath+0x16/0x1b Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Stephen Gallagher <sgallagh@redhat.com>
2013-11-13ASoC: blackfin: Fix missing breakTakashi Iwai
Fixes: 4b2ffc205cb9 ('ASoC: Blackfin I2S: add 8-bit sample support') Reported-by: David Binderman Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Mark Brown <broonie@linaro.org> Cc: stable@vger.kernel.org
2013-11-13ALSA: usb-audio: add front jack channel selector for EMU0204Vasily Khoruzhick
Add support for front jack channel selector which is present on EMU0204. It allows to get 4 channels out of this soundcard. Tested-by: Yury Bushmelev <jay@jay-tech.ru> Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-11-13ALSA: hda - Don't clear the power state at snd_hda_codec_reset()Takashi Iwai
snd_hda_codec_reset() is called either in resetting the whole setup at error paths or hwdep clear/reconfig sysfs triggers. But all of these don't assume that the power has to be off, rather they want to keep the power state unchanged (e.g. reconfig_codec() calls the power up/down by itself). Thus, unconditionally clearing the power state in snd_hda_codec_reset() leads to the inconsistency, confuses the further operation. This patch gets rid of the lines doing that bad thing. Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-11-13genirq: Prevent spurious detection for unconditionally polled interruptsThomas Gleixner
On a 68k platform a couple of interrupts are demultiplexed and "polled" from a top level interrupt. Unfortunately there is no way to determine which of the sub interrupts raised the top level interrupt, so all of the demultiplexed interrupt handlers need to be invoked. Given a high enough frequency this can trigger the spurious interrupt detection mechanism, if one of the demultiplex interrupts returns IRQ_NONE continuously. But this is a false positive as the polling causes this behaviour and not buggy hardware/software. Introduce IRQ_POLLED which can be set at interrupt chip setup time via irq_set_status_flags(). The flag excludes the interrupt from the spurious detector and from all core polling activities. Reported-and-tested-by: Michael Schmitz <schmitzmic@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: linux-m68k@vger.kernel.org Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1311061149250.23353@ionos.tec.linutronix.de
2013-11-13kallsyms: Revert back to 128 max symbol lengthMichal Marek
This reverts commits f3462aa (Kbuild: Handle longer symbols in kallsyms.c) and eea0e9c (kbuild: Increase kallsyms max symbol length) except for the added overflow check. The reason is a regression caused by increasing the buffer: http://marc.info/?l=linux-kernel&m=138387700415675. Reported-by: Fengguang Wu <fengguang.wu@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Joe Mario <jmario@redhat.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2013-11-13Bluetooth: Fix rejecting SMP security request in slave roleJohan Hedberg
The SMP security request is for a slave role device to request the master role device to initiate a pairing request. If we receive this command while we're in the slave role we should reject it appropriately. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-11-13Bluetooth: Fix crash in l2cap_chan_send after l2cap_chan_delSeung-Woo Kim
Removing a bond and disconnecting from a specific remote device can cause l2cap_chan_send() is called after l2cap_chan_del() is called. This causes following crash. [ 1384.972086] Unable to handle kernel NULL pointer dereference at virtual address 00000008 [ 1384.972090] pgd = c0004000 [ 1384.972125] [00000008] *pgd=00000000 [ 1384.972137] Internal error: Oops: 17 [#1] PREEMPT SMP ARM [ 1384.972144] Modules linked in: [ 1384.972156] CPU: 0 PID: 841 Comm: krfcommd Not tainted 3.10.14-gdf22a71-dirty #435 [ 1384.972162] task: df29a100 ti: df178000 task.ti: df178000 [ 1384.972182] PC is at l2cap_create_basic_pdu+0x30/0x1ac [ 1384.972191] LR is at l2cap_chan_send+0x100/0x1d4 [ 1384.972198] pc : [<c051d250>] lr : [<c0521c78>] psr: 40000113 [ 1384.972198] sp : df179d40 ip : c083a010 fp : 00000008 [ 1384.972202] r10: 00000004 r9 : 0000065a r8 : 000003f5 [ 1384.972206] r7 : 00000000 r6 : 00000000 r5 : df179e84 r4 : da557000 [ 1384.972210] r3 : 00000000 r2 : 00000004 r1 : df179e84 r0 : 00000000 [ 1384.972215] Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel [ 1384.972220] Control: 10c53c7d Table: 5c8b004a DAC: 00000015 [ 1384.972224] Process krfcommd (pid: 841, stack limit = 0xdf178238) [ 1384.972229] Stack: (0xdf179d40 to 0xdf17a000) [ 1384.972238] 9d40: 00000000 da557000 00000004 df179e84 00000004 000003f5 0000065a 00000000 [ 1384.972245] 9d60: 00000008 c0521c78 df179e84 da557000 00000004 da557204 de0c6800 df179e84 [ 1384.972253] 9d80: da557000 00000004 da557204 c0526b7c 00000004 df724000 df179e84 00000004 [ 1384.972260] 9da0: df179db0 df29a100 c083bc48 c045481c 00000001 00000000 00000000 00000000 [ 1384.972267] 9dc0: 00000000 df29a100 00000000 00000000 00000000 00000000 df179e10 00000000 [ 1384.972274] 9de0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 1384.972281] 9e00: 00000000 00000000 00000000 00000000 df179e4c c000ec80 c0b538c0 00000004 [ 1384.972288] 9e20: df724000 df178000 00000000 df179e84 c0b538c0 00000000 df178000 c07f4570 [ 1384.972295] 9e40: dcad9c00 df179e74 c07f4394 df179e60 df178000 00000000 df179e84 de247010 [ 1384.972303] 9e60: 00000043 c0454dec 00000001 00000004 df315c00 c0530598 00000004 df315c0c [ 1384.972310] 9e80: ffffc32c 00000000 00000000 df179ea0 00000001 00000000 00000000 00000000 [ 1384.972317] 9ea0: df179ebc 00000004 df315c00 c05df838 00000000 c0530810 c07d08c0 d7017303 [ 1384.972325] 9ec0: 6ec245b9 00000000 df315c00 c0531b04 c07f3fe0 c07f4018 da67a300 df315c00 [ 1384.972332] 9ee0: 00000000 c05334e0 df315c00 df315b80 df315c00 de0c6800 da67a300 00000000 [ 1384.972339] 9f00: de0c684c c0533674 df204100 df315c00 df315c00 df204100 df315c00 c082b138 [ 1384.972347] 9f20: c053385c c0533754 a0000113 df178000 00000001 c083bc48 00000000 c053385c [ 1384.972354] 9f40: 00000000 00000000 00000000 c05338c4 00000000 df9f0000 df9f5ee4 df179f6c [ 1384.972360] 9f60: df178000 c0049db4 00000000 00000000 c07f3ff8 00000000 00000000 00000000 [ 1384.972368] 9f80: df179f80 df179f80 00000000 00000000 df179f90 df179f90 df9f5ee4 c0049cfc [ 1384.972374] 9fa0: 00000000 00000000 00000000 c000f168 00000000 00000000 00000000 00000000 [ 1384.972381] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 1384.972388] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00010000 00000600 [ 1384.972411] [<c051d250>] (l2cap_create_basic_pdu+0x30/0x1ac) from [<c0521c78>] (l2cap_chan_send+0x100/0x1d4) [ 1384.972425] [<c0521c78>] (l2cap_chan_send+0x100/0x1d4) from [<c0526b7c>] (l2cap_sock_sendmsg+0xa8/0x104) [ 1384.972440] [<c0526b7c>] (l2cap_sock_sendmsg+0xa8/0x104) from [<c045481c>] (sock_sendmsg+0xac/0xcc) [ 1384.972453] [<c045481c>] (sock_sendmsg+0xac/0xcc) from [<c0454dec>] (kernel_sendmsg+0x2c/0x34) [ 1384.972469] [<c0454dec>] (kernel_sendmsg+0x2c/0x34) from [<c0530598>] (rfcomm_send_frame+0x58/0x7c) [ 1384.972481] [<c0530598>] (rfcomm_send_frame+0x58/0x7c) from [<c0530810>] (rfcomm_send_ua+0x98/0xbc) [ 1384.972494] [<c0530810>] (rfcomm_send_ua+0x98/0xbc) from [<c0531b04>] (rfcomm_recv_disc+0xac/0x100) [ 1384.972506] [<c0531b04>] (rfcomm_recv_disc+0xac/0x100) from [<c05334e0>] (rfcomm_recv_frame+0x144/0x264) [ 1384.972519] [<c05334e0>] (rfcomm_recv_frame+0x144/0x264) from [<c0533674>] (rfcomm_process_rx+0x74/0xfc) [ 1384.972531] [<c0533674>] (rfcomm_process_rx+0x74/0xfc) from [<c0533754>] (rfcomm_process_sessions+0x58/0x160) [ 1384.972543] [<c0533754>] (rfcomm_process_sessions+0x58/0x160) from [<c05338c4>] (rfcomm_run+0x68/0x110) [ 1384.972558] [<c05338c4>] (rfcomm_run+0x68/0x110) from [<c0049db4>] (kthread+0xb8/0xbc) [ 1384.972576] [<c0049db4>] (kthread+0xb8/0xbc) from [<c000f168>] (ret_from_fork+0x14/0x2c) [ 1384.972586] Code: e3100004 e1a07003 e5946000 1a000057 (e5969008) [ 1384.972614] ---[ end trace 6170b7ce00144e8c ]--- Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-11-13Bluetooth: Fix to set proper bdaddr_type for RFCOMM connectSeung-Woo Kim
L2CAP socket validates proper bdaddr_type for connect, so this patch fixes to set explictly bdaddr_type for RFCOMM connect. Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-11-13Bluetooth: Fix RFCOMM bind fail for L2CAP sockSeung-Woo Kim
L2CAP socket bind checks its bdaddr type but RFCOMM kernel thread does not assign proper bdaddr type for L2CAP sock. This can cause that RFCOMM failure. Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-11-13Bluetooth: Fix issue with RFCOMM getsockopt operationMarcel Holtmann
The commit 94a86df01082557e2de45865e538d7fb6c46231c seem to have uncovered a long standing bug that did not trigger so far. BUG: unable to handle kernel paging request at 00000009dd503502 IP: [<ffffffff815b1868>] rfcomm_sock_getsockopt+0x128/0x200 PGD 0 Oops: 0000 [#1] SMP Modules linked in: ath5k ath mac80211 cfg80211 CPU: 2 PID: 1459 Comm: bluetoothd Not tainted 3.11.0-133163-gcebd830 #2 Hardware name: System manufacturer System Product Name/P6T DELUXE V2, BIOS 1202 12/22/2010 task: ffff8803304106a0 ti: ffff88033046a000 task.ti: ffff88033046a000 RIP: 0010:[<ffffffff815b1868>] [<ffffffff815b1868>] rfcomm_sock_getsockopt+0x128/0x200 RSP: 0018:ffff88033046bed8 EFLAGS: 00010246 RAX: 00000009dd503502 RBX: 0000000000000003 RCX: 00007fffa2ed5548 RDX: 0000000000000003 RSI: 0000000000000012 RDI: ffff88032fd37480 RBP: ffff88033046bf28 R08: 00007fffa2ed554c R09: ffff88032f5707d8 R10: 00007fffa2ed5548 R11: 0000000000000202 R12: ffff880330bbd000 R13: 00007fffa2ed5548 R14: 0000000000000003 R15: 00007fffa2ed554c FS: 00007fc44cfac700(0000) GS:ffff88033fc80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000009dd503502 CR3: 00000003304c2000 CR4: 00000000000007e0 Stack: ffff88033046bf28 ffffffff815b0f2f ffff88033046bf18 0002ffff81105ef6 0000000600000000 ffff88032fd37480 0000000000000012 00007fffa2ed5548 0000000000000003 00007fffa2ed554c ffff88033046bf78 ffffffff814c0380 Call Trace: [<ffffffff815b0f2f>] ? rfcomm_sock_setsockopt+0x5f/0x190 [<ffffffff814c0380>] SyS_getsockopt+0x60/0xb0 [<ffffffff815e0852>] system_call_fastpath+0x16/0x1b Code: 02 00 00 00 0f 47 d0 4c 89 ef e8 74 13 cd ff 83 f8 01 19 c9 f7 d1 83 e1 f2 e9 4b ff ff ff 0f 1f 44 00 00 49 8b 84 24 70 02 00 00 <4c> 8b 30 4c 89 c0 e8 2d 19 cd ff 85 c0 49 89 d7 b9 f2 ff ff ff RIP [<ffffffff815b1868>] rfcomm_sock_getsockopt+0x128/0x200 RSP <ffff88033046bed8> CR2: 00000009dd503502 It triggers in the following segment of the code: 0x1313 is in rfcomm_sock_getsockopt (net/bluetooth/rfcomm/sock.c:743). 738 739 static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) 740 { 741 struct sock *sk = sock->sk; 742 struct rfcomm_conninfo cinfo; 743 struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; 744 int len, err = 0; 745 u32 opt; 746 747 BT_DBG("sk %p", sk); The l2cap_pi(sk) is wrong here since it should have been rfcomm_pi(sk), but that socket of course does not contain the low-level connection details requested here. Tracking down the actual offending commit, it seems that this has been introduced when doing some L2CAP refactoring: commit 8c1d787be4b62d2d1b6f04953eca4bcf7c839d44 Author: Gustavo F. Padovan <padovan@profusion.mobi> Date: Wed Apr 13 20:23:55 2011 -0300 @@ -743,6 +743,7 @@ static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __u struct sock *sk = sock->sk; struct sock *l2cap_sk; struct rfcomm_conninfo cinfo; + struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; int len, err = 0; u32 opt; @@ -787,8 +788,8 @@ static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __u l2cap_sk = rfcomm_pi(sk)->dlc->session->sock->sk; - cinfo.hci_handle = l2cap_pi(l2cap_sk)->conn->hcon->handle; - memcpy(cinfo.dev_class, l2cap_pi(l2cap_sk)->conn->hcon->dev_class, 3); + cinfo.hci_handle = conn->hcon->handle; + memcpy(cinfo.dev_class, conn->hcon->dev_class, 3); The l2cap_sk got accidentally mixed into the sk (which is RFCOMM) and now causing a problem within getsocketopt() system call. To fix this, just re-introduce l2cap_sk and make sure the right socket is used for the low-level connection details. Reported-by: Fabio Rossi <rossi.f@inwind.it> Reported-by: Janusz Dziedzic <janusz.dziedzic@gmail.com> Tested-by: Janusz Dziedzic <janusz.dziedzic@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-11-13ASoC: arizona: Fix typo in name of EQ coefficient controlsRichard Fitzgerald
Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-11-13dma: pl330: silence a compile warningDan Carpenter
On 64 bit systems GCC warns that: drivers/dma/pl330.c: In function ‘pl330_filter’: drivers/dma/pl330.c:2317:21: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] It's harmless and I have casted it away. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13dma: pl330: off by one in pl330_probe()Dan Carpenter
There are only AMBA_NR_IRQS (2) elements in adev->irq[]. This code maybe works if the there is a zero directly after the array. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13qib_fs: fix (some) dcache abusesAl Viro
* lookup_one_len() really wants i_mutex held on directory. * leaks galore - just mount ipathfs, then cd /sys/bus/pci/drivers/qib_ib; echo *:*:*.* >unbind on a box with that card present and try to umount ipathfs... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-11-13block: Use u64_stats_init() to initialize seqcountsPeter Zijlstra
Now that seqcounts are lockdep enabled objects, we need to explicitly initialize runtime allocated seqcounts so that lockdep can track them. Without this patch, Fengguang was seeing: [ 4.127282] INFO: trying to register non-static key. [ 4.128027] the code is fine but needs lockdep annotation. [ 4.128027] turning off the locking correctness validator. [ 4.128027] CPU: 0 PID: 96 Comm: kworker/u4:1 Not tainted 3.12.0-next-20131108-10601-gbad570d #2 [ 4.128027] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ ... ] [ 4.128027] Call Trace: [ 4.128027] [<7908e744>] ? console_unlock+0x353/0x380 [ 4.128027] [<79dc7cf2>] dump_stack+0x48/0x60 [ 4.128027] [<7908953e>] __lock_acquire.isra.26+0x7e3/0xceb [ 4.128027] [<7908a1c5>] lock_acquire+0x71/0x9a [ 4.128027] [<794079aa>] ? blk_throtl_bio+0x1c3/0x485 [ 4.128027] [<7940658b>] throtl_update_dispatch_stats+0x7c/0x153 [ 4.128027] [<794079aa>] ? blk_throtl_bio+0x1c3/0x485 [ 4.128027] [<794079aa>] blk_throtl_bio+0x1c3/0x485 ... Use u64_stats_init() for all affected data structures, which initializes the seqcount. Reported-and-Tested-by: Fengguang Wu <fengguang.wu@intel.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Peter Zijlstra <peterz@infradead.org> [ Folded in another fix from the mailing list as well as a fix to that fix. Tweaked commit message. ] Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1384314134-6895-1-git-send-email-john.stultz@linaro.org [ So I actually think that the two SOBs from PeterZ are the right depiction of the patch route. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-13locking/lockdep: Mark __lockdep_count_forward_deps() as staticFengguang Wu
There are new Sparse warnings: >> kernel/locking/lockdep.c:1235:15: sparse: symbol '__lockdep_count_forward_deps' was not declared. Should it be static? >> kernel/locking/lockdep.c:1261:15: sparse: symbol '__lockdep_count_backward_deps' was not declared. Should it be static? Please consider folding the attached diff :-) Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/527d1787.ThzXGoUspZWehFDl\%fengguang.wu@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-13prepend_path() needs to reinitialize dentry/vfsmount/mnt on restartsAl Viro
... and equivalent is needed in 3.12; it's broken there as well Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-11-13fix unpaired rcu lock in prepend_path()Li Zhong
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-11-13sched/fair: Avoid integer overflowMichal Nazarewicz
sa->runnable_avg_sum is of type u32 but after shifting it by NICE_0_SHIFT bits it is promoted to u64. This of course makes no sense, since the result will never be more then 32-bit long. Casting sa->runnable_avg_sum to u64 before it is shifted, fixes this problem. Reviewed-by: Ben Segall <bsegall@google.com> Signed-off-by: Michal Nazarewicz <mina86@mina86.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1384112521-25177-1-git-send-email-mpn@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-13sched: Optimize task_sched_runtime()Peter Zijlstra
Large multi-threaded apps like to hit this using do_sys_times() and then queue up on the rq->lock. Avoid when possible. Larry reported ~20% performance increase his test case. Reported-by: Larry Woodman <lwoodman@redhat.com> Suggested-by: Paul Turner <pjt@google.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/20131111172925.GG26898@twins.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-13sched/numa: Cure update_numa_stats() vs. hotplugPeter Zijlstra
Because we're completely unserialized against hotplug its well possible to try and generate numa stats for an offlined node. Bail out early (and avoid a /0) in this case. The resulting stats are all 0 which should result in an undesirable balance target -- not to mention that actually trying to migrate to an offline CPU will fail. Reported-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Mel Gorman <mgorman@suse.de> Link: http://lkml.kernel.org/n/tip-orja0qylcvyhxfsuebcyL5sI@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-13sched/numa: Fix NULL pointer dereference in task_numa_migrate()Rik van Riel
The cpusets code can split up the scheduler's domain tree into smaller domains. Some of those smaller domains may not cross NUMA nodes at all, leading to a NULL pointer dereference on the per-cpu sd_numa pointer. Tasks cannot be migrated out of their domain, so the patch also sets p->numa_preferred_nid to whereever they are, to prevent the migration from being retried over and over again. Reported-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Rik van Riel <riel@redhat.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Mel Gorman <mgorman@suse.de> Link: http://lkml.kernel.org/n/tip-oosqomw0Jput0Jkvoowhrqtu@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-13sched: Fix endless sync_sched/rcu() loop inside _cpu_down()Michael wang
Commit 6acce3ef8: sched: Remove get_online_cpus() usage tries to do sync_sched/rcu() inside _cpu_down() but triggers: INFO: task swapper/0:1 blocked for more than 120 seconds. ... [<ffffffff811263dc>] synchronize_rcu+0x2c/0x30 [<ffffffff81d1bd82>] _cpu_down+0x2b2/0x340 ... It was caused by that in the rcu boost case we rely on smpboot thread to finish the rcu callback, which has already been parked before sync in here and leads to the endless sync_sched/rcu(). This patch exchanges the sequence of smpboot_park_threads() and sync_sched/rcu() to fix the bug. Reported-by: Fengguang Wu <fengguang.wu@intel.com> Tested-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Michael Wang <wangyun@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/5282EDC0.6060003@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-13locks: missing unlock on error in generic_add_lease()Dan Carpenter
We should unlock here before returning. Fixes: df4e8d2c1d2b ('locks: implement delegations') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-11-13aio: checking for NULL instead of IS_ERRDan Carpenter
alloc_anon_inode() returns an ERR_PTR(), it doesn't return NULL. Fixes: 71ad7490c1f3 ('rework aio migrate pages to use aio fs') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-11-13dma: mxs-dma: Use semaphores for cyclic DMAMarkus Pargmann
mxs dma channel hardware reset command is not reliable and can cause a channel stall. The only way to fix the channel stall is a DMA engine reset. To avoid channel resets we use the hardware semaphore counter. For each transmitted segment, the DMA channel will decrease the counter by one. To use this mechanism with cyclic DMA, we need to increase the semaphore counter with each completed DMA command in the interrupt handler. To avoid any interruptions between the DMA transfers, the semaphore counter is initialized with 2. This way the counter can be increased in the interrupt handler without an influence on the transfer of the DMA engine. When disabling the channel, we stop increasing the semaphore counter in the interrupt handler. This patch was tested on i.MX28 with the SAIF DMA channel. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13dma: mxs-dma: Update state after channel resetMarkus Pargmann
After a channel reset, the channel stops running automatically. The state update was missing so that a channel perperation right after a channel reset failed. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13dma: mxs-dma: Fix channel reset hardware bugMarkus Pargmann
This is no official errata, but I noticed that the channel reset may stop working if the DMA state engine is in the READ_FLUSH state. This patch uses the channel debug1 register to wait for the DMA statemachine to leave the READ_FLUSH state. After that we can continue to reset the channel. Tested on i.MX28. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13dma: mxs-dma: Report correct residue for cyclic DMAMarkus Pargmann
Use the channel's buffer address register to calculate correct residue value for tx_status. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13dma: mxs-dma: Cleanup interrupt handlerMarkus Pargmann
The DMA interrupt handler uses its controll registers to handle all available channel interrupts it can find. This patch changes it to handle only one interrupt by directly mapping irq number to channel. It also includes a cleanup of the ctrl-register usage. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13DMA: Freescale: update driver to support 8-channel DMA engineHongbo Zhang
This patch adds support to 8-channel DMA engine, thus the driver works for both the new 8-channel and the legacy 4-channel DMA engines. Signed-off-by: Hongbo Zhang <hongbo.zhang@freescale.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13DMA: Freescale: Add new 8-channel DMA engine device tree nodesHongbo Zhang
Freescale QorIQ T4 and B4 introduce new 8-channel DMA engines, this patch adds the device tree nodes for them. Signed-off-by: Hongbo Zhang <hongbo.zhang@freescale.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-13DMA: Freescale: revise device tree binding documentHongbo Zhang
This patch updates the discription of each type of DMA controller and its channels, it is preparation for adding another new DMA controller binding, it also fixes some defects of indent for text alignment at the same time. Signed-off-by: Hongbo Zhang <hongbo.zhang@freescale.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
generated by cgit (git 2.34.1) at 2025-09-15 09:31:50 +0000