summaryrefslogtreecommitdiff
AgeCommit message (Collapse)Author
2013-01-29m68k: Provide dma_mmap_coherent() and dma_get_sgtable()Geert Uytterhoeven
m68k/allmodconfig: drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_mmap’: drivers/media/v4l2-core/videobuf2-dma-contig.c:204: error: implicit declaration of function ‘dma_mmap_coherent’ drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_get_base_sgt’: drivers/media/v4l2-core/videobuf2-dma-contig.c:387: error: implicit declaration of function ‘dma_get_sgtable’ For architectures using dma_map_ops, dma_mmap_coherent() and dma_get_sgtable() are provided in <asm-generic/dma-mapping-common.h>. M68k does not use dma_map_ops, hence it should implement them as inline stubs using dma_common_mmap() and dma_common_get_sgtable(). Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: linux-m68k@lists.linux-m68k.org Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2013-01-29frv: Provide dummy dma_mmap_coherent() and dma_get_sgtable()Geert Uytterhoeven
frv/allmodconfig: drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_mmap’: drivers/media/v4l2-core/videobuf2-dma-contig.c:204: error: implicit declaration of function ‘dma_mmap_coherent’ drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_get_base_sgt’: drivers/media/v4l2-core/videobuf2-dma-contig.c:387: error: implicit declaration of function ‘dma_get_sgtable’ For architectures using dma_map_ops, dma_mmap_coherent() and dma_get_sgtable() are provided in <asm-generic/dma-mapping-common.h>. Frv does not use dma_map_ops, hence it should implement them itself. For now, use dummy implementations that just return -EINVAL, until the API has been finalized. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2013-01-29cris: Provide dma_mmap_coherent() and dma_get_sgtable()Geert Uytterhoeven
cris/allmodconfig: drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_mmap’: drivers/media/v4l2-core/videobuf2-dma-contig.c:204: error: implicit declaration of function ‘dma_mmap_coherent’ drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_get_base_sgt’: drivers/media/v4l2-core/videobuf2-dma-contig.c:387: error: implicit declaration of function ‘dma_get_sgtable’ For architectures using dma_map_ops, dma_mmap_coherent() and dma_get_sgtable() are provided in <asm-generic/dma-mapping-common.h>. Cris does not use dma_map_ops, hence it should implement them as inline stubs using dma_common_mmap() and dma_common_get_sgtable(). Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: linux-cris-kernel@axis.com Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2013-01-29c6x: Provide dummy dma_mmap_coherent() and dma_get_sgtable()Geert Uytterhoeven
c6x/allmodconfig (assumed): drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_mmap’: drivers/media/v4l2-core/videobuf2-dma-contig.c:204: error: implicit declaration of function ‘dma_mmap_coherent’ drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_get_base_sgt’: drivers/media/v4l2-core/videobuf2-dma-contig.c:387: error: implicit declaration of function ‘dma_get_sgtable’ For architectures using dma_map_ops, dma_mmap_coherent() and dma_get_sgtable() are provided in <asm-generic/dma-mapping-common.h>. C6x does not use dma_map_ops, hence it should implement them itself. For now, use dummy implementations that just return -EINVAL, until the API has been finalized. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: linux-c6x-dev@linux-c6x.org Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2013-01-29blackfin: Provide dma_mmap_coherent() and dma_get_sgtable()Geert Uytterhoeven
blackfin/allmodconfig: drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_mmap’: drivers/media/v4l2-core/videobuf2-dma-contig.c:204: error: implicit declaration of function ‘dma_mmap_coherent’ drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_get_base_sgt’: drivers/media/v4l2-core/videobuf2-dma-contig.c:387: error: implicit declaration of function ‘dma_get_sgtable’ For architectures using dma_map_ops, dma_mmap_coherent() and dma_get_sgtable() are provided in <asm-generic/dma-mapping-common.h>. Blackfin does not use dma_map_ops, hence it should implement them as inline stubs using dma_common_mmap() and dma_common_get_sgtable(). Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: uclinux-dist-devel@blackfin.uclinux.org Acked-by: Scott Jiang <scott.jiang.linux@gmail.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2013-01-29avr32: Provide dma_mmap_coherent() and dma_get_sgtable()Geert Uytterhoeven
avr32/allmodconfig: drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_mmap’: drivers/media/v4l2-core/videobuf2-dma-contig.c:204: error: implicit declaration of function ‘dma_mmap_coherent’ drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_get_base_sgt’: drivers/media/v4l2-core/videobuf2-dma-contig.c:387: error: implicit declaration of function ‘dma_get_sgtable’ For architectures using dma_map_ops, dma_mmap_coherent() and dma_get_sgtable() are provided in <asm-generic/dma-mapping-common.h>. Avr32 does not use dma_map_ops, hence it should implement them as inline stubs using dma_common_mmap() and dma_common_get_sgtable(). Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2013-01-28Merge tag 'regulator-3.8-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator Pull regulator fixes from Mark Brown: "Fairly small stuff - a build failure fix for ST platforms, an error checking fix and an update to the MAINTAINERS file for Liam." * tag 'regulator-3.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: regulator: tps80031: Use IS_ERR to check return value of regulator_register() regulators: db8500: Fix compile failure for drivers/regulator/dbx500-prcmu.c regulator: MAINTAINERS: update email address
2013-01-29ARM: EXYNOS: Enable platform support for I2S controllersPadmavathi Venna
Add AUXDATA entries for i2s controller driver so as to set the device name for clock lookups Signed-off-by: Padmavathi Venna <padma.v@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-29ARM: dts: Add nodes for i2s controllers for Samsung Exynos5 platformsPadmavathi Venna
Add device nodes for the three instances of i2s controllers in Exynos5 platforms. Enable instance i2s 0 for exynos5250 board and disable all other i2s instances. Signed-off-by: Padmavathi Venna <padma.v@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-29spi: s3c64xx: Modify SPI driver to use generic DMA DT supportPadmavathi Venna
This patch modifies the SPI driver to use generic dma dt bindings support. This passes all the required arguments to dma dev request functon which in turn calls the dma_request_slave_channel or dma__ request_channel based on DT or non-DT respectively. Signed-off-by: Padmavathi Venna <padma.v@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-29ARM: SAMSUNG: Make dma request compatible to generic dma bindings.Padmavathi Venna
This patch make the dma dev request operation compatible for both DT and non-DT cases. It takes the all the arguments required for dma_request_slave_channel and dma_request_channel. If the driver is initiated via DT or non-DT the corresponding call will be made. Signed-off-by: Padmavathi Venna <padma.v@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-28Merge branches 'doctorture.2013.01.29a', 'fixes.2013.01.26a', ↵Paul E. McKenney
'tagcb.2013.01.24a' and 'tiny.2013.01.29b' into HEAD doctorture.2013.01.11a: Changes to rcutorture and to RCU documentation. fixes.2013.01.26a: Miscellaneous fixes. tagcb.2013.01.24a: Tag RCU callbacks with grace-period number to simplify callback advancement. tiny.2013.01.29b: Enhancements to uniprocessor handling in tiny RCU.
2013-01-28rcu: Make rcutorture's shuffler task shuffle recently added tasksPaul E. McKenney
A number of kthreads have been added to rcutorture, but the shuffler task was not informed of them, and thus did not shuffle them. This commit therefore adds the requisite shuffling, and, while in the area fixes up some whitespace issues. However, the shuffling is intended to keep randomly selected CPUs idle, which means that the RCU priority boosting kthreads need to avoid waking up every jiffy. This commit also makes that fix. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2013-01-28rcu: Allow TREE_PREEMPT_RCU on UP systemsPaul E. McKenney
The TINY_PREEMPT_RCU is complex, does not provide that much memory savings, and therefore TREE_PREEMPT_RCU should be used instead. The systems where the difference between TINY_PREEMPT_RCU and TREE_PREEMPT_RCU are quite small compared to the memory footprint of CONFIG_PREEMPT. This commit therefore takes a first step towards eliminating TINY_PREEMPT_RCU by allowing TREE_PREEMPT_RCU to be configured on !SMP systems. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2013-01-28rcu: Provide RCU CPU stall warnings for tiny RCUPaul E. McKenney
Tiny RCU has historically omitted RCU CPU stall warnings in order to reduce memory requirements, however, lack of these warnings caused Thomas Gleixner some debugging pain recently. Therefore, this commit adds RCU CPU stall warnings to tiny RCU if RCU_TRACE=y. This keeps the memory footprint small, while still enabling CPU stall warnings in kernels built to enable them. Updated to include Josh Triplett's suggested use of RCU_STALL_COMMON config variable to simplify #if expressions. Reported-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2013-01-29ASoC: samsung: Add DT support for i2sPadmavathi Venna
Add support for device based discovery. Signed-off-by: Padmavathi Venna <padma.v@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-28net neigh: Optimize neighbor entry size calculation.YOSHIFUJI Hideaki / 吉藤英明
When allocating memory for neighbour cache entry, if tbl->entry_size is not set, we always calculate sizeof(struct neighbour) + tbl->key_len, which is common in the same table. With this change, set tbl->entry_size during the table initialization phase, if it was not set, and use it in neigh_alloc() and neighbour_priv(). This change also allow us to have both of protocol private data and device priate data at tha same time. Note that the only user of prototcol private is DECnet and the only user of device private is ATM CLIP. Since those are exclusive, we have not been facing issues here. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-29regmap: spi: Support asynchronous I/O for SPIMark Brown
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-28net: avoid to hang up on sending due to sysctl configuration overflow.bingtian.ly@taobao.com
I found if we write a larger than 4GB value to some sysctl variables, the sending syscall will hang up forever, because these variables are 32 bits, such large values make them overflow to 0 or negative. This patch try to fix overflow or prevent from zero value setup of below sysctl variables: net.core.wmem_default net.core.rmem_default net.core.rmem_max net.core.wmem_max net.ipv4.udp_rmem_min net.ipv4.udp_wmem_min net.ipv4.tcp_wmem net.ipv4.tcp_rmem Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Li Yu <raise.sail@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-29regmap: Add asynchronous I/O supportMark Brown
Some use cases like firmware download can transfer a lot of data in quick succession. With high speed buses these use cases can benefit from having multiple transfers scheduled at once since this allows the bus to minimise the delay between transfers. Support this by adding regmap_raw_write_async(), allowing raw transfers to be scheduled, and regmap_async_complete() to wait for them to finish. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-29regmap: Add "no-bus" option for regmap APIAndrey Smirnov
This commit adds provision for "no-bus" usage of the regmap API. In this configuration user can provide API with two callbacks 'reg_read' and 'reg_write' which are to be called when reads and writes to one of device's registers is performed. This is useful for devices that expose registers but whose register access sequence does not fit the 'bus' abstraction. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-29Merge remote-tracking branch 'regulator/fix/lrg' into tmpMark Brown
2013-01-29Merge remote-tracking branch 'regulator/fix/tps80031' into tmpMark Brown
2013-01-29Merge remote-tracking branch 'regulator/fix/db8500' into tmpMark Brown
2013-01-28x86: Require MOVBE feature in cpuid when we use itDavid Woodhouse
Add MOVBE to asm/required-features.h so we check for it during startup and don't bother checking for it later. CONFIG_MATOM is used because it corresponds to -march=atom in the Makefiles. If the rules get more complicated it may be necessary to make this an explicit Kconfig option which uses -mmovbe/-mno-movbe to control the use of this instruction explicitly. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Link: http://lkml.kernel.org/r/1359395390.3529.65.camel@shinybook.infradead.org [ hpa: added a patch description ] Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-01-28Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc fixes from Benjamin Herrenschmidt: "Whenever you have a chance between two dives, you might want to consider pulling my merge branch to pickup a few fixes for 3.8 that have been accumulating for the last couple of weeks (I was myself travelling then on vacation). Nothing major, just a handful of powerpc bug fixes that I consider worth getting in before 3.8 goes final." And I'll have everybody know that I'm not diving for several days yet. Snif. * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc: Max next_tb to prevent from replaying timer interrupt powerpc: kernel/kgdb.c: Fix memory leakage powerpc/book3e: Disable interrupt after preempt_schedule_irq powerpc/oprofile: Fix error in oprofile power7_marked_instr_event() function powerpc/pasemi: Fix crash on reboot powerpc: Fix MAX_STACK_TRACE_ENTRIES too low warning for ppc32
2013-01-28via-rhine: add 64bit statistics.Jamie Gloudon
Switch to use ndo_get_stats64 to get 64bit statistics. Signed-off-by: Jamie Gloudon <jamie.gloudon@gmail.com> Tested-by: Jamie Gloudon <jamie.gloudon@gmail.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-28drivers/net/phy/micrel_phy: Add support for new PHYsDavid J. Choi
Summary of changes: .Newly added phys -KSZ8081/KSZ8091, which has some phy ids. -KSZ8061 -KSZ9031, which is Gigabit phy. -KSZ886X, which has a switch function. -KSZ8031, which has a same phy ids with KSZ8021. Signed-off-by: David J. Choi <david.choi@micrel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-28net: phy: realtek: add rtl8211e driverGiuseppe CAVALLARO
This patch adds the minimal driver to manage the Realtek RTL8211E 10/100/1000 Transceivers. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-28netpoll: use the net namespace of current process instead of init_netCong Wang
This will allow us to setup netconsole in a different namespace rather than where init_net is. Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-28netpoll: use ipv6_addr_equal() to compare ipv6 addrCong Wang
ipv6_addr_equal() is faster. Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-28netpoll: add RCU annotation to npinfo fieldCong Wang
dev->npinfo is protected by RCU. This fixes the following sparse warnings: net/core/netpoll.c:177:48: error: incompatible types in comparison expression (different address spaces) net/core/netpoll.c:200:35: error: incompatible types in comparison expression (different address spaces) net/core/netpoll.c:221:35: error: incompatible types in comparison expression (different address spaces) net/core/netpoll.c:327:18: error: incompatible types in comparison expression (different address spaces) Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-28Merge branch 'for-davem' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next John W. Linville says: ==================== Included is an NFC pull. Samuel says: "It brings the following goodies: - LLCP socket timestamping (To be used e.g with the recently released nfctool application for a more efficient skb timestamping when sniffing). - A pretty big pn533 rework from Waldemar, preparing the driver to support more flavours of pn533 based devices. - HCI changes from Eric in preparation for the microread driver support. - Some LLCP memory leak fixes, cleanups and slight improvements. - pn544 and nfcwilink move to the devm_kzalloc API. - An initial Secure Element (SE) API. - An nfc.h license change from the original author, allowing non GPL application code to safely include it." Also included are a pair of mac80211 pulls. Johannes says: "We found two bugs in the previous code, so I'm sending you a pull request again this soon. This contains two regulatory bug fixes, some of Thomas's hwsim beacon timer work and a documentation fix from Bob." "Another pull request for mac80211-next. This time, I have a number of things, the patches are mostly self-explanatory. There are a few fixes from Felix and myself, and random cleanups & improvements. The biggest thing is the partial patchset from Marco preparing for mesh powersave." Additionally, there are a pair of iwlwifi pulls. Johannes says: "For iwlwifi-next, I have a few cleanups/improvements as well as a few not very important fixes and more preparations for new devices." "Please pull a few updates for iwlwifi. These are just some cleanups and a debug improvement." On top of that, there is a slew of driver updates. This includes brcmfmac, mwifiex, ath9k, carl9170, and mwl8k as well as a handful of others. The bcma and ssb busses get some attention as well. Still, I don't see any big headliners here. Also included is a pull of the wireless tree, in order to resolve some merge conflicts. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-28Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-next Jeff Kirsher says: ==================== This series contains updates to e1000e, ixgbevf, igb and igbvf. Majority of the patches are code cleanups of e1000e where code is removed (Yeah!). The other two e1000e patches are fixes. The first is to fix the maximum frame size for 82579 devices. The second fix is to resolve an issue with devices other than 82579 that suffer from dropped transactions on platforms with deep C-states when jumbo frames are enabled. The ixgbevf patch is to ensure that the driver fetches the correct, refreshed value for link status and speed when the values have changed. The igb and igbvf patches are a solution to an issue Stefan Assmann reported, where when the PF is up and igbvf is loaded, the MAC address is not generated using eth_hw_addr_random(). ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-29powerpc: Max next_tb to prevent from replaying timer interruptTiejun Chen
With lazy interrupt, we always call __check_irq_replaysome with decrementers_next_tb to check if we need to replay timer interrupt. So in hotplug case we also need to set decrementers_next_tb as MAX to make sure __check_irq_replay don't replay timer interrupt when return as we expect, otherwise we'll trap here infinitely. Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29powerpc: kernel/kgdb.c: Fix memory leakageCong Ding
the variable backup_current_thread_info isn't freed before existing the function. Signed-off-by: Cong Ding <dinggnu@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29powerpc/book3e: Disable interrupt after preempt_schedule_irqTiejun Chen
In preempt case current arch_local_irq_restore() from preempt_schedule_irq() may enable hard interrupt but we really should disable interrupts when we return from the interrupt, and so that we don't get interrupted after loading SRR0/1. Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com> CC: <stable@vger.kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29powerpc/oprofile: Fix error in oprofile power7_marked_instr_event() functionCarl E. Love
The calculation for the left shift of the mask OPROFILE_PM_PMCSEL_MSK has an error. The calculation is should be to shift left by (max_cntrs - cntr) times the width of the pmsel field width. However, the #define OPROFILE_MAX_PMC_NUM was used instead of OPROFILE_PMSEL_FIELD_WIDTH. This patch fixes the calculation. Signed-off-by: Carl Love <cel@us.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29powerpc/pasemi: Fix crash on rebootSteven Rostedt
commit f96972f2dc "kernel/sys.c: call disable_nonboot_cpus() in kernel_restart()" added a call to disable_nonboot_cpus() on kernel_restart(), which tries to shutdown all the CPUs except the first one. The issue with the PA Semi, is that it does not support CPU hotplug. When the call is made to __cpu_down(), it calls the notifiers CPU_DOWN_PREPARE, and then tries to take the CPU down. One of the notifiers to the CPU hotplug code, is the cpufreq. The DOWN_PREPARE will call __cpufreq_remove_dev() which calls cpufreq_driver->exit. The PA Semi exit handler unmaps regions of I/O that is used by an interrupt that goes off constantly (system_reset_common, but it goes off during normal system operations too). I'm not sure exactly what this interrupt does. Running a simple function trace, you can see it goes off quite a bit: # tracer: function # # TASK-PID CPU# TIMESTAMP FUNCTION # | | | | | <idle>-0 [001] 1558.859363: .pasemi_system_reset_exception <-.system_reset_exception <idle>-0 [000] 1558.860112: .pasemi_system_reset_exception <-.system_reset_exception <idle>-0 [000] 1558.861109: .pasemi_system_reset_exception <-.system_reset_exception <idle>-0 [001] 1558.861361: .pasemi_system_reset_exception <-.system_reset_exception <idle>-0 [000] 1558.861437: .pasemi_system_reset_exception <-.system_reset_exception When the region is unmapped, the system crashes with: Disabling non-boot CPUs ... Error taking CPU1 down: -38 Unable to handle kernel paging request for data at address 0xd0000800903a0100 Faulting instruction address: 0xc000000000055fcc Oops: Kernel access of bad area, sig: 11 [#1] PREEMPT SMP NR_CPUS=64 NUMA PA Semi PWRficient Modules linked in: shpchp NIP: c000000000055fcc LR: c000000000055fb4 CTR: c0000000000df1fc REGS: c0000000012175d0 TRAP: 0300 Not tainted (3.8.0-rc4-test-dirty) MSR: 9000000000009032 <SF,HV,EE,ME,IR,DR,RI> CR: 24000088 XER: 00000000 SOFTE: 0 DAR: d0000800903a0100, DSISR: 42000000 TASK = c0000000010e9008[0] 'swapper/0' THREAD: c000000001214000 CPU: 0 GPR00: d0000800903a0000 c000000001217850 c0000000012167e0 0000000000000000 GPR04: 0000000000000000 0000000000000724 0000000000000724 0000000000000000 GPR08: 0000000000000000 0000000000000000 0000000000000001 0000000000a70000 GPR12: 0000000024000080 c00000000fff0000 ffffffffffffffff 000000003ffffae0 GPR16: ffffffffffffffff 0000000000a21198 0000000000000060 0000000000000000 GPR20: 00000000008fdd35 0000000000a21258 000000003ffffaf0 0000000000000417 GPR24: 0000000000a226d0 c000000000000000 0000000000000000 0000000000000000 GPR28: c00000000138b358 0000000000000000 c000000001144818 d0000800903a0100 NIP [c000000000055fcc] .set_astate+0x5c/0xa4 LR [c000000000055fb4] .set_astate+0x44/0xa4 Call Trace: [c000000001217850] [c000000000055fb4] .set_astate+0x44/0xa4 (unreliable) [c0000000012178f0] [c00000000005647c] .restore_astate+0x2c/0x34 [c000000001217980] [c000000000054668] .pasemi_system_reset_exception+0x6c/0x88 [c000000001217a00] [c000000000019ef0] .system_reset_exception+0x48/0x84 [c000000001217a80] [c000000000001e40] system_reset_common+0x140/0x180 Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-28can: rework skb reserved data handlingOliver Hartkopp
Added accessor and skb_reserve helpers for struct can_skb_priv. Removed pointless skb_headroom() check. Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> CC: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-28Merge tag 'md-3.8-fixes' of git://neil.brown.name/mdLinus Torvalds
Pull dmraid fix from NeilBrown: "Just one fix for md in 3.8 dmraid assess redundancy and replacements slightly inaccurately which could lead to some degraded arrays failing to assemble." * tag 'md-3.8-fixes' of git://neil.brown.name/md: DM-RAID: Fix RAID10's check for sufficient redundancy
2013-01-29powerpc: Fix MAX_STACK_TRACE_ENTRIES too low warning for ppc32Li Zhong
This patch fixes MAX_STACK_TRACE_ENTRIES too low warning for ppc32, which is similar to commit 12660b17. Reported-by: Christian Kujau <lists@nerdbynature.de> Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com> Tested-by: Christian Kujau <lists@nerdbynature.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-28xfs: Fix xfs_swap_extents() after removal of xfs_flushinval_pages()Torsten Kaiser
Commit fb59581404ab7ec5075299065c22cb211a9262a9 removed xfs_flushinval_pages() and changed its callers to use filemap_write_and_wait() and truncate_pagecache_range() directly. But in xfs_swap_extents() this change accidental switched the argument for 'tip' to 'ip'. This patch switches it back to 'tip' Signed-off-by: Torsten Kaiser <just.for.lkml@googlemail.com> Reviewed-by: Ben Myers <bpm@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
2013-01-28Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixesLinus Torvalds
Pull GFS2 fix from Steven Whitehouse. * git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes: GFS2: fix skip unlock condition
2013-01-28Merge tag 'iommu-fixes-v3.8-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull IOMMU fix from Joerg Roedel: "One fix for the AMD IOMMU driver to work around broken BIOSes found in the field. Some BIOSes forget to enable a workaround for a hardware problem which might cause the IOMMU to stop working under high load conditions. The fix makes sure this workaround is enabled." * tag 'iommu-fixes-v3.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: IOMMU, AMD Family15h Model10-1Fh erratum 746 Workaround
2013-01-28Merge tag 'mfd-for-linus-3.8-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6 Pull MFD fixes from Samuel Ortiz: "This is the first pull request for MFD fixes for 3.8 We have some build failure fixes (twl4030, vexpress, abx500 and tps65910), some actual runtime oops and lockup fixes (rtsx, da9052), and some more hypothetical NULL pointers dereferences fixes for pcf50633 and max776xx. Then we also have additional rtsx fixes for a correct switch output voltage and clock divider correctness for rtl8411 (rtsx driver), and irqdomain fix for db8550-prcmu, and some more cosmetic fixes for arizona and wm5102." * tag 'mfd-for-linus-3.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: mfd: rtsx: Fix oops when rtsx_pci_sdmmc is not probed mfd: wm5102: Fix definition of WM5102_MAX_REGISTER mfd: twl4030: Don't warn about uninitialized return code mfd: da9052/53 lockup fix mfd: rtsx: Add clock divider hook mmc: rtsx: Call MFD hook to switch output voltage mfd: rtsx: Add output voltage switch hook mfd: Fix compile errors and warnings when !CONFIG_AB8500_BM mfd: vexpress: Export global functions to fix build error mfd: arizona: Check errors from regcache_sync() mfd: tc3589x: Use simple irqdomain mfd: pcf50633: Init pcf->dev before using it mfd: max77693: Init max77693->dev before using it mfd: max77686: Init max77686->dev before using it mfd: db8500-prcmu: Fix irqdomain usage mfd: tps65910: Select REGMAP_IRQ in Kconfig to fix build error mfd: arizona: Disable control interface reporting for WM5102 and WM5110
2013-01-28xfs: Fix xfs_swap_extents() after removal of xfs_flushinval_pages()Torsten Kaiser
Commit fb59581404ab7ec5075299065c22cb211a9262a9 removed xfs_flushinval_pages() and changed its callers to use filemap_write_and_wait() and truncate_pagecache_range() directly. But in xfs_swap_extents() this change accidental switched the argument for 'tip' to 'ip'. This patch switches it back to 'tip' Signed-off-by: Torsten Kaiser <just.for.lkml@googlemail.com> Reviewed-by: Ben Myers <bpm@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
2013-01-28rtlwifi: Fix the usage of the wrong variable in usb.cLarry Finger
In routine _rtl_rx_pre_process(), skb_dequeue() is called to get an skb; however, the wrong variable name is used in subsequent calls. Reported-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Stable <stable@vger.kernel.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2013-01-28bcma: fix NAND flash validationRafał Miłecki
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2013-01-28brcmsmac: fix tx status processingArend van Spriel
This issue was reported on the wireless list (see [1]) in which brcmsmac ran into a fatal error: [ 588.284074] brcmsmac bcma0:0: frameid != txh->TxFrameID [ 588.284098] brcmsmac bcma0:0: MI_TFS: fatal [ 588.284103] brcmsmac bcma0:0: wl0: fatal error, reinitializing [ 588.286208] ieee80211 phy0: Hardware restart was requested The tx status feedback is processed in a loop limiting the number of frames processed in one run. The code terminate processing when the limit is reached regardless the txstatus value read from the device register. When that status is is flagged as being valid it must be processed as the hardware will clear it after is has been read. Bisecting was done by Seth Forshee and showed following commit as the culprit: commit 57fe504817ccec9b6ac23e973d2925343bf1e3b6 Author: Piotr Haber <phaber@broadcom.com> Date: Wed Nov 28 21:44:07 2012 +0100 brcmsmac: fix bounds checking in tx/rx [1] http://www.spinics.net/lists/linux-wireless/msg101293.html Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Tested-by: Seth Forshee <seth.forshee@canonical.com> Reviewed-by: Hante Meuleman <meuleman@broadcom.com> Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com> Signed-off-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>