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2011-10-31[SCSI] scsi_dh: check queuedata pointer before proceeding furtherMoger, Babu
This patch validates sdev pointer in scsi_dh_activate before proceeding further. Without this check we might see the panic as below. I have seen this panic multiple times.. Call trace: #0 [ffff88007d647b50] machine_kexec at ffffffff81020902 #1 [ffff88007d647ba0] crash_kexec at ffffffff810875b0 #2 [ffff88007d647c70] oops_end at ffffffff8139c650 #3 [ffff88007d647c90] __bad_area_nosemaphore at ffffffff8102dd15 #4 [ffff88007d647d50] page_fault at ffffffff8139b8cf [exception RIP: scsi_dh_activate+0x82] RIP: ffffffffa0041922 RSP: ffff88007d647e00 RFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000000093c5 RDX: 00000000000093c5 RSI: ffffffffa02e6640 RDI: ffff88007cc88988 RBP: 000000000000000f R8: ffff88007d646000 R9: 0000000000000000 R10: ffff880082293790 R11: 00000000ffffffff R12: ffff88007cc88988 R13: 0000000000000000 R14: 0000000000000286 R15: ffff880037b845e0 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0000 #5 [ffff88007d647e38] run_workqueue at ffffffff81060268 #6 [ffff88007d647e78] worker_thread at ffffffff81060386 #7 [ffff88007d647ee8] kthread at ffffffff81064436 #8 [ffff88007d647f48] kernel_thread at ffffffff81003fba Signed-off-by: Babu Moger <babu.moger@netapp.com> Cc: stable@kernel.org Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2011-10-31ALSA: intel8x0: Improve performance in virtual environmentKonstantin Ozerkov
v3: detection code is x86 and KVM specific, hide it under ifdef v2: add detection for virtual environments (KVM and Parallels) This patch is intended to improve performance in virtualized environments like Parallels Desktop or KVM/VirtualBox/QEMU (virtual ICH/AC97 audio). I/O access is very time-expensive operation in virtual world: VCPU can be rescheduled and in the worst case we get more than 10ms delay on each I/O access. In the virtual environment loop exit rule (old_civ == current_civ && old_picb == current_picb) is never satisfied, because old_picb is never the same as current_picb due to delay inspired by reading current_civ. As a result loop ended by timeout and we get 10x more I/O operations. Experimental data from Prallels Desktop 7, RHEL6 guest (I/O ops per second): Original code: In Port Counter Callback f014 41550 fffff00000179d00 ac97_bm_read_civ+0x000 f018 41387 fffff0000017a580 ac97_bm_read_picb+0x000 With patch: In Port Counter Callback f014 4090 fffff00000179d00 ac97_bm_read_civ+0x000 f018 1964 fffff0000017a580 ac97_bm_read_picb+0x000 Signed-off-by: Konstantin Ozerkov <kozerkov@parallels.com> Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-10-31ALSA: hdspm - Enable all firmware ranges for PCI MADI/AES cardsAdrian Knoth
From the Windows INF file, we know the firmware ranges for all RME cards. For PCIe, a single revision ID per device (RayDAT, MADI, AIO, AES) is used. Contrary, the older PCI versions use ranges, that is, one revision ID per firmware version. Instead of listing all possible revisions individually, match the range. This commit enables all MADI and AES PCI versions ever shipped. Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-10-31ALSA: hdsp - Correct HDSP_VERSION_BIT constant, thus partly fixing RPM detectionAdrian Knoth
HDSP_VERSION_BIT has to be ORed with HDSP_S_LOAD. This fixes the detection of at least some RME RPM boxes. Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-10-31ALSA: hdspm - Fix MADI channel format in the status ioctlAdrian Knoth
SNDRV_HDSPM_IOCTL_GET_STATUS is supposed to query the current card status, so we have to return what we receive on the MADI wire (RX), not what we transmit (TX) to others. The latter is a config item to be queried via SNDRV_HDSPM_IOCTL_GET_CONFIG. Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-10-31ALSA: hwdep: silence integer overflow warningDan Carpenter
Smatch complains that if device is INT_MAX then device + 1 can overflow. It just means we would have an annoying loop while we check all the devices from -2147483648 to SNDRV_MINOR_HWDEPS. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-10-31sparc64: Fix masking and shifting in VIS fpcmp emulation.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-10-31virtio-blk: use ida to allocate disk indexMichael S. Tsirkin
Based on a patch by Mark Wu <dwu@redhat.com> Current index allocation in virtio-blk is based on a monotonically increasing variable "index". This means we'll run out of numbers after a while. It also could cause confusion about the disk name in the case of hot-plugging disks. Change virtio-blk to use ida to allocate index, instead. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2011-10-31md/raid10: Fix bug when activating a hot-spare.NeilBrown
This is a fairly serious bug in RAID10. When a RAID10 array is degraded and a hot-spare is activated, the spare does not take up the empty slot, but rather replaces the first working device. This is likely to make the array non-functional. It would normally be possible to recover the data, but that would need care and is not guaranteed. This bug was introduced in commit 2bb77736ae5dca0a189829fbb7379d43364a9dac which first appeared in 3.1. Cc: stable@kernel.org Signed-off-by: NeilBrown <neilb@suse.de>
2011-10-31Merge branches 'stericsson/timer' and 'omap/dmtimer' into next/timerArnd Bergmann
2011-10-31Merge branch 'omap/voltage' into next/pmArnd Bergmann
2011-10-31Merge branch 'omap/cleanup' into next/cleanup2Arnd Bergmann
2011-10-30Merge branch 'i2c-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging * 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: i2c: Functions for byte-swapped smbus_write/read_word_data i2c-algo-pca: Return standard fault codes i2c-algo-bit: Return standard fault codes i2c-algo-bit: Be verbose on bus testing failure i2c-algo-bit: Let user test buses without failing i2c/scx200_acb: Fix section mismatch warning in scx200_pci_drv i2c: I2C_ELEKTOR should depend on HAS_IOPORT
2011-10-30Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommuLinus Torvalds
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (33 commits) iommu/core: Remove global iommu_ops and register_iommu iommu/msm: Use bus_set_iommu instead of register_iommu iommu/omap: Use bus_set_iommu instead of register_iommu iommu/vt-d: Use bus_set_iommu instead of register_iommu iommu/amd: Use bus_set_iommu instead of register_iommu iommu/core: Use bus->iommu_ops in the iommu-api iommu/core: Convert iommu_found to iommu_present iommu/core: Add bus_type parameter to iommu_domain_alloc Driver core: Add iommu_ops to bus_type iommu/core: Define iommu_ops and register_iommu only with CONFIG_IOMMU_API iommu/amd: Fix wrong shift direction iommu/omap: always provide iommu debug code iommu/core: let drivers know if an iommu fault handler isn't installed iommu/core: export iommu_set_fault_handler() iommu/omap: Fix build error with !IOMMU_SUPPORT iommu/omap: Migrate to the generic fault report mechanism iommu/core: Add fault reporting mechanism iommu/core: Use PAGE_SIZE instead of hard-coded value iommu/core: use the existing IS_ALIGNED macro iommu/msm: ->unmap() should return order of unmapped page ... Fixup trivial conflicts in drivers/iommu/Makefile: "move omap iommu to dedicated iommu folder" vs "Rename the DMAR and INTR_REMAP config options" just happened to touch lines next to each other.
2011-10-30Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bpLinus Torvalds
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: amd64_edac: Cleanup return type of amd64_determine_edac_cap() amd64_edac: Add a fix for Erratum 505 EDAC, MCE, AMD: Simplify NB MCE decoder interface EDAC, MCE, AMD: Drop local coreid reporting EDAC, MCE, AMD: Print valid addr when reporting an error EDAC, MCE, AMD: Print CPU number when reporting the error
2011-10-30ext4: remove unnecessary call to waitqueue_active()Theodore Ts'o
The usage of waitqueue_active() is not necessary, and introduces (I believe) a hard-to-hit race. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-10-30Merge branch 'kvm-updates/3.2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm * 'kvm-updates/3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: (75 commits) KVM: SVM: Keep intercepting task switching with NPT enabled KVM: s390: implement sigp external call KVM: s390: fix register setting KVM: s390: fix return value of kvm_arch_init_vm KVM: s390: check cpu_id prior to using it KVM: emulate lapic tsc deadline timer for guest x86: TSC deadline definitions KVM: Fix simultaneous NMIs KVM: x86 emulator: convert push %sreg/pop %sreg to direct decode KVM: x86 emulator: switch lds/les/lss/lfs/lgs to direct decode KVM: x86 emulator: streamline decode of segment registers KVM: x86 emulator: simplify OpMem64 decode KVM: x86 emulator: switch src decode to decode_operand() KVM: x86 emulator: qualify OpReg inhibit_byte_regs hack KVM: x86 emulator: switch OpImmUByte decode to decode_imm() KVM: x86 emulator: free up some flag bits near src, dst KVM: x86 emulator: switch src2 to generic decode_operand() KVM: x86 emulator: expand decode flags to 64 bits KVM: x86 emulator: split dst decode to a generic decode_operand() KVM: x86 emulator: move memop, memopp into emulation context ...
2011-10-30Merge branch 'fbdev-next' of git://github.com/schandinat/linux-2.6Linus Torvalds
* 'fbdev-next' of git://github.com/schandinat/linux-2.6: (270 commits) video: platinumfb: Add __devexit_p at necessary place drivers/video: fsl-diu-fb: merge diu_pool into fsl_diu_data drivers/video: fsl-diu-fb: merge diu_hw into fsl_diu_data drivers/video: fsl-diu-fb: only DIU modes 0 and 1 are supported drivers/video: fsl-diu-fb: remove unused panel operating mode support drivers/video: fsl-diu-fb: use an enum for the AOI index drivers/video: fsl-diu-fb: add several new video modes drivers/video: fsl-diu-fb: remove broken screen blanking support drivers/video: fsl-diu-fb: move some definitions out of the header file drivers/video: fsl-diu-fb: fix some ioctls video: da8xx-fb: Increased resolution configuration of revised LCDC IP OMAPDSS: picodlp: add missing #include <linux/module.h> fb: fix au1100fb bitrot. mx3fb: fix NULL pointer dereference in screen blanking. video: irq: Remove IRQF_DISABLED smscufx: change edid data to u8 instead of char OMAPDSS: DISPC: zorder support for DSS overlays OMAPDSS: DISPC: VIDEO3 pipeline support OMAPDSS/OMAP_VOUT: Fix incorrect OMAP3-alpha compatibility setting video/omap: fix build dependencies ... Fix up conflicts in: - drivers/staging/xgifb/XGI_main_26.c Changes to XGIfb_pan_var() - drivers/video/omap/{lcd_apollon.c,lcd_ldp.c,lcd_overo.c} Removed (or in the case of apollon.c, merged into the generic DSS panel in drivers/video/omap2/displays/panel-generic-dpi.c)
2011-10-30Merge branches 'depends/rmk/io', 'depends/rmk/l2x0' and 'depends/rmk/gpio' ↵Arnd Bergmann
into highbank/soc
2011-10-30ext4: Use correct locking for ext4_end_io_nolock()Tao Ma
We must hold i_completed_io_lock when manipulating anything on the i_completed_io_list linked list. This includes io->lock, which we were checking in ext4_end_io_nolock(). So move this check to ext4_end_io_work(). This also has the bonus of avoiding extra work if it is already done without needing to take the mutex. Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-10-30Merge branches 'msm/dt', 'imx/dt' and 'at91/dt' into next/dtArnd Bergmann
2011-10-30mtd: tests: annotate as DANGEROUS in KconfigWolfram Sang
The tests may erase mtd devices, so annotate them as suggested per coding style and add a paragraph to the help text as well. Artem: amended the help test a bit. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@intel.com>
2011-10-30Merge branch 'pxa/fixes' into next/fixesArnd Bergmann
2011-10-30Merge branch 'pxa/devel' into next/devel2Arnd Bergmann
Conflicts: arch/arm/mach-s3c2416/s3c2416.c
2011-10-30Merge branch 'imx/fixes' into next/fixesArnd Bergmann
2011-10-31writeback: Add a 'reason' to wb_writeback_workCurt Wohlgemuth
This creates a new 'reason' field in a wb_writeback_work structure, which unambiguously identifies who initiates writeback activity. A 'wb_reason' enumeration has been added to writeback.h, to enumerate the possible reasons. The 'writeback_work_class' and tracepoint event class and 'writeback_queue_io' tracepoints are updated to include the symbolic 'reason' in all trace events. And the 'writeback_inodes_sbXXX' family of routines has had a wb_stats parameter added to them, so callers can specify why writeback is being started. Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Curt Wohlgemuth <curtw@google.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
2011-10-31writeback: send work item to queue_io, move_expired_inodesCurt Wohlgemuth
Instead of sending ->older_than_this to queue_io() and move_expired_inodes(), send the entire wb_writeback_work structure. There are other fields of a work item that are useful in these routines and in tracepoints. Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Curt Wohlgemuth <curtw@google.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
2011-10-31writeback: trace event balance_dirty_pagesWu Fengguang
Useful for analyzing the dynamics of the throttling algorithms and debugging user reported problems. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
2011-10-31writeback: trace event bdi_dirty_ratelimitWu Fengguang
It helps understand how various throttle bandwidths are updated. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
2011-10-30[S390] Remove error checking from copy_oldmem_page()Michael Holzheu
Currently it can happen that the pre-allocated ELF header contains a wrong memory map which would result in errors when copying /proc/vmcore. In order to still get a valid vmcore, we (temporarily) disable the error checking in copy_oldmem_page(). This will then produce zero pages for those memory regions. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] qdio: prevent dsci access without adapter interruptsJan Glauber
A kernel panic may occur during sending or receiving network packets on a machine without adapter interrupts since commit d36deae. The bug is triggered by writing to the shared indicator address which is set to 0 if the machine doesn't have adapter interrupts. Make the reading and setting of the shared indicator dependent on the adapter interrupt feature and while at it move the code to the file containing the adapter interrupt related code. Thanks to Jan Jaeger for tracking this down. Reported-by: Jan Jaeger <jan.jaeger@westnet.com.au> Tested-by: Jan Jaeger <jan.jaeger@westnet.com.au> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] irqstats: split IPI interrupt accountingHeiko Carstens
We use both the external call and emergency call IPIs to signal remote cpus. Therefore it makes sense to account them differently withing /proc/irqstats so we actually know what happened. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] add missing __tlb_flush_global() for !CONFIG_SMPJan Glauber
Fix this compiler error for !CONFIG_SMP: CC arch/s390/mm/pgtable.o arch/s390/mm/pgtable.c: In function ‘gmap_flush_tlb’: arch/s390/mm/pgtable.c:202:3: error: implicit declaration of function ‘__tlb_flush_global’ [-Werror=implicit-function-declaration] cc1: some warnings being treated as errors Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] sparse: fix sparse symbol shadow warningMartin Schwidefsky
to_kvmdev and dev_to_virtio both use container_of. Avoid to nest the two macros to quiet the following sparse warning: drivers/s390/kvm/kvm_virtio.c:337:20: warning: symbol '__mptr' shadows an earlier one drivers/s390/kvm/kvm_virtio.c:337:20: originally declared here Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] sparse: fix sparse NULL pointer warningsMartin Schwidefsky
Fix two NULL pointer warnings in the dasd driver: drivers/s390/block/dasd_eckd.c:2353:20: warning: Using plain integer as NULL pointer drivers/s390/block/dasd_eckd.c:2415:44: warning: Using plain integer as NULL pointer Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] sparse: fix sparse warnings with __user pointersMartin Schwidefsky
Use __force to quiet sparse warnings about user address space. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] sparse: fix sparse warnings in math-emuMartin Schwidefsky
Fix three sparse warnings in math-emu / sysinfo: arch/s390/kernel/sysinfo.c:448:17: error: return expression in void function arch/s390/kernel/sysinfo.c:445:25: warning: shift too big (32) for type unsigned int arch/s390/kernel/sysinfo.c:445:25: warning: shift too big (32) for type unsigned int Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] sparse: fix sparse warnings about missing prototypesMartin Schwidefsky
Add prototypes and includes for functions used in different modules. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] sparse: fix sparse ANSI-C warningsMartin Schwidefsky
Fix prototype of some functions in arch/s390/oprofile to avoid non-ANSI warnings from sparse. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] sparse: fix sparse static warningsMartin Schwidefsky
Make functions and data static to avoid sparse warnings. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] sparse: fix access past end of array warningsMartin Schwidefsky
Remove unnecessary code to avoid false positives from sparse, e.g. arch/s390/kernel/compat_signal.c:221:61: warning: invalid access past the end of 'set32' (8 8) Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] dasd: prevent path verification before resumeStefan Haberland
Mark the device as suspended and delay execution of the path verification worker to prevent mix-up. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] qdio: remove multicast pollingJan Glauber
The multicast poll check for the outbound queue is redundant since 3d6c76f "[S390] qdio: outbound tasklet scan threshold". Remove the check. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] qdio: reset outbound SBAL error statesJan Glauber
Don't leave outbound SBALs in error state after a target full condition. Reset the state to not initialized to make the error handling consistent across all types of errors. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] qdio: EQBS retry after CCQ 96Jan Glauber
Running under z/VM with QIOASSIST enabled, qdio queues could stall if EQBS did not extract all SBAL states. Add an instant retry for EQBS and, if the retry fails, set up a timer to ensure outstanding SBALs are processed later. While at it, optimize qdio_do_eqbs and qdio_do_sqbs to eliminate 3 jumps on the hot path. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] qdio: add timestamp for last queue scan timeJan Glauber
Add a timestamp per queue and update the timestamp when the queue is scanned. Add the queue timestamps and the timestamp of the last adapter interrupt to the debugfs output. The timestamps are useful for debugging stall conditions. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] Introduce get_clock_fast()Jan Glauber
Add get_clock_fast() which uses the slightly faster stckf if available. If stckf is not available fall back to stck, which has the same width. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] kvm: Handle diagnose 0x10 (release pages)Christian Borntraeger
Linux on System z uses a ballooner based on diagnose 0x10. (aka as collaborative memory management). This patch implements diagnose 0x10 on the guest address space. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] take mmap_sem when walking guest page tableCarsten Otte
gmap_fault needs to walk the guest page table. However, parts of that may change if some other thread does munmap. In that case gmap_unmap_notifier will also unmap the corresponding parts from the guest page table. We need to take mmap_sem in order to serialize these operations. do_exception now calls __gmap_fault with mmap_sem held which does not get exported to modules. The exported function, which is called from KVM, now takes mmap_sem. Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30[S390] fix list corruption in gmap reverse mappingCarsten Otte
This introduces locking via mm->page_table_lock to protect the rmap list for guest mappings from being corrupted by concurrent operations. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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