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2015-01-28staging: rtl8188eu: core: rtw_wlan_util.c: Fix for NULL dereferenceKumar Amit Mehta1-0/+2
In rtw_check_bcn_info(), check the return value of kzalloc() before dereferencing it, to avoid NULL pointer dereference. Signed-off-by: Kumar Amit Mehta <gmate.amit@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-28staging: rtl8712: remove useless printing lineHeba Aamer1-1/+0
This patch removes an unneeded call to printk. Signed-off-by: Heba Aamer <heba93aamer@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-28staging: unisys: rework signal remove/insert to avoid sparse lock warningsZachary Warren1-49/+54
Avoids the following warnings from sparse: visorchannel_funcs.c:457:9: warning: context imbalance in 'visorchannel_signalremove' - different lock contexts for basic block visorchannel_funcs.c:512:9: warning: context imbalance in 'visorchannel_signalinsert' - different lock contexts for basic These warnings are false positives. Sparse can't track conditional contexts. The change puts the lock/unlock into the same context by splitting the insert/remove functions each into a wrapper function that does locking if necessary and an inner function that does the insert/remove operation. Signed-off-by: Zachary Warren <conflatulence@gmail.com> Acked-by: Benjamin Romer <benjamin.romer@unisys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-28staging: lustre: lustre: mdc: lproc_mdc.c: Fix for potential NULL pointer dereferenceKumar Amit Mehta1-0/+2
In mdc_kuc_write(), OBD_ALLOC(lh, len) may leave 'lh' to NULL as kmalloc may fail to allocate memory. This fix adds a check to avoid, dereferencing a NULL pointer. Signed-off-by: Kumar Amit Mehta <gmate.amit@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-28staging: lustre: lustre: obdclass: obd_mount.c: Fix NULL dereferenceKumar Amit Mehta1-0/+5
OBD_ALLOC_PTR(uuid) invokes kmalloc, which may return NULL. This fix adds a check before dereferencing such pointer. Signed-off-by: Kumar Amit Mehta <gmate.amit@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-28staging: lustre: libcfs: nidstrings: Change type in printf format stringRickard Strandqvist1-5/+5
Wrong type in printf format string, requires 'unsigned int' but the argument type is 'int' This was found using a static code analysis program called cppcheck Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-28iio: vadc: Qualcomm SPMI PMIC voltage ADC driverStanimir Varbanov3-0/+1031
The voltage ADC is peripheral of Qualcomm SPMI PMIC chips. It has 15bits resolution and register space inside PMIC accessible across SPMI bus. The vadc driver registers itself through IIO interface. Signed-off-by: Stanimir Varbanov <svarbanov@mm-sol.com> Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-01-28clk: Remove __clk_registerTomeu Vizoso1-42/+0
As it has never been used. Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2015-01-28clk: Remove unneeded NULL checksTomeu Vizoso1-9/+0
As clk_unprepare_unused_subtree and clk_disable_unused_subtree are always called with a valid struct clk. Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2015-01-28clk: qoriq: Use pr_fmt()Emil Medve1-2/+5
Currently a mix of clk-qoriq/qoriq-clk and no prefix is used Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2015-01-28clk: qoriq: Replace kzalloc() with kmalloc()Emil Medve1-1/+1
Where the memset() is not necessary Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2015-01-28clk: qoriq: Make local symbol 'static'Emil Medve1-1/+1
drivers/clk/clk-qoriq.c:59:22: warning: symbol 'cmux_ops' was not declared. Should it be static? Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2015-01-28clk: qoriq: Fix checkpatch type OOM_MESSAGEEmil Medve1-12/+5
WARNING:OOM_MESSAGE: Possible unnecessary 'out of memory' message + if (!parent_names) { + pr_err("%s: could not allocate parent_names\n", __func__); WARNING:OOM_MESSAGE: Possible unnecessary 'out of memory' message + if (!cmux_clk) { + pr_err("%s: could not allocate cmux_clk\n", __func__); WARNING:OOM_MESSAGE: Possible unnecessary 'out of memory' message + if (!subclks) { + pr_err("%s: could not allocate subclks\n", __func__); WARNING:OOM_MESSAGE: Possible unnecessary 'out of memory' message + if (!onecell_data) { + pr_err("%s: could not allocate onecell_data\n", __func__); Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2015-01-28clk: qoriq: Fix checkpatch type ALLOC_SIZEOF_STRUCTEmil Medve1-2/+2
CHECK:ALLOC_SIZEOF_STRUCT: Prefer kzalloc(sizeof(*cmux_clk)...) over kzalloc(sizeof(struct cmux_clk)...) + cmux_clk = kzalloc(sizeof(struct cmux_clk), GFP_KERNEL); CHECK:ALLOC_SIZEOF_STRUCT: Prefer kzalloc(sizeof(*onecell_data)...) over kzalloc(sizeof(struct clk_onecell_data)...) + onecell_data = kzalloc(sizeof(struct clk_onecell_data), GFP_KERNEL); Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2015-01-28clk: qoriq: Fix checkpatch type ALLOC_WITH_MULTIPLYEmil Medve1-2/+2
WARNING:ALLOC_WITH_MULTIPLY: Prefer kcalloc over kzalloc with multiply + subclks = kzalloc(sizeof(struct clk *) * count, GFP_KERNEL); Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2015-01-28clk: qoriq: Fix checkpatch type PARENTHESIS_ALIGNMENTEmil Medve1-4/+4
CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis + rc = of_property_read_string_index(np, "clock-output-names", + 0, &clk_name); CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis + pr_err("Could not register clock provider for node:%s\n", + np->name); CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis + rc = of_property_read_string_index(np, "clock-output-names", + i, &clk_name); CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis + pr_err("Could not register clk provider for node:%s\n", + np->name); Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2015-01-28mtd: export new mtd_mmap_capabilitiesArnd Bergmann1-0/+1
The recently added mtd_mmap_capabilities can be used from loadable modules, in particular romfs, but is not exported, so we get ERROR: "mtd_mmap_capabilities" [fs/romfs/romfs.ko] undefined! This adds the missing export. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: b4caecd48005f ("fs: introduce f_op->mmap_capabilities for nommu mmap support") Acked-by: Christoph Hellwig <hch@lst.de> Acked-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2015-01-28regulator: da9211: Add gpio control for enable/disable of buckJames Ban1-0/+12
This is a patch for adding gpio control about enable/disable of buck. Signed-off-by: James Ban <james.ban.opensource@diasemi.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28spi: pl08x: do not select S3C64XX_PL080Arnd Bergmann1-1/+0
The pl08x driver originally selected S3C64XX_PL080 to avoid having the legacy Samsung DMA interfaces. Those are now gone, so the select is no longer needed, but it now causes problems when CONFIG_DMA_ENGINE is disabled: arch/arm/plat-samsung/built-in.o: In function `s3c64xx_spi0_set_platdata': :(.init.text+0x518): undefined reference to `pl08x_filter_id' This simply removes the 'select' to avoid this problem. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28spi/rockchip: avoid uninitialized-use warningArnd Bergmann1-2/+4
We currently get a warning about potentially uninitialized variables in the rockchip spi driver, at least in certain toolchain versions: spi/spi-rockchip.c: In function 'rockchip_spi_prepare_dma': include/linux/dmaengine.h:796:2: warning: 'txdesc' may be used uninitialized in this function include/linux/dmaengine.h:796:2: warning: 'rxdesc' may be used uninitialized in this function The reason seems to be that gcc cannot know whether the value of the rs->rx and rs->tx variables change between the two points these are accessed. The code is actually correct, but to make this clearer to the compiler, this changes the conditionals to test for the local rxdesc/txdesc variables instead, which it knows won't change. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28block: require blk_rq_prep_clone() be given an initialized clone requestKeith Busch1-0/+1
Prepare to allow blk_rq_prep_clone() to accept clone requests that were allocated from blk-mq request queues. As such the blk_rq_prep_clone() caller must first initialize the clone request. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2015-01-28drm/i915/skl: Enabling PSR on SkylakeSonika Jindal3-3/+31
Mainly taking care of some register offsets, otherwise things are similar to hsw. Also, programming ddi aux to use hardcoded values for psr data select. v2: introduce EDP_PSR_AUX_BASE macro (Chris) v3: Moving to HW tracking for SKL+ platforms, so activating source psr during psr_enabling and then avoiding psr entries and exits for each frontbuffer updates. v4: Using SKL DDI AUX regs instead of changing PSR_AUX regs definition (Rodrigo) Signed-off-by: Sonika Jindal <sonika.jindal@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> [danvet: Drop the hunks to short-circuit sw tracking: We'd need to push this down one level, and I don't fully trust the test coverage yet to do so. So much prefer we pick a whitelist approach for the cases we know work correctly.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-01-28Revert "drm/i915: Fix mutex->owner inspection race under DEBUG_MUTEXES"Chris Wilson1-1/+1
The core fix was applied in commit a63b03e2d2477586440741677ecac45bcf28d7b1 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Tue Jan 6 10:29:35 2015 +0000 mutex: Always clear owner field upon mutex_unlock() (note the absence of stable@ tag) so we can now revert our band-aid commit 226e5ae9e5f910 for -next. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-01-28drm/i915: Be consistent on printing seqnosMika Kuoppala1-4/+4
We have had %x and %u intermixed. Bring everything in line and use %x Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-01-28drm/i915: Display current hangcheck status in debugfsChris Wilson1-0/+36
For example, /sys/kernel/debug/dri/0/i915_hangcheck_info: Hangcheck active, fires in 15887800ms render ring: seqno = -4059 [current -583] action = 2 score = 0 ACTHD = 1ee8 [current 21f980] max ACTHD = 0 v2: Include expiration ETA. Can anyone spot a problem? v3: Convert for workqueued hangcheck (Mika) v4: Print seqnos as unsigned ints (Ville) v5: Print seqnos as hex (Chris) Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he@intel.com) (v2) Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> (v2) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-01-28drm/i915: Convert hangcheck from a timer into a delayed work itemChris Wilson5-18/+32
When run as a timer, i915_hangcheck_elapsed() must adhere to all the rules of running in a softirq context. This is advantageous to us as we want to minimise the risk that a driver bug will prevent us from detecting a hung GPU. However, that is irrelevant if the driver bug prevents us from resetting and recovering. Still it is prudent not to rely on mutexes inside the checker, but given the coarseness of dev->struct_mutex doing so is extremely hard. Give in and run from a work queue, i.e. outside of softirq. v2: Use own workqueue to avoid deadlocks (Daniel) Cleanup commit msg and add comment to i915_queue_hangcheck() (Chris) Cc: Jani Nikula <jani.nikula@intel.com> Cc: Daniel Vetter <dnaiel.vetter@ffwll.chm> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> (v1) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> [danvet: Remove accidental kerneldoc comment starter, to appease the 0 day builder.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-01-28UBI: Block: Explain usage of blk_rq_map_sg()Richard Weinberger1-0/+6
Signed-off-by: Richard Weinberger <richard@nod.at>
2015-01-28PCI: Fail MSI-X mappings if there's no space assigned to MSI-X BARYijing Wang1-0/+5
Unlike MSI, which is configured via registers in the MSI capability in Configuration Space, MSI-X is configured via tables in Memory Space. These MSI-X tables are mapped by a device BAR, and if no Memory Space has been assigned to the BAR, MSI-X cannot be used. Fail MSI-X setup if no space has been assigned for the BAR. Previously, we ioremapped the MSI-X table even if the resource hadn't been assigned. In this case, the resource address is undefined (and is often zero), which may lead to warnings or oopses in this path: pci_enable_msix msix_capability_init msix_map_region ioremap_nocache The PCI core sets resource flags to zero when it can't assign space for the resource (see reset_resource()). There are also some cases where it sets the IORESOURCE_UNSET flag, e.g., pci_reassigndev_resource_alignment(), pci_assign_resource(), etc. So we must check for both cases. [bhelgaas: changelog] Reported-by: Zhang Jukuo <zhangjukuo@huawei.com> Tested-by: Zhang Jukuo <zhangjukuo@huawei.com> Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2015-01-28UBI: fix soft lockup in ubi_check_volume()hujianyang1-0/+2
Running mtd-utils/tests/ubi-tests/io_basic.c could cause soft lockup or watchdog reset. It is because *updatevol* will perform ubi_check_volume() after updating finish and this function will full scan the updated lebs if the volume is initialized as STATIC_VOLUME. This patch adds *cond_resched()* in the loop of lebs scan to avoid soft lockup. Helped by Richard Weinberger <richard@nod.at> [ 2158.067096] INFO: rcu_sched self-detected stall on CPU { 1} (t=2101 jiffies g=1606 c=1605 q=56) [ 2158.172867] CPU: 1 PID: 2073 Comm: io_basic Tainted: G O 3.10.53 #21 [ 2158.172898] [<c000f624>] (unwind_backtrace+0x0/0x120) from [<c000c294>] (show_stack+0x10/0x14) [ 2158.172918] [<c000c294>] (show_stack+0x10/0x14) from [<c008ac3c>] (rcu_check_callbacks+0x1c0/0x660) [ 2158.172936] [<c008ac3c>] (rcu_check_callbacks+0x1c0/0x660) from [<c002b480>] (update_process_times+0x38/0x64) [ 2158.172953] [<c002b480>] (update_process_times+0x38/0x64) from [<c005ff38>] (tick_sched_handle+0x54/0x60) [ 2158.172966] [<c005ff38>] (tick_sched_handle+0x54/0x60) from [<c00601ac>] (tick_sched_timer+0x44/0x74) [ 2158.172978] [<c00601ac>] (tick_sched_timer+0x44/0x74) from [<c003f348>] (__run_hrtimer+0xc8/0x1b8) [ 2158.172992] [<c003f348>] (__run_hrtimer+0xc8/0x1b8) from [<c003fd9c>] (hrtimer_interrupt+0x128/0x2a4) [ 2158.173007] [<c003fd9c>] (hrtimer_interrupt+0x128/0x2a4) from [<c0246f1c>] (arch_timer_handler_virt+0x28/0x30) [ 2158.173022] [<c0246f1c>] (arch_timer_handler_virt+0x28/0x30) from [<c0086214>] (handle_percpu_devid_irq+0x9c/0x124) [ 2158.173036] [<c0086214>] (handle_percpu_devid_irq+0x9c/0x124) from [<c0082bd8>] (generic_handle_irq+0x20/0x30) [ 2158.173049] [<c0082bd8>] (generic_handle_irq+0x20/0x30) from [<c000969c>] (handle_IRQ+0x64/0x8c) [ 2158.173060] [<c000969c>] (handle_IRQ+0x64/0x8c) from [<c0008544>] (gic_handle_irq+0x3c/0x60) [ 2158.173074] [<c0008544>] (gic_handle_irq+0x3c/0x60) from [<c02f0f80>] (__irq_svc+0x40/0x50) [ 2158.173083] Exception stack(0xc4043c98 to 0xc4043ce0) [ 2158.173092] 3c80: c4043ce4 00000019 [ 2158.173102] 3ca0: 1f8a865f c050ad10 1f8a864c 00000031 c04b5970 0003ebce 00000000 f3550000 [ 2158.173113] 3cc0: bf00bc68 00000800 0003ebce c4043ce0 c0186d14 c0186cb8 80000013 ffffffff [ 2158.173130] [<c02f0f80>] (__irq_svc+0x40/0x50) from [<c0186cb8>] (read_current_timer+0x4/0x38) [ 2158.173145] [<c0186cb8>] (read_current_timer+0x4/0x38) from [<1f8a865f>] (0x1f8a865f) [ 2183.927097] BUG: soft lockup - CPU#1 stuck for 22s! [io_basic:2073] [ 2184.002229] Modules linked in: nandflash(O) [last unloaded: nandflash] Signed-off-by: Wang Kai <morgan.wang@huawei.com> Signed-off-by: hujianyang <hujianyang@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2015-01-28UBI: Fastmap: Care about the protection queueRichard Weinberger1-0/+13
Fastmap can miss a PEB if it is in the protection queue and not jet in the used tree. Treat every protected PEB as used. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2015-01-28UBI: do propagate positive error codes upArtem Bityutskiy1-0/+1
UBI uses positive function return codes internally, and should not propagate them up, except in the place this path fixes. Here is the original bug report from Dan Carpenter: The problem is really in ubi_eba_read_leb(). drivers/mtd/ubi/eba.c 412 err = ubi_io_read_vid_hdr(ubi, pnum, vid_hdr, 1); 413 if (err && err != UBI_IO_BITFLIPS) { 414 if (err > 0) { 415 /* 416 * The header is either absent or corrupted. 417 * The former case means there is a bug - 418 * switch to read-only mode just in case. 419 * The latter case means a real corruption - we 420 * may try to recover data. FIXME: but this is 421 * not implemented. 422 */ 423 if (err == UBI_IO_BAD_HDR_EBADMSG || 424 err == UBI_IO_BAD_HDR) { 425 ubi_warn("corrupted VID header at PEB %d, LEB %d:%d", 426 pnum, vol_id, lnum); 427 err = -EBADMSG; 428 } else 429 ubi_ro_mode(ubi); On this path we return UBI_IO_FF and UBI_IO_FF_BITFLIPS and it eventually gets passed to ERR_PTR(). We probably dereference the bad pointer and oops. At that point we've gone read only so it was already a bad situation... 430 } 431 goto out_free; 432 } else if (err == UBI_IO_BITFLIPS) 433 scrub = 1; 434 Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2015-01-28UBI: clean-up printing helpersArtem Bityutskiy1-4/+4
Let's prefix UBI messages with 'ubiX' instead of 'UBI-X' - this is more consistent with the way we name UBI devices. Also, commit "32608703 UBI: Extend UBI layer debug/messaging capabilities" added the function name print to 'ubi_msg()' - lets revert this change, since these messages are supposed to be just informative messages, and not debugging messages. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2015-01-28UBI: extend UBI layer debug/messaging capabilities - cosmeticsTanya Brokhman5-22/+13
Some cosmetic fixes to the patch "UBI: Extend UBI layer debug/messaging capabilities". Signed-off-by: Tanya Brokhman <tlinder@codeaurora.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2015-01-28UBI: Block: Add blk-mq supportRichard Weinberger1-108/+94
Convert the driver to blk-mq. Beside of moving to the modern block interface this change boosts also the performance of the driver. nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda nand: Micron NAND 256MiB 3,3V 8-bit nand: 256MiB, SLC, page size: 2048, OOB size: 64 root@debian-armhf:~# dd if=/dev/ubiblock0_0 of=/dev/zero bs=1M 243+1 records in 243+1 records out 255080448 bytes (255 MB) copied, 4.39295 s, 58.1 MB/s vs. root@debian-armhf:~# dd if=/dev/ubiblock0_0 of=/dev/zero bs=1M 243+1 records in 243+1 records out 255080448 bytes (255 MB) copied, 2.87676 s, 88.7 MB/s Cc: hch@infradead.org Cc: axboe@fb.com Cc: tom.leiming@gmail.com Signed-off-by: Richard Weinberger <richard@nod.at> Tested-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Reviewed-by: Jens Axboe <axboe@fb.com> Acked-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
2015-01-28UBI: Add initial support for scatter gatherRichard Weinberger3-15/+138
Adds a new set of functions to deal with scatter gather. ubi_eba_read_leb_sg() will read from a LEB into a scatter gather list. The new data structure struct ubi_sgl will be used within UBI to hold the scatter gather list itself and metadata to have a cursor within the list. Signed-off-by: Richard Weinberger <richard@nod.at> Tested-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
2015-01-28dm thin: don't allow messages to be sent to a pool target in READ_ONLY or FAIL modeJoe Thornber1-0/+6
You can't modify the metadata in these modes. It's better to fail these messages immediately than let the block-manager deny write locks on metadata blocks. Otherwise these failed metadata changes will trigger 'needs_check' to get set in the metadata superblock -- requiring repair using the thin_check utility. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org
2015-01-28dm cache: fix missing ERR_PTR returns and handlingJoe Thornber1-4/+5
Commit 9b1cc9f251 ("dm cache: share cache-metadata object across inactive and active DM tables") mistakenly ignored the use of ERR_PTR returns. Restore missing IS_ERR checks and ERR_PTR returns where appropriate. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org
2015-01-28UBI: rename_volumes: Use UBI_METAONLYRichard Weinberger1-1/+1
By using UBI_METAONLY in rename_volumes() it is now possible to rename an UBI volume atomically while it is open for writing. This is useful for firmware upgrades. Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Cc: Andrew Murray <amurray@embedded-bits.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at> Tested-by: Guido Martínez <guido@vanguardiasur.com.ar> Reviewed-by: Guido Martínez <guido@vanguardiasur.com.ar> Tested-by: Christoph Fritz <chf.fritz@googlemail.com> Tested-by: Andrew Murray <amurray@embedded-bits.co.uk>
2015-01-28UBI: Implement UBI_METAONLYRichard Weinberger3-7/+24
UBI_METAONLY is a new open mode for UBI volumes, it indicates that only meta data is being changed. Meta data in terms of UBI volumes means data which is stored in the UBI volume table but not on the volume itself. While it does not interfere with UBI_READONLY and UBI_READWRITE it is not allowed to use UBI_METAONLY together with UBI_EXCLUSIVE. Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Cc: Andrew Murray <amurray@embedded-bits.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at> Tested-by: Guido Martínez <guido@vanguardiasur.com.ar> Reviewed-by: Guido Martínez <guido@vanguardiasur.com.ar> Tested-by: Christoph Fritz <chf.fritz@googlemail.com> Tested-by: Andrew Murray <amurray@embedded-bits.co.uk>
2015-01-28clk: samsung: exynos4: Add divider clock id for memory bus frequencyChanwoo Choi1-5/+5
This patch adds the divider clock id for Exynos4 memory bus frequency. The clock id is used for DVFS (Dynamic Voltage/Frequency Scaling) feature of the exynos memory bus. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
2015-01-28power_supply: 88pm860x: Fix leaked power supply on probe failKrzysztof Kozlowski1-0/+1
Driver forgot to unregister power supply if request_threaded_irq() failed in probe(). In such case the memory associated with power supply leaked. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Fixes: a830d28b48bf ("power_supply: Enable battery-charger for 88pm860x") Cc: <stable@vger.kernel.org> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-01-28xen/gntdev: provide find_special_page VMA operationDavid Vrabel1-0/+11
For a PV guest, use the find_special_page op to find the right page. To handle VMAs being split, remember the start of the original VMA so the correct index in the pages array can be calculated. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2015-01-28xen/gntdev: mark userspace PTEs as special on x86 PV guestsDavid Vrabel1-0/+34
In an x86 PV guest, get_user_pages_fast() on a userspace address range containing foreign mappings does not work correctly because the M2P lookup of the MFN from a userspace PTE may return the wrong page. Force get_user_pages_fast() to fail on such addresses by marking the PTEs as special. If Xen has XENFEAT_gnttab_map_avail_bits (available since at least 4.0), we can do so efficiently in the grant map hypercall. Otherwise, it needs to be done afterwards. This is both inefficient and racy (the mapping is visible to the task before we fixup the PTEs), but will be fine for well-behaved applications that do not use the mapping until after the mmap() system call returns. Guests with XENFEAT_auto_translated_physmap (ARM and x86 HVM or PVH) do not need this since get_user_pages() has always worked correctly for them. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2015-01-28xen-blkback: safely unmap grants in case they are still in useJennifer Herbert2-50/+122
Use gnttab_unmap_refs_async() to wait until the mapped pages are no longer in use before unmapping them. This allows blkback to use network storage which may retain refs to pages in queued skbs after the block I/O has completed. Signed-off-by: Jennifer Herbert <jennifer.herbert@citrix.com> Acked-by: Roger Pau Monné <roger.pau@citrix.com> Acked-by: Jens Axboe <axboe@kernel.de> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-01-28xen/gntdev: safely unmap grants in case they are still in useJennifer Herbert1-5/+31
Use gnttab_unmap_refs_async() to wait until the mapped pages are no longer in use before unmapping them. This allows userspace programs to safely use Direct I/O and AIO to a network filesystem which may retain refs to pages in queued skbs after the filesystem I/O has completed. Signed-off-by: Jennifer Herbert <jennifer.herbert@citrix.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-01-28xen/gntdev: convert priv->lock to a mutexDavid Vrabel1-20/+20
Unmapping may require sleeping and we unmap while holding priv->lock, so convert it to a mutex. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2015-01-28xen/grant-table: add a mechanism to safely unmap pages that are in useJennifer Herbert1-0/+44
Introduce gnttab_unmap_refs_async() that can be used to safely unmap pages that may be in use (ref count > 1). If the pages are in use the unmap is deferred and retried later. This polling is not very clever but it should be good enough if the cases where the delay is necessary are rare. The initial delay is 5 ms and is increased linearly on each subsequent retry (to reduce load if the page is in use for a long time). This is needed to allow block backends using grant mapping to safely use network storage (block or filesystem based such as iSCSI or NFS). The network storage driver may complete a block request whilst there is a queued network packet retry (because the ack from the remote end races with deciding to queue the retry). The pages for the retried packet would be grant unmapped and the network driver (or hardware) would access the unmapped page. Signed-off-by: Jennifer Herbert <jennifer.herbert@citrix.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-01-28xen-netback: use foreign page information from the pages themselvesJennifer Herbert1-91/+9
Use the foreign page flag in netback to get the domid and grant ref needed for the grant copy. This signficiantly simplifies the netback code and makes netback work with foreign pages from other backends (e.g., blkback). This allows blkback to use iSCSI disks provided by domUs running on the same host. Signed-off-by: Jennifer Herbert <jennifer.herbert@citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-01-28xen: mark grant mapped pages as foreignJennifer Herbert1-2/+41
Use the "foreign" page flag to mark pages that have a grant map. Use page->private to store information of the grant (the granting domain and the grant reference). Signed-off-by: Jennifer Herbert <jennifer.herbert@citrix.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-01-28xen/grant-table: add helpers for allocating pagesDavid Vrabel5-13/+41
Add gnttab_alloc_pages() and gnttab_free_pages() to allocate/free pages suitable to for granted maps. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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