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1af36b2a99
linux-next/drivers/mmc/host
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Lauri Hintsala 1af36b2a99 mmc: mxs-mmc: fix deadlock in SDIO IRQ case 
Release the lock before mmc_signal_sdio_irq is called by mxs_mmc_irq_handler.

Backtrace:
[   79.660000] =============================================
[   79.660000] [ INFO: possible recursive locking detected ]
[   79.660000] 3.4.0-00009-g3e96082-dirty #11 Not tainted
[   79.660000] ---------------------------------------------
[   79.660000] swapper/0 is trying to acquire lock:
[   79.660000]  (&(&host->lock)->rlock#2){-.....}, at: [<c026ea3c>] mxs_mmc_enable_sdio_irq+0x18/0xd4
[   79.660000]
[   79.660000] but task is already holding lock:
[   79.660000]  (&(&host->lock)->rlock#2){-.....}, at: [<c026f744>] mxs_mmc_irq_handler+0x1c/0xe8
[   79.660000]
[   79.660000] other info that might help us debug this:
[   79.660000]  Possible unsafe locking scenario:
[   79.660000]
[   79.660000]        CPU0
[   79.660000]        ----
[   79.660000]   lock(&(&host->lock)->rlock#2);
[   79.660000]   lock(&(&host->lock)->rlock#2);
[   79.660000]
[   79.660000]  *** DEADLOCK ***
[   79.660000]
[   79.660000]  May be due to missing lock nesting notation
[   79.660000]
[   79.660000] 1 lock held by swapper/0:
[   79.660000]  #0:  (&(&host->lock)->rlock#2){-.....}, at: [<c026f744>] mxs_mmc_irq_handler+0x1c/0xe8
[   79.660000]
[   79.660000] stack backtrace:
[   79.660000] [<c0014bd0>] (unwind_backtrace+0x0/0xf4) from [<c005f9c0>] (__lock_acquire+0x1948/0x1d48)
[   79.660000] [<c005f9c0>] (__lock_acquire+0x1948/0x1d48) from [<c005fea0>] (lock_acquire+0xe0/0xf8)
[   79.660000] [<c005fea0>] (lock_acquire+0xe0/0xf8) from [<c03a8460>] (_raw_spin_lock_irqsave+0x44/0x58)
[   79.660000] [<c03a8460>] (_raw_spin_lock_irqsave+0x44/0x58) from [<c026ea3c>] (mxs_mmc_enable_sdio_irq+0x18/0xd4)
[   79.660000] [<c026ea3c>] (mxs_mmc_enable_sdio_irq+0x18/0xd4) from [<c026f7fc>] (mxs_mmc_irq_handler+0xd4/0xe8)
[   79.660000] [<c026f7fc>] (mxs_mmc_irq_handler+0xd4/0xe8) from [<c006bdd8>] (handle_irq_event_percpu+0x70/0x254)
[   79.660000] [<c006bdd8>] (handle_irq_event_percpu+0x70/0x254) from [<c006bff8>] (handle_irq_event+0x3c/0x5c)
[   79.660000] [<c006bff8>] (handle_irq_event+0x3c/0x5c) from [<c006e6d0>] (handle_level_irq+0x90/0x110)
[   79.660000] [<c006e6d0>] (handle_level_irq+0x90/0x110) from [<c006b930>] (generic_handle_irq+0x38/0x50)
[   79.660000] [<c006b930>] (generic_handle_irq+0x38/0x50) from [<c00102fc>] (handle_IRQ+0x30/0x84)
[   79.660000] [<c00102fc>] (handle_IRQ+0x30/0x84) from [<c000f058>] (__irq_svc+0x38/0x60)
[   79.660000] [<c000f058>] (__irq_svc+0x38/0x60) from [<c0010520>] (default_idle+0x2c/0x40)
[   79.660000] [<c0010520>] (default_idle+0x2c/0x40) from [<c0010a90>] (cpu_idle+0x64/0xcc)
[   79.660000] [<c0010a90>] (cpu_idle+0x64/0xcc) from [<c04ff858>] (start_kernel+0x244/0x2c8)
[   79.660000] BUG: spinlock lockup on CPU#0, swapper/0
[   79.660000]  lock: c398cb2c, .magic: dead4ead, .owner: swapper/0, .owner_cpu: 0
[   79.660000] [<c0014bd0>] (unwind_backtrace+0x0/0xf4) from [<c01ddb1c>] (do_raw_spin_lock+0xf0/0x144)
[   79.660000] [<c01ddb1c>] (do_raw_spin_lock+0xf0/0x144) from [<c03a8468>] (_raw_spin_lock_irqsave+0x4c/0x58)
[   79.660000] [<c03a8468>] (_raw_spin_lock_irqsave+0x4c/0x58) from [<c026ea3c>] (mxs_mmc_enable_sdio_irq+0x18/0xd4)
[   79.660000] [<c026ea3c>] (mxs_mmc_enable_sdio_irq+0x18/0xd4) from [<c026f7fc>] (mxs_mmc_irq_handler+0xd4/0xe8)
[   79.660000] [<c026f7fc>] (mxs_mmc_irq_handler+0xd4/0xe8) from [<c006bdd8>] (handle_irq_event_percpu+0x70/0x254)
[   79.660000] [<c006bdd8>] (handle_irq_event_percpu+0x70/0x254) from [<c006bff8>] (handle_irq_event+0x3c/0x5c)
[   79.660000] [<c006bff8>] (handle_irq_event+0x3c/0x5c) from [<c006e6d0>] (handle_level_irq+0x90/0x110)
[   79.660000] [<c006e6d0>] (handle_level_irq+0x90/0x110) from [<c006b930>] (generic_handle_irq+0x38/0x50)
[   79.660000] [<c006b930>] (generic_handle_irq+0x38/0x50) from [<c00102fc>] (handle_IRQ+0x30/0x84)
[   79.660000] [<c00102fc>] (handle_IRQ+0x30/0x84) from [<c000f058>] (__irq_svc+0x38/0x60)
[   79.660000] [<c000f058>] (__irq_svc+0x38/0x60) from [<c0010520>] (default_idle+0x2c/0x40)
[   79.660000] [<c0010520>] (default_idle+0x2c/0x40) from [<c0010a90>] (cpu_idle+0x64/0xcc)
[   79.660000] [<c0010a90>] (cpu_idle+0x64/0xcc) from [<c04ff858>] (start_kernel+0x244/0x2c8)

Signed-off-by: Lauri Hintsala <lauri.hintsala@bluegiga.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-09-04 13:58:05 -04:00
..
at91_mci.c ARM: at91: code removal of CAP9 SoC 2012-02-03 13:33:05 +01:00
at91_mci.h mmc: at91_mci: move register header from include/ to drivers/ 2011-07-21 10:35:08 -04:00
atmel-mci-regs.h mmc: atmel-mci: fix burst/chunk size modification 2012-06-06 08:52:12 -04:00
atmel-mci.c mmc: atmel-mci: modify CLKDIV displaying in debugfs 2012-07-22 15:25:50 -04:00
au1xmmc.c MIPS: Alchemy: Au1300 SoC support 2011-12-07 22:02:05 +00:00
bfin_sdh.c mmc: bfin_sdh: fix dma_desc_array build error 2012-09-04 13:58:04 -04:00
cb710-mmc.c mmc: convert drivers/mmc/host/* to use module_platform_driver() 2012-01-11 23:58:42 -05:00
cb710-mmc.h
davinci_mmc.c mmc: davinci_mmc: set MODULE_ALIAS to allow autoloading 2012-04-22 11:16:58 -04:00
dw_mmc-pci.c mmc: Support of PCI mode in the dw_mmc driver 2012-03-25 19:33:44 -04:00
dw_mmc-pltfm.c mmc: Support of PCI mode in the dw_mmc driver 2012-03-25 19:33:44 -04:00
dw_mmc.c mmc: dw_mmc: Fix null dma_ops access when use_dma is false 2012-07-21 00:02:09 -04:00
dw_mmc.h mmc: Support of PCI mode in the dw_mmc driver 2012-03-25 19:33:44 -04:00
jz4740_mmc.c mmc: convert drivers/mmc/host/* to use module_platform_driver() 2012-01-11 23:58:42 -05:00
Kconfig mmc: at91-mci: this driver is now deprecated 2012-05-17 14:33:48 -04:00
Makefile mmc: remove imxmmc driver 2012-04-22 11:17:25 -04:00
mmc_spi.c mmc: Remove redundant spi driver bus initialization 2012-01-11 23:58:42 -05:00
mmci.c ARM: 7427/1: mmc: mmci: Defer probe() in case of yet uninitialized GPIOs 2012-06-17 22:24:36 +01:00
mmci.h ARM: 7280/1: mmc: mmci: Cache MMCICLOCK and MMCIPOWER register 2012-02-02 17:02:15 +00:00
msm_sdcc.c mmc: remove the second argument of k[un]map_atomic() 2012-01-11 23:58:42 -05:00
msm_sdcc.h mmc: msm_sdcc: Use MCI_INT_MASK0 for PIO interrupts 2011-10-26 15:43:37 -04:00
mvsdio.c ARM: Orion: fix driver probe error handling with respect to clk 2012-07-25 17:06:21 +02:00
mvsdio.h
mxcmmc.c mmc mxcmmc: do not depend on grouped clocks 2012-04-25 17:03:38 +02:00
mxs-mmc.c mmc: mxs-mmc: fix deadlock in SDIO IRQ case 2012-09-04 13:58:05 -04:00
of_mmc_spi.c mmc: of_mmc_spi: fix little endian support 2012-02-13 20:38:58 -05:00
omap_hsmmc.c Merge branch 'dmaengine' of git://git.linaro.org/people/rmk/linux-arm 2012-08-01 16:41:07 -07:00
omap.c mmc: omap: remove private DMA API implementation 2012-07-31 12:06:23 +01:00
pxamci.c mmc: convert drivers/mmc/host/* to use module_platform_driver() 2012-01-11 23:58:42 -05:00
pxamci.h
s3cmci.c mmc: s3cmci: Convert s3cmci driver to gpiolib API 2012-07-22 15:25:44 -04:00
s3cmci.h
sdhci-cns3xxx.c mmc: convert drivers/mmc/host/* to use module_platform_driver() 2012-01-11 23:58:42 -05:00
sdhci-dove.c mmc: sdhci-dove: Prepare for common clock framework 2012-07-22 16:42:48 -04:00
sdhci-esdhc-imx.c mmc: esdhc: Fix DMA_MASK to not break mx25 DMA access 2012-07-22 16:42:30 -04:00
sdhci-esdhc.h mmc: sdhci-esdhc: Change delay after setting clock from 100ms to 1ms 2012-01-11 23:58:41 -05:00
sdhci-of-esdhc.c mmc: esdhc: Workaround for data crc error on p1010rdb 2012-03-25 19:33:45 -04:00
sdhci-of-hlwd.c mmc: convert drivers/mmc/host/* to use module_platform_driver() 2012-01-11 23:58:42 -05:00
sdhci-pci-data.c mmc: sdhci-pci: add platform data 2012-01-11 23:58:47 -05:00
sdhci-pci.c mmc: sdhci-pci: CaFe has broken card detection 2012-07-22 15:25:46 -04:00
sdhci-pltfm.c mmc: dt: Consolidate DT bindings 2012-05-15 13:29:42 +02:00
sdhci-pltfm.h mmc: sdhci: remove "state" argument from sdhci_suspend_host 2011-12-19 15:50:11 -08:00
sdhci-pxav2.c mmc: sdhci-pxa: Add device tree support 2012-07-21 00:01:47 -04:00
sdhci-pxav3.c mmc: sdhci-pxa: Add device tree support 2012-07-21 00:01:47 -04:00
sdhci-s3c.c mmc: sdhci-s3c: pass IRQF ONESHOT to request threaded irq 2012-06-06 09:53:22 -04:00
sdhci-spear.c Viresh has moved 2012-06-20 14:39:36 -07:00
sdhci-tegra.c Merge branch 'for-3.6/common-clk' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/clk 2012-07-06 22:21:23 +02:00
sdhci.c mmc: sd: Fix sd current limit setting 2012-07-22 15:25:52 -04:00
sdhci.h mmc: sdhci: if MAX_CURRENT is 0, try getting current from regulator 2012-07-21 00:02:22 -04:00
sdricoh_cs.c mmc: Add module.h to drivers/mmc users assuming implicit presence. 2011-10-26 16:32:19 -04:00
sh_mmcif.c Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2012-07-24 17:12:54 -07:00
sh_mobile_sdhi.c Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2012-07-24 17:12:54 -07:00
tifm_sd.c Autogenerated GPG tag for Rusty D1ADB8F1: 15EE 8D6C AB0E 7F0C F999 BFCB D920 0E6C D1AD B8F1 2012-01-14 12:32:16 -08:00
tmio_mmc_dma.c Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2012-03-29 15:34:57 -07:00
tmio_mmc_pio.c mmc: tmio: use generic GPIO CD and WP handlers 2012-07-21 00:02:20 -04:00
tmio_mmc.c mmc: convert drivers/mmc/host/* to use module_platform_driver() 2012-01-11 23:58:42 -05:00
tmio_mmc.h mmc: tmio_mmc: remove unused sdio_irq_enabled flag 2012-03-27 12:20:17 -04:00
ushc.c USB: convert some miscellanies drivers to use module_usb_driver() 2011-11-18 09:52:10 -08:00
via-sdmmc.c mmc: replace printk with appropriate display macro 2011-10-26 16:32:22 -04:00
vub300.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
wbsd.c mmc: replace printk with appropriate display macro 2011-10-26 16:32:22 -04:00
wbsd.h