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Dong Aisheng f6a9964952 can: m_can: fix possible sleep in napi poll 
The m_can_get_berr_counter function can sleep and it may be called in napi poll
function. Rework it to fix the following warning.

root@imx6qdlsolo:~# cangen can0 -f -L 12 -D 112233445566778899001122
[ 1846.017565] m_can 20e8000.can can0: entered error warning state
[ 1846.023551] ------------[ cut here ]------------
[ 1846.028216] WARNING: CPU: 0 PID: 560 at kernel/locking/mutex.c:867 mutex_trylock+0x218/0x23c()
[ 1846.036889] DEBUG_LOCKS_WARN_ON(in_interrupt())
[ 1846.041263] Modules linked in:
[ 1846.044594] CPU: 0 PID: 560 Comm: cangen Not tainted 3.17.0-rc4-next-20140915-00010-g032d018-dirty #477
[ 1846.054033] Backtrace:
[ 1846.056557] [<80012448>] (dump_backtrace) from [<80012728>] (show_stack+0x18/0x1c)
[ 1846.064180]  r6:809a07ec r5:809a07ec r4:00000000 r3:00000000
[ 1846.069966] [<80012710>] (show_stack) from [<806c9ee0>] (dump_stack+0x8c/0xa4)
[ 1846.077264] [<806c9e54>] (dump_stack) from [<8002aa78>] (warn_slowpath_common+0x70/0x94)
[ 1846.085403]  r6:806cd1b0 r5:00000009 r4:be1d5c20 r3:be07b0c0
[ 1846.091204] [<8002aa08>] (warn_slowpath_common) from [<8002aad4>] (warn_slowpath_fmt+0x38/0x40)
[ 1846.099951]  r8:8119106c r7:80515aa4 r6:be027000 r5:00000001 r4:809d1df4
[ 1846.106830] [<8002aaa0>] (warn_slowpath_fmt) from [<806cd1b0>] (mutex_trylock+0x218/0x23c)
[ 1846.115141]  r3:80851c88 r2:8084fb74
[ 1846.118804] [<806ccf98>] (mutex_trylock) from [<80515aa4>] (clk_prepare_lock+0x14/0xf4)
[ 1846.126859]  r8:00000040 r7:be1d5cec r6:be027000 r5:be255800 r4:be027000
[ 1846.133737] [<80515a90>] (clk_prepare_lock) from [<80517660>] (clk_prepare+0x14/0x2c)
[ 1846.141583]  r5:be255800 r4:be027000
[ 1846.145272] [<8051764c>] (clk_prepare) from [<8041ff14>] (m_can_get_berr_counter+0x20/0xd4)
[ 1846.153672]  r4:be255800 r3:be07b0c0
[ 1846.157325] [<8041fef4>] (m_can_get_berr_counter) from [<80420428>] (m_can_poll+0x310/0x8fc)
[ 1846.165809]  r7:bd4dc540 r6:00000744 r5:11300000 r4:be255800
[ 1846.171590] [<80420118>] (m_can_poll) from [<8056a468>] (net_rx_action+0xcc/0x1b4)
[ 1846.179204]  r10:00000101 r9:be255ebc r8:00000040 r7:be7c3208 r6:8097c100 r5:be7c3200
[ 1846.187192]  r4:0000012c
[ 1846.189779] [<8056a39c>] (net_rx_action) from [<8002deec>] (__do_softirq+0xfc/0x2c4)
[ 1846.197568]  r10:00000101 r9:8097c088 r8:00000003 r7:8097c080 r6:40000001 r5:8097c08c
[ 1846.205559]  r4:00000020
[ 1846.208144] [<8002ddf0>] (__do_softirq) from [<8002e194>] (do_softirq+0x7c/0x88)
[ 1846.215588]  r10:00000000 r9:bd516a60 r8:be18ce00 r7:00000000 r6:be255800 r5:8056c0ec
[ 1846.223578]  r4:60000093
[ 1846.226163] [<8002e118>] (do_softirq) from [<8002e288>] (__local_bh_enable_ip+0xe8/0x10c)
[ 1846.234386]  r4:00000200 r3:be1d4000
[ 1846.238036] [<8002e1a0>] (__local_bh_enable_ip) from [<8056c108>] (__dev_queue_xmit+0x314/0x6b0)
[ 1846.246868]  r6:be255800 r5:bd516a00 r4:00000000 r3:be07b0c0
[ 1846.252645] [<8056bdf4>] (__dev_queue_xmit) from [<8056c4b8>] (dev_queue_xmit+0x14/0x18)

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2014-11-18 21:35:03 +01:00
..
accessibility
acpi Merge branches 'acpi-scan' and 'acpi-ec' 2014-10-31 22:24:44 +01:00
amba PM / Domains: Move dev_pm_domain_attach|detach() to pm_domain.h 2014-09-30 01:16:44 +02:00
ata Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2014-10-18 18:11:04 -07:00
atm atm: simplify lanai.c by using module_pci_driver 2014-10-17 11:55:32 -04:00
auxdisplay
base tiny: rename ENABLE_DEV_COREDUMP to ALLOW_DEV_COREDUMP 2014-11-07 11:07:35 -08:00
bcma bcma: add another PCI ID of device with BCM43228 2014-10-23 14:02:06 -04:00
block zram: avoid kunmap_atomic() of a NULL pointer 2014-11-13 16:17:05 -08:00
bluetooth Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-10-13 11:28:42 +02:00
bus ARM: SoC driver updates for 3.18 2014-10-08 17:37:16 -04:00
cdrom
char virtio: bugfix for 3.18 2014-11-13 18:07:52 -08:00
clk The clk tree changes for 3.18 are dominated by clock drivers. Mostly 2014-10-15 07:05:03 +02:00
clocksource ARM/ARM64: arch-timer: fix arch_timer_probed logic 2014-10-26 20:50:00 +01:00
connector
cpufreq cpufreq: cpufreq-dt: Restore default cpumask_setall(policy->cpus) 2014-10-27 23:27:35 +01:00
cpuidle Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-10-24 12:48:47 -07:00
crypto crypto: caam - fix missing dma unmap on error path 2014-11-06 23:10:20 +08:00
dca
devfreq PM / devfreq: exynos: Enable building exynos PPMU as module 2014-09-29 20:22:36 +09:00
dio
dma dma: edma: move device registration to platform code 2014-11-05 18:26:10 -08:00
dma-buf dma-buf: don't open-code atomic_long_read() 2014-10-09 02:39:07 -04:00
edac e7xxx_edac: Report CE events properly 2014-10-22 22:59:00 +02:00
eisa
extcon
firewire
firmware Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-10-23 14:45:09 -07:00
fmc
gpio This is the bulk of GPIO changes for the v3.18 development 2014-10-09 14:58:15 -04:00
gpu Merge tag 'drm-intel-fixes-2014-11-07' of git://anongit.freedesktop.org/drm-intel into drm-fixes 2014-11-10 10:05:37 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2014-11-13 16:19:14 -08:00
hsi
hv
hwmon hwmon: (fam15h_power) Fix NB device ID for F16h M30h 2014-11-11 10:39:45 -08:00
hwspinlock
i2c i2c: core: Dispose OF IRQ mapping at client removal time 2014-11-07 19:03:18 +01:00
ide Merge branch 'for-3.18/drivers' of git://git.kernel.dk/linux-block 2014-10-18 12:12:45 -07:00
idle
iio iio: as3935: allocate correct iio_device size 2014-11-05 18:33:46 +00:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-10-31 15:04:58 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-10-31 19:51:11 -07:00
iommu IOMMU Updates for Linux v3.18 2014-10-15 07:23:49 +02:00
ipack
irqchip irqchip: armada-370-xp: Fix MPIC interrupt handling 2014-11-02 01:31:10 +00:00
isdn isdn/gigaset: fix usb_gigaset write_cmd result race 2014-10-14 15:05:35 -04:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2014-10-21 08:18:38 -07:00
lguest
macintosh
mailbox Merge branch 'mailbox-for-linus' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2014-10-21 11:21:19 -07:00
mcb
md . stable fix for dm-thin that avoids normal IO racing with discard 2014-11-13 09:19:20 -08:00
media [media] sp2: sp2_init() can be static 2014-11-03 19:08:06 -02:00
memory
memstick memstick: r592: fix build warnings for !PM_SLEEP 2014-10-14 02:18:22 +02:00
message SCSI for-linus on 20141007 2014-10-07 21:29:18 -04:00
mfd mfd: twl4030-power: Fix poweroff with PM configuration enabled 2014-11-10 15:22:04 +00:00
misc cxl: Fix PSL error due to duplicate segment table entries 2014-10-28 19:52:52 +11:00
mmc mmc: core: fix card detection regression 2014-11-05 09:28:48 +01:00
mtd Three main MTD fixes for 3.18: 2014-11-02 14:45:52 -08:00
net can: m_can: fix possible sleep in napi poll 2014-11-18 21:35:03 +01:00
nfc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2014-10-07 14:48:29 -04:00
ntb ntb: Adding split BAR support for Haswell platforms 2014-10-17 07:08:51 -04:00
nubus
of of: Fix overflow bug in string property parsing functions 2014-11-04 10:19:48 +00:00
oprofile
parisc Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-10-13 16:23:15 +02:00
parport
pci PCI updates for v3.18: 2014-10-31 18:48:29 -07:00
pcmcia
phy phy: omap-usb2: Enable runtime PM of omap-usb2 phy properly 2014-11-05 14:34:06 -08:00
pinctrl pinctrl: baytrail: show output gpio state correctly on Intel Baytrail 2014-10-28 11:16:26 +01:00
platform quirk for Lenovo Yoga 3: no rfkill switch 2014-10-27 21:45:13 -07:00
pnp PNP: replace strnicmp with strncasecmp 2014-10-14 02:18:25 +02:00
power power: reset: at91-reset: fix power down register 2014-10-22 10:08:22 +02:00
powercap
pps
ps3
ptp
pwm pwm: Changes for v3.18-rc1 2014-10-21 08:17:43 -07:00
rapidio
ras
regulator Merge remote-tracking branches 'regulator/fix/max1586', 'regulator/fix/max77686', 'regulator/fix/max77693', 'regulator/fix/max77802', 'regulator/fix/max8860' and 'regulator/fix/s2mpa01' into regulator-linus 2014-11-05 14:59:25 +00:00
remoteproc
reset
rpmsg
rtc drivers/rtc/rtc-bq32k.c: fix register value 2014-10-29 16:33:14 -07:00
s390 KVM: s390: virtio_ccw: remove unused variable 2014-11-03 10:43:00 +01:00
sbus
scsi libcxgbi : support ipv6 address host_param 2014-10-28 09:57:00 +01:00
sfi
sh
sn
soc soc: versatile: Add terminating entry for realview_soc_of_match 2014-10-28 22:05:07 +01:00
spi Merge remote-tracking branches 'spi/fix/fsl-dspi' and 'spi/fix/pxa2xx' into spi-linus 2014-11-06 12:58:46 +00:00
spmi
ssb This is the bulk of GPIO changes for the v3.18 development 2014-10-09 14:58:15 -04:00
staging Second round of IIO fixes for the 3.18 cycle. 2014-11-05 11:30:45 -08:00
target Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2014-10-21 13:06:38 -07:00
tc
thermal imx: thermal: imx_get_temp might be called before sensor clock is prepared 2014-11-09 15:42:53 -04:00
thunderbolt
tty tty: Fix pty master poll() after slave closes v2 2014-11-06 12:23:36 -08:00
uio uio: Export definition of struct uio_device 2014-10-02 21:35:54 -07:00
usb USB: cdc-acm: add quirk for control-line state requests 2014-11-06 12:25:40 -08:00
uwb
vfio IOMMU Updates for Linux v3.18 2014-10-15 07:23:49 +02:00
vhost
video Merge branch '3.18/omapdss-fixes' into 3.18/fbdev-fixes 2014-10-30 14:53:49 +02:00
virt
virtio One cc: stable commit, the rest are a series of minor cleanups which have 2014-10-18 10:25:09 -07:00
vlynq
vme
w1
watchdog watchdog: meson: remove magic value for reboot 2014-10-20 21:09:17 +02:00
xen xen/pci: Allocate memory for physdev_pci_device_add's optarr 2014-10-23 16:24:02 +01:00
zorro
Kconfig
Makefile