diff options
| author | Bartlomiej Zolnierkiewicz <[email protected]> | 2013-07-03 15:00:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2013-07-03 16:07:22 -0700 |
| commit | da331ba8e9c5de72a27e50f71105395bba6eebe0 (patch) | |
| tree | 795d067d86a9d75e817d7ce1bb094cd7d949788f /lib/cpu-notifier-error-inject.c | |
| parent | fe74650166dd6905b0cf66594eb79222dc9d7109 (diff) | |
drivers/dma/pl330.c: fix locking in pl330_free_chan_resources()
tasklet_kill() may sleep so call it before taking pch->lock.
Fixes following lockup:
BUG: scheduling while atomic: cat/2383/0x00000002
Modules linked in:
unwind_backtrace+0x0/0xfc
__schedule_bug+0x4c/0x58
__schedule+0x690/0x6e0
sys_sched_yield+0x70/0x78
tasklet_kill+0x34/0x8c
pl330_free_chan_resources+0x24/0x88
dma_chan_put+0x4c/0x50
[...]
BUG: spinlock lockup suspected on CPU#0, swapper/0/0
lock: 0xe52aa04c, .magic: dead4ead, .owner: cat/2383, .owner_cpu: 1
unwind_backtrace+0x0/0xfc
do_raw_spin_lock+0x194/0x204
_raw_spin_lock_irqsave+0x20/0x28
pl330_tasklet+0x2c/0x5a8
tasklet_action+0xfc/0x114
__do_softirq+0xe4/0x19c
irq_exit+0x98/0x9c
handle_IPI+0x124/0x16c
gic_handle_irq+0x64/0x68
__irq_svc+0x40/0x70
cpuidle_wrap_enter+0x4c/0xa0
cpuidle_enter_state+0x18/0x68
cpuidle_idle_call+0xac/0xe0
cpu_idle+0xac/0xf0
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
Acked-by: Jassi Brar <[email protected]>
Cc: Vinod Koul <[email protected]>
Cc: Tomasz Figa <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/cpu-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions