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| author | Ludovic Desroches <ludovic.desroches@atmel.com> | 2013-04-18 11:52:59 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-18 19:54:22 +0400 |
| commit | d202f05158442396033f416df376f8ece1f563df (patch) | |
| tree | 1c08c8128ac638606af144eec1338c864310a3d4 /lib/atomic64.c | |
| parent | ebe80544338a393e94b65995120c3028c80abc62 (diff) | |
| download | linux-d202f05158442396033f416df376f8ece1f563df.tar.xz | |
dmaengine: at_hdmac: fix race condition in atc_advance_work()
The BUG_ON() directive is triggered probably due to a latency
modification following inclusion of commit c10d73671ad3 ("softirq:
reduce latencies"). This condition has not been met before 3.9-rc1 and
doesn't trigger without this patch.
We now make sure that DMA channel is idle before calling
atc_complete_all() which makes the BUG_ON() "protection" useless.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/atomic64.c')
0 files changed, 0 insertions, 0 deletions