crypto: omap-sham - Use pm_runtime_put instead of pm_runtime_put_sync in tasklet
authorJoel A Fernandes <joelagnel@ti.com>
Tue, 26 Feb 2013 16:04:31 +0000 (10:04 -0600)
committerHerbert Xu <herbert@gondor.apana.org.au>
Sun, 10 Mar 2013 08:46:44 +0000 (16:46 +0800)
commite68af48251ffb2a8aad4664ea68e0363893dda26
treebfdf3f4d8492de085a6923f7f6d39a097d7bdff7
parentfb1dd794802022f4413d36e47bd40f8c7bacd456
crypto: omap-sham - Use pm_runtime_put instead of pm_runtime_put_sync in tasklet

After DMA is complete, the omap_sham_finish_req function is called as
a part of the done_task tasklet. During this its atomic and any calls
to pm functions should not assume they wont sleep.

The patch replaces a call to pm_runtime_put_sync (which can sleep) with
pm_runtime_put thus fixing a kernel panic observed on AM33xx SoC during
SHA operation.

Tested on an AM33xx SoC device (beaglebone board).
To reproduce the problem, used the tcrypt kernel module as:
modprobe tcrypt sec=2 mode=403

Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
Cc: David S. Miller <davem@davemloft.net>
Acked-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
drivers/crypto/omap-sham.c