From: Joel A Fernandes <joelagnel@ti.com>
Date: Tue, 26 Feb 2013 16:04:31 +0000 (-0600)
Subject: crypto: omap-sham - Use pm_runtime_put instead of pm_runtime_put_sync in tasklet
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~57^2~50
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e68af48251ffb2a8aad4664ea68e0363893dda26;p=pandora-kernel.git

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>
---

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