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authorJoel A Fernandes <joelagnel@ti.com>2013-02-26 10:04:32 -0600
committerHerbert Xu <herbert@gondor.apana.org.au>2013-03-10 16:46:44 +0800
commitbbbaa37428abac025fe11b83933473888ddf6fc1 (patch)
tree88efc6b495eee0725c932e126564295d4e98076b /drivers/crypto
parente68af48251ffb2a8aad4664ea68e0363893dda26 (diff)
crypto: omap-aes - Use pm_runtime_put instead of pm_runtime_put_sync in tasklet
After DMA is complete, the omap_aes_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 AES operation. Tested on an AM33xx SoC device (beaglebone board). To reproduce the problem, I used the tcrypt kernel module as: modprobe tcrypt sec=2 mode=500 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>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/omap-aes.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c
index 6aa425fe0ed5..1e5a17adefe4 100644
--- a/drivers/crypto/omap-aes.c
+++ b/drivers/crypto/omap-aes.c
@@ -636,7 +636,7 @@ static void omap_aes_finish_req(struct omap_aes_dev *dd, int err)
pr_debug("err: %d\n", err);
- pm_runtime_put_sync(dd->dev);
+ pm_runtime_put(dd->dev);
dd->flags &= ~FLAGS_BUSY;
req->base.complete(&req->base, err);