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| author | Joel A Fernandes <joelagnel@ti.com> | 2013-02-26 10:04:32 -0600 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2013-03-10 16:46:44 +0800 |
| commit | bbbaa37428abac025fe11b83933473888ddf6fc1 (patch) | |
| tree | 88efc6b495eee0725c932e126564295d4e98076b | |
| parent | e68af48251ffb2a8aad4664ea68e0363893dda26 (diff) | |
| download | linux-bbbaa37428abac025fe11b83933473888ddf6fc1.tar.gz linux-bbbaa37428abac025fe11b83933473888ddf6fc1.tar.bz2 linux-bbbaa37428abac025fe11b83933473888ddf6fc1.zip | |
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>
| -rw-r--r-- | drivers/crypto/omap-aes.c | 2 |
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); |