diff options
| author |   Joel A Fernandes <joelagnel@ti.com> | 2013-02-26 10:04:31 -0600 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2013-03-10 16:46:44 +0800 |
| commit | e68af48251ffb2a8aad4664ea68e0363893dda26 (patch) | |
| tree | bfdf3f4d8492de085a6923f7f6d39a097d7bdff7 /drivers/crypto/omap-sham.c | |
| parent | crypto: bfin_crc - Fix possible NULL pointer dereference (diff) | |
| download | linux-dev-e68af48251ffb2a8aad4664ea68e0363893dda26.tar.xz linux-dev-e68af48251ffb2a8aad4664ea68e0363893dda26.zip | |
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>
Diffstat (limited to 'drivers/crypto/omap-sham.c')
| -rw-r--r-- | drivers/crypto/omap-sham.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index 3d1611f5aecf..1cfdea142b6b 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -923,7 +923,7 @@ static void omap_sham_finish_req(struct ahash_request *req, int err) dd->flags &= ~(BIT(FLAGS_BUSY) | BIT(FLAGS_FINAL) | BIT(FLAGS_CPU) | BIT(FLAGS_DMA_READY) | BIT(FLAGS_OUTPUT_READY)); - pm_runtime_put_sync(dd->dev); + pm_runtime_put(dd->dev); if (req->base.complete) req->base.complete(&req->base, err); |