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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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@ -923,7 +923,7 @@ static void omap_sham_finish_req(struct ahash_request *req, int err)
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dd->flags &= ~(BIT(FLAGS_BUSY) | BIT(FLAGS_FINAL) | BIT(FLAGS_CPU) |
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BIT(FLAGS_DMA_READY) | BIT(FLAGS_OUTPUT_READY));
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pm_runtime_put_sync(dd->dev);
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pm_runtime_put(dd->dev);
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if (req->base.complete)
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req->base.complete(&req->base, err);
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