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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>
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@ -636,7 +636,7 @@ static void omap_aes_finish_req(struct omap_aes_dev *dd, int err)
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pr_debug("err: %d\n", err);
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pm_runtime_put_sync(dd->dev);
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pm_runtime_put(dd->dev);
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dd->flags &= ~FLAGS_BUSY;
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req->base.complete(&req->base, err);
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