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crypto: ccp - Ignore unconfigured CCP device on suspend/resume

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commit 5871cd93692c8071fb9358daccb715b5081316ac upstream.

If a CCP is unconfigured (e.g. there are no available queues) then
there will be no data structures allocated for the device. Thus, we
must check for validity of a pointer before trying to access structure
members.

Fixes: 720419f018 ("crypto: ccp - Introduce the AMD Secure Processor device")
Cc: <stable@vger.kernel.org>
Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gary R Hook
2019-08-19 22:23:27 +00:00
committed by Greg Kroah-Hartman
parent 4e77b2ea94
commit 690a424838
1 changed files with 8 additions and 0 deletions
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8
drivers/crypto/ccp/ccp-dev.c
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@@ -543,6 +543,10 @@ int ccp_dev_suspend(struct sp_device *sp, pm_message_t state)
unsigned long flags;
unsigned int i;
/* If there's no device there's nothing to do */
if (!ccp)
return 0;
spin_lock_irqsave(&ccp->cmd_lock, flags);
ccp->suspending = 1;
@@ -567,6 +571,10 @@ int ccp_dev_resume(struct sp_device *sp)
unsigned long flags;
unsigned int i;
/* If there's no device there's nothing to do */
if (!ccp)
return 0;
spin_lock_irqsave(&ccp->cmd_lock, flags);
ccp->suspending = 0;