From: Gary R Hook gary.hook@amd.com
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: 720419f01832f ("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
--- drivers/crypto/ccp/ccp-dev.c | 8 ++++++++ 1 file changed, 8 insertions(+)
--- a/drivers/crypto/ccp/ccp-dev.c +++ b/drivers/crypto/ccp/ccp-dev.c @@ -543,6 +543,10 @@ int ccp_dev_suspend(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 = 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;