diff options
| author | Gary R Hook <gary.hook@amd.com> | 2019-08-19 22:23:27 +0000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-08-22 14:22:43 +1000 |
| commit | 5871cd93692c8071fb9358daccb715b5081316ac (patch) | |
| tree | 3878ea58fe8485d3dee5e3c1f89226734f24e367 /drivers/crypto | |
| parent | e2664ecbb2f26225ac6646876f2899558ffb2604 (diff) | |
| download | linux-5871cd93692c8071fb9358daccb715b5081316ac.tar.gz | |
crypto: ccp - Ignore unconfigured CCP device on suspend/resume
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>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/ccp/ccp-dev.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/crypto/ccp/ccp-dev.c b/drivers/crypto/ccp/ccp-dev.c index f3ff36f93207..db99af89ef18 100644 --- a/drivers/crypto/ccp/ccp-dev.c +++ b/drivers/crypto/ccp/ccp-dev.c @@ -540,6 +540,10 @@ 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; @@ -564,6 +568,10 @@ 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; |