From 5871cd93692c8071fb9358daccb715b5081316ac Mon Sep 17 00:00:00 2001 From: Gary R Hook Date: Mon, 19 Aug 2019 22:23:27 +0000 Subject: 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: Signed-off-by: Gary R Hook Signed-off-by: Herbert Xu --- drivers/crypto/ccp/ccp-dev.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/crypto') 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; -- cgit v1.2.1