[PATCH] media: pci: cx18: if cx == NULL, then don't use it.

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If the cx NULL pointer check is true, then it reports
an error with CX18_ERR, but that uses cx. Replace it with
pr_err.

Reported by smatch:

drivers/media/pci/cx18/cx18-mailbox.c:834 cx18_vapi() error: we previously assumed 'cx' could be null (see line 833)

Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
---
 drivers/media/pci/cx18/cx18-mailbox.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/pci/cx18/cx18-mailbox.c b/drivers/media/pci/cx18/cx18-mailbox.c
index 3b283f3c6726..a6457c23d18c 100644
--- a/drivers/media/pci/cx18/cx18-mailbox.c
+++ b/drivers/media/pci/cx18/cx18-mailbox.c
@@ -831,7 +831,7 @@ int cx18_vapi(struct cx18 *cx, u32 cmd, int args, ...)
 	int i;

 	if (cx == NULL) {
-		CX18_ERR("cx == NULL (cmd=%x)\n", cmd);
+		pr_err("cx == NULL (cmd=%x)\n", cmd);
 		return 0;
 	}
 	if (args > MAX_MB_ARGUMENTS) {
-- 
2.42.0




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