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authorDan Carpenter <dan.carpenter@oracle.com>2016-08-04 08:30:31 +0300
committerJassi Brar <jaswinder.singh@linaro.org>2016-08-29 16:11:15 +0300
commit068cf29eca4ef25556496635b978143b170b862c (patch)
tree9c188a417de5fe9051924fdd13f525865811736a /drivers/mailbox/bcm-pdc-mailbox.c
parente0c6fba45ab730afc22fa01ac1c42459893252ec (diff)
downloadlinux-068cf29eca4ef25556496635b978143b170b862c.tar.xz
mailbox: bcm-pdc: potential NULL dereference in pdc_shutdown()
We can't pass NULL pointers to pdc_ring_free() so I moved the check for NULL. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Diffstat (limited to 'drivers/mailbox/bcm-pdc-mailbox.c')
-rw-r--r--drivers/mailbox/bcm-pdc-mailbox.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/mailbox/bcm-pdc-mailbox.c b/drivers/mailbox/bcm-pdc-mailbox.c
index cbe0c1ee4ba9..c56d4d0b2307 100644
--- a/drivers/mailbox/bcm-pdc-mailbox.c
+++ b/drivers/mailbox/bcm-pdc-mailbox.c
@@ -1191,10 +1191,11 @@ static void pdc_shutdown(struct mbox_chan *chan)
{
struct pdc_state *pdcs = chan->con_priv;
- if (pdcs)
- dev_dbg(&pdcs->pdev->dev,
- "Shutdown mailbox channel for PDC %u", pdcs->pdc_idx);
+ if (!pdcs)
+ return;
+ dev_dbg(&pdcs->pdev->dev,
+ "Shutdown mailbox channel for PDC %u", pdcs->pdc_idx);
pdc_ring_free(pdcs);
}