Changeset be7fd3c3a8c5 ("media: em28xx: Hauppauge DualHD
second tuner functionality") introduced a potential NULL pointer
dereference, as pointed by Coverity:
CID 1434731 (#1 of 1): Dereference after null check (FORWARD_NULL)16. var_deref_op: Dereferencing null pointer ops->resume.
var_compare_op: Comparing ops->resume to null implies that ops->resume might be null.
1174 if (ops->resume)
1175 ops->resume(dev);
1176 if (dev->dev_next)
1177 ops->resume(dev->dev_next);
Fixes: be7fd3c3a8c5 ("media: em28xx: Hauppauge DualHD second tuner functionality")
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
---
drivers/media/usb/em28xx/em28xx-core.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/media/usb/em28xx/em28xx-core.c b/drivers/media/usb/em28xx/em28xx-core.c
index 36d341fb65dd..0cefd29184f6 100644
--- a/drivers/media/usb/em28xx/em28xx-core.c
+++ b/drivers/media/usb/em28xx/em28xx-core.c
@@ -1171,8 +1171,9 @@ int em28xx_resume_extension(struct em28xx *dev)
dev_info(&dev->intf->dev, "Resuming extensions\n");
mutex_lock(&em28xx_devlist_mutex);
list_for_each_entry(ops, &em28xx_extension_devlist, next) {
- if (ops->resume)
- ops->resume(dev);
+ if (!ops->resume)
+ continue;
+ ops->resume(dev);
if (dev->dev_next)
ops->resume(dev->dev_next);
}
--
2.14.3
