diff options
| author | Colin Ian King <colin.king@canonical.com> | 2021-09-17 18:07:02 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-17 11:04:03 +0100 |
| commit | ee85728ec044ef270645806898bad27b1dd3a1d7 (patch) | |
| tree | 6f84a04b761f84eed5aa9d017e5c5c2c707cf375 | |
| parent | 2b942c364b7759d8422d163786cd40d3834b17c8 (diff) | |
media: em28xx: Don't use ops->suspend if it is NULL
[ Upstream commit 51fa3b70d27342baf1ea8aaab3e96e5f4f26d5b2 ]
The call to ops->suspend for the dev->dev_next case can currently
trigger a call on a null function pointer if ops->suspend is null.
Skip over the use of function ops->suspend if it is null.
Addresses-Coverity: ("Dereference after null check")
Fixes: be7fd3c3a8c5 ("media: em28xx: Hauppauge DualHD second tuner functionality")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-core.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-core.c b/drivers/media/usb/em28xx/em28xx-core.c index 584fa400cd7d..acc0bf7dbe2b 100644 --- a/drivers/media/usb/em28xx/em28xx-core.c +++ b/drivers/media/usb/em28xx/em28xx-core.c @@ -1154,8 +1154,9 @@ int em28xx_suspend_extension(struct em28xx *dev) dev_info(&dev->intf->dev, "Suspending extensions\n"); mutex_lock(&em28xx_devlist_mutex); list_for_each_entry(ops, &em28xx_extension_devlist, next) { - if (ops->suspend) - ops->suspend(dev); + if (!ops->suspend) + continue; + ops->suspend(dev); if (dev->dev_next) ops->suspend(dev->dev_next); } |