From a9cb97c3e628902e37583d8a40bb28cf76522cf1 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Wed, 1 Nov 2017 17:05:39 -0400 Subject: [PATCH] media: dvb_frontend: be sure to init dvb_frontend_handle_ioctl() return code As smatch warned: drivers/media/dvb-core/dvb_frontend.c:2468 dvb_frontend_handle_ioctl() error: uninitialized symbol 'err'. The ioctl handler actually got a regression here: before changeset d73dcf0cdb95 ("media: dvb_frontend: cleanup ioctl handling logic"), the code used to return -EOPNOTSUPP if an ioctl handler was not implemented on a driver. After the change, it may return a random value. Fixes: d73dcf0cdb95 ("media: dvb_frontend: cleanup ioctl handling logic") Cc: stable@vger.kernel.org Signed-off-by: Mauro Carvalho Chehab Tested-by: Daniel Scheller Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-core/dvb_frontend.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c index 2afaa82..46f9771 100644 --- a/drivers/media/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb-core/dvb_frontend.c @@ -2110,7 +2110,7 @@ static int dvb_frontend_handle_ioctl(struct file *file, struct dvb_frontend *fe = dvbdev->priv; struct dvb_frontend_private *fepriv = fe->frontend_priv; struct dtv_frontend_properties *c = &fe->dtv_property_cache; - int i, err; + int i, err = -EOPNOTSUPP; dev_dbg(fe->dvb->device, "%s:\n", __func__); @@ -2145,6 +2145,7 @@ static int dvb_frontend_handle_ioctl(struct file *file, } } kfree(tvp); + err = 0; break; } case FE_GET_PROPERTY: { @@ -2196,6 +2197,7 @@ static int dvb_frontend_handle_ioctl(struct file *file, return -EFAULT; } kfree(tvp); + err = 0; break; } -- 2.7.4