From a7c8aadad39428b64d26c3971d967f8314e2397d Mon Sep 17 00:00:00 2001 From: Miroslav Slugen Date: Sun, 11 Dec 2011 18:57:58 -0300 Subject: [PATCH] [media] cx23885-dvb: check if dvb_attach() succeded Fix possible null dereference for Leadtek DTV 3200H XC4000 tuner when no firmware file available. Cc: stable@kernel.org Signed-off-by: Miroslav Slugen Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx23885/cx23885-dvb.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/media/video/cx23885/cx23885-dvb.c b/drivers/media/video/cx23885/cx23885-dvb.c index af8a225763d3..6835eb1fc093 100644 --- a/drivers/media/video/cx23885/cx23885-dvb.c +++ b/drivers/media/video/cx23885/cx23885-dvb.c @@ -943,6 +943,11 @@ static int dvb_register(struct cx23885_tsport *port) fe = dvb_attach(xc4000_attach, fe0->dvb.frontend, &dev->i2c_bus[1].i2c_adap, &cfg); + if (!fe) { + printk(KERN_ERR "%s/2: xc4000 attach failed\n", + dev->name); + goto frontend_detach; + } } break; case CX23885_BOARD_TBS_6920: -- 2.20.1