[PATCH] usb: dvb: check status of mxl111sf_read_reg

[Kangjie Lu]

When mxl111sf_read_reg fails, we shouldn't use "mode". The fix checks
its return value using mxl_fail

Signed-off-by: Kangjie Lu <k...@umn.edu>
---
 drivers/media/usb/dvb-usb-v2/mxl111sf-phy.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/usb/dvb-usb-v2/mxl111sf-phy.c 
b/drivers/media/usb/dvb-usb-v2/mxl111sf-phy.c
index ffb6e7c72f57..aecc3d02fc1e 100644
--- a/drivers/media/usb/dvb-usb-v2/mxl111sf-phy.c
+++ b/drivers/media/usb/dvb-usb-v2/mxl111sf-phy.c
@@ -130,7 +130,8 @@ int mxl111sf_config_mpeg_in(struct mxl111sf_state *state,
        mxl_fail(ret);
 
        /* Configure MPEG Clock phase */
-       mxl111sf_read_reg(state, V6_MPEG_IN_CLK_INV_REG, &mode);
+       ret = mxl111sf_read_reg(state, V6_MPEG_IN_CLK_INV_REG, &mode);
+       mxl_fail(ret);
 
        if (clock_phase == TSIF_NORMAL)
                mode &= ~V6_INVERTED_CLK_PHASE;
-- 
2.17.2 (Apple Git-113)