From: Hans Verkuil Date: Thu, 25 Aug 2011 12:43:49 +0000 (-0300) Subject: [media] wl128x: fix compiler warning + wrong write() return X-Git-Tag: firefly_0821_release~3680^2~4256^2~235 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=eb70ac1b1e457537a056cb714ccddbb1fd56f9ed;p=firefly-linux-kernel-4.4.55.git [media] wl128x: fix compiler warning + wrong write() return The fix is to check for ret and return -EFAULT if non-zero. I also noticed that write() didn't return the number of bytes written. Fixed as well. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/radio/wl128x/fmdrv_v4l2.c b/drivers/media/radio/wl128x/fmdrv_v4l2.c index 8c0e19276970..478d1e93ada6 100644 --- a/drivers/media/radio/wl128x/fmdrv_v4l2.c +++ b/drivers/media/radio/wl128x/fmdrv_v4l2.c @@ -84,12 +84,14 @@ static ssize_t fm_v4l2_fops_write(struct file *file, const char __user * buf, ret = copy_from_user(&rds, buf, sizeof(rds)); fmdbg("(%d)type: %d, text %s, af %d\n", ret, rds.text_type, rds.text, rds.af_freq); + if (ret) + return -EFAULT; fmdev = video_drvdata(file); fm_tx_set_radio_text(fmdev, rds.text, rds.text_type); fm_tx_set_af(fmdev, rds.af_freq); - return 0; + return sizeof(rds); } static u32 fm_v4l2_fops_poll(struct file *file, struct poll_table_struct *pts)