diff options
| author | Alexander Holler <holler@ahsoftware.de> | 2012-08-14 09:11:09 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-21 09:32:41 -0700 |
| commit | c3588050e41a77f043295a21b2e845420063be1c (patch) | |
| tree | 5e85ce6c6ca7df2fb29b863af649196ee3303532 /drivers/video | |
| parent | 1c40e1c8d1e50dca33dc3f3f9dbb046f4996c2be (diff) | |
video/udlfb: fix line counting in fb_write
commit b8c4321f3d194469007f5f5f2b34ec278c264a04 upstream.
Line 0 and 1 were both written to line 0 (on the display) and all subsequent
lines had an offset of -1. The result was that the last line on the display
was never overwritten by writes to /dev/fbN.
Signed-off-by: Alexander Holler <holler@ahsoftware.de>
Acked-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/udlfb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/video/udlfb.c b/drivers/video/udlfb.c index 8af64148294b..38fcfff3c911 100644 --- a/drivers/video/udlfb.c +++ b/drivers/video/udlfb.c @@ -647,7 +647,7 @@ static ssize_t dlfb_ops_write(struct fb_info *info, const char __user *buf, result = fb_sys_write(info, buf, count, ppos); if (result > 0) { - int start = max((int)(offset / info->fix.line_length) - 1, 0); + int start = max((int)(offset / info->fix.line_length), 0); int lines = min((u32)((result / info->fix.line_length) + 1), (u32)info->var.yres); |