diff options
| author | Alexander Holler <holler@ahsoftware.de> | 2012-04-21 00:11:07 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-15 08:10:08 -0700 |
| commit | 8b0331a46c6aa9f853e1208b0ce137c4d1d4fc1a (patch) | |
| tree | b99052ec326569a53678b9ba43486de85522e810 /drivers/video | |
| parent | fb060f3d95d29c385063151c8a09faa4d1a02f2f (diff) | |
video/smscufx: fix line counting in fb_write
commit 2fe2d9f47cfe1a3e66e7d087368b3d7155b04c15 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.
The origin of this bug seems to have been udlfb.
Signed-off-by: Alexander Holler <holler@ahsoftware.de>
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/smscufx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/video/smscufx.c b/drivers/video/smscufx.c index ccbfef5e828..1e1e2d267f4 100644 --- a/drivers/video/smscufx.c +++ b/drivers/video/smscufx.c @@ -904,7 +904,7 @@ static ssize_t ufx_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); |