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authorAlexander Holler <holler@ahsoftware.de>2012-08-14 09:11:09 +0200
committerFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>2012-10-10 02:02:45 +0000
commitb8c4321f3d194469007f5f5f2b34ec278c264a04 (patch)
treece17b6ee47c11341bca03e1a8a44bd21db5cc710 /drivers/video/udlfb.c
parentebe9f7b02590d870506ef493483fe4abdb08e967 (diff)
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video/udlfb: fix line counting in fb_write
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. Cc: stable@vger.kernel.org Signed-off-by: Alexander Holler <holler@ahsoftware.de> Acked-by: Bernie Thompson <bernie@plugable.com> Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Diffstat (limited to 'drivers/video/udlfb.c')
-rw-r--r--drivers/video/udlfb.c2
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);