From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Holler Date: Sat, 21 Apr 2012 11:26:00 +0000 Subject: Re: [PATCH] video/udlfb: fix line counting in fb_write Message-Id: <4F929948.9010504@ahsoftware.de> List-Id: References: <1334959844-3665-1-git-send-email-holler@ahsoftware.de> In-Reply-To: <1334959844-3665-1-git-send-email-holler@ahsoftware.de> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Alexander Holler Cc: linux-kernel@vger.kernel.org, Bernie Thompson , linux-fbdev@vger.kernel.org Hello, sorry, I forgot to mention that this is a candidate for all stable trees 2.6.37 and above. Not sure how to announce that, but I think I should have added the below Cc: to the patch. Regards, Alexander Am 21.04.2012 00:10, schrieb Alexander Holler: > 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 Cc: stable@vger.kernel.org > --- > 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 a159b63..85d8110 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); >