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>
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@ -647,7 +647,7 @@ static ssize_t dlfb_ops_write(struct fb_info *info, const char __user *buf,
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result = fb_sys_write(info, buf, count, ppos);
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result = fb_sys_write(info, buf, count, ppos);
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if (result > 0) {
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if (result > 0) {
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int start = max((int)(offset / info->fix.line_length) - 1, 0);
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int start = max((int)(offset / info->fix.line_length), 0);
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int lines = min((u32)((result / info->fix.line_length) + 1),
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int lines = min((u32)((result / info->fix.line_length) + 1),
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(u32)info->var.yres);
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(u32)info->var.yres);
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