Set the variable "line_length" in the function dlfb_ops_set_par. Without
this, we get garbage if we select different videomode with fbset.

Signed-off-by: Mikulas Patocka <mpato...@redhat.com>
Cc: sta...@vger.kernel.org

---
 drivers/video/fbdev/udlfb.c |    1 +
 1 file changed, 1 insertion(+)

Index: linux-4.17-rc7/drivers/video/fbdev/udlfb.c
===================================================================
--- linux-4.17-rc7.orig/drivers/video/fbdev/udlfb.c     2018-05-31 
14:50:00.000000000 +0200
+++ linux-4.17-rc7/drivers/video/fbdev/udlfb.c  2018-05-31 14:50:00.000000000 
+0200
@@ -1057,6 +1057,7 @@ static int dlfb_ops_set_par(struct fb_in
                return result;
 
        dlfb->current_mode = fvs;
+       info->fix.line_length = info->var.xres * (info->var.bits_per_pixel / 8);
 
        if (dlfb->fb_count == 0) {
 

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