From: Adam Jackson Date: Mon, 15 Jun 2015 20:16:15 +0000 (-0400) Subject: drm/mgag200: Reject non-character-cell-aligned mode widths X-Git-Tag: v4.0.7~13 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2c94aabff872d175572af9f8b1003a7e53806e5a;p=thirdparty%2Fkernel%2Fstable.git drm/mgag200: Reject non-character-cell-aligned mode widths commit 25161084b1c1b0c29948f6f77266a35f302196b7 upstream. Turns out 1366x768 does not in fact work on this hardware. Signed-off-by: Adam Jackson Signed-off-by: Dave Airlie Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c index 9872ba9abf1a2..2ffeda3589c2c 100644 --- a/drivers/gpu/drm/mgag200/mgag200_mode.c +++ b/drivers/gpu/drm/mgag200/mgag200_mode.c @@ -1526,6 +1526,11 @@ static int mga_vga_mode_valid(struct drm_connector *connector, return MODE_BANDWIDTH; } + if ((mode->hdisplay % 8) != 0 || (mode->hsync_start % 8) != 0 || + (mode->hsync_end % 8) != 0 || (mode->htotal % 8) != 0) { + return MODE_H_ILLEGAL; + } + if (mode->crtc_hdisplay > 2048 || mode->crtc_hsync_start > 4096 || mode->crtc_hsync_end > 4096 || mode->crtc_htotal > 4096 || mode->crtc_vdisplay > 2048 || mode->crtc_vsync_start > 4096 ||