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Commit a1a82133 authored by Alex Deucher's avatar Alex Deucher Committed by Dave Airlie
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drm/radeon/kms: disable the r600 cb offset checker for linear surfaces 



There are too many strange corner cases triggered in old userspace
drivers out there to that it's nearly impossible to not break some
obscure app.

Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: default avatarAlex Deucher <alexdeucher@gmail.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent e5fd205f

drivers/gpu/drm/radeon/r600_cs.c

+4 −5
Original line number Diff line number Diff line
@@ -315,11 +315,10 @@ static inline int r600_cs_track_validate_cb(struct radeon_cs_parser *p, int i) 
		if (array_mode == V_0280A0_ARRAY_LINEAR_GENERAL) {

			/* the initial DDX does bad things with the CB size occasionally */

			/* it rounds up height too far for slice tile max but the BO is smaller */

			tmp = (height - 7) * 8 * bpe;

			if ((tmp + track->cb_color_bo_offset[i]) > radeon_bo_size(track->cb_color_bo[i])) {

				dev_warn(p->dev, "%s offset[%d] %d %d %lu too big\n", __func__, i, track->cb_color_bo_offset[i], tmp, radeon_bo_size(track->cb_color_bo[i]));

				return -EINVAL;

			}

			/* r600c,g also seem to flush at bad times in some apps resulting in

			 * bogus values here. So for linear just allow anything to avoid breaking

			 * broken userspace.

			 */

		} else {

			dev_warn(p->dev, "%s offset[%d] %d %d %lu too big\n", __func__, i, track->cb_color_bo_offset[i], tmp, radeon_bo_size(track->cb_color_bo[i]));

			return -EINVAL;