From: Chris Wilson Date: Thu, 3 Jan 2019 21:33:40 +0000 (+0000) Subject: drm/i915: Do not allow unwedging following a failed driver initialisation X-Git-Tag: v5.1-rc1~23^2~28^2~23 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=55c15512a9cf6e287883ca826a4671a26f4f2afc;p=uclinux-h8%2Flinux.git drm/i915: Do not allow unwedging following a failed driver initialisation If we declare the driver wedged during early initialisation, we leave the driver in an undefined state (with respect to GEM execution). As this leads to unexpected behaviour if we allow the user to unwedge the device (through debugfs, and performed by igt at test start), do not. Signed-off-by: Chris Wilson Reviewed-by: Mika Kuoppala Link: https://patchwork.freedesktop.org/patch/msgid/20190103213340.1669-1-chris@chris-wilson.co.uk --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 4b1656d2482e..60019e9291ce 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -3380,6 +3380,9 @@ bool i915_gem_unset_wedged(struct drm_i915_private *i915) if (!test_bit(I915_WEDGED, &i915->gpu_error.flags)) return true; + if (!i915->gt.scratch) /* Never full initialised, recovery impossible */ + return false; + GEM_TRACE("start\n"); /*