From: Chris Wilson Date: Fri, 15 Mar 2019 16:39:33 +0000 (+0000) Subject: drm/i915: Fix off-by-one in reporting hanging process X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=9073e5b26743b8b675cc44a9c0c8f8c3d584e1c0;p=openwrt%2Fstaging%2Fblogic.git drm/i915: Fix off-by-one in reporting hanging process ffs() is 1-indexed, but we want to use it as an index into an array, so use __ffs() instead. Fixes: eb8d0f5af4ec ("drm/i915: Remove GPU reset dependence on struct_mutex") Signed-off-by: Chris Wilson Cc: Mika Kuoppala Reviewed-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20190315163933.19352-1-chris@chris-wilson.co.uk --- diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c index 3d8020888604..26bac517e383 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -1656,7 +1656,7 @@ error_msg(struct i915_gpu_state *error, unsigned long engines, const char *msg) i915_error_generate_code(error, engines)); if (engines) { /* Just show the first executing process, more is confusing */ - i = ffs(engines); + i = __ffs(engines); len += scnprintf(error->error_msg + len, sizeof(error->error_msg) - len, ", in %s [%d]",