From: Manasi Navare Date: Wed, 19 Dec 2018 23:51:20 +0000 (-0800) Subject: drm/i915/dsc: Fix the deadlock in dsc debugfs node X-Git-Tag: v5.4-rc1~1388^2~28^2~64 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6afe8925a297a0458248e5e8b13dab91e782337e;p=platform%2Fkernel%2Flinux-rpi.git drm/i915/dsc: Fix the deadlock in dsc debugfs node The DSC debugfs node causes a possible deadlock situation. This patch resets the try_again at the beginning of loop to fix this. Fixes: e845f099f1c6 ('drm/i915/dsc: Add Per connector debugfs node for DSC support/enable') Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109097 Cc: Lyude Paul Cc: Chris Wilson Signed-off-by: Manasi Navare Reviewed-by: Lyude Paul Signed-off-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20181219235120.21816-1-manasi.d.navare@intel.com --- diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 77486a6..aca26a2 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -5108,6 +5108,7 @@ static int i915_dsc_fec_support_show(struct seq_file *m, void *data) drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); do { + try_again = false; ret = drm_modeset_lock(&dev->mode_config.connection_mutex, &ctx); if (ret) {