Reviewed-by: Lyude Paul <lyude@xxxxxxxxxx>
On Wed, 2018-12-19 at 15:51 -0800, Manasi Navare wrote:
> 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 <lyude@xxxxxxxxxx>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
> b/drivers/gpu/drm/i915/i915_debugfs.c
> index 77486a614614..aca26a25ed50 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) {
--
Cheers,
Lyude Paul
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