From d99004d7201aa653658ff2390d6e516567c96ebc Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Thu, 6 Jun 2019 23:15:44 +0200 Subject: [PATCH] drm/crc-debugfs: Also sprinkle irqrestore over early exits MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit I. was. blind. Caught with vkms, which has some really slow crc computation function. Fixes: 1882018a70e0 ("drm/crc-debugfs: User irqsafe spinlock in drm_crtc_add_crc_entry") Cc: Rodrigo Siqueira Cc: Tomeu Vizoso Cc: Emil Velikov Cc: Benjamin Gaignard Cc: Ville Syrjälä Reviewed-by: Emil Velikov Reviewed-by: Benjamin Gaignard Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20190606211544.5389-1-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_debugfs_crc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_debugfs_crc.c b/drivers/gpu/drm/drm_debugfs_crc.c index 7f35b5ba1924..d2f102f01515 100644 --- a/drivers/gpu/drm/drm_debugfs_crc.c +++ b/drivers/gpu/drm/drm_debugfs_crc.c @@ -402,7 +402,7 @@ int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame, /* Caller may not have noticed yet that userspace has stopped reading */ if (!crc->entries) { - spin_unlock(&crc->lock); + spin_unlock_irqrestore(&crc->lock, flags); return -EINVAL; } @@ -413,7 +413,7 @@ int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame, bool was_overflow = crc->overflow; crc->overflow = true; - spin_unlock(&crc->lock); + spin_unlock_irqrestore(&crc->lock, flags); if (!was_overflow) DRM_ERROR("Overflow of CRC buffer, userspace reads too slow.\n"); -- 2.30.2