From 45c1da501fc5051fb04f579692f5f0a7d3b0ffbe Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Thu, 15 Oct 2015 09:36:34 +0200 Subject: [PATCH] drm/radeon: Use rdev->gem.mutex to protect hyperz/cmask owners MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This removes the last depency of radeon for dev->struct_mutex! Also the locking scheme for hyperz/cmask owners seems a bit unsound, there's no protection in the preclose handler (and that never did hold dev->struct_mutex while being called). So grab the same lock there, too. There's also all the checks in the cs checker, but since the overall design seems to never stall for the previous owner I figured it's ok if I leave this racy. It was racy even before I touched it after all too. Reviewed-by: Christian König Signed-off-by: Daniel Vetter Signed-off-by: Alex Deucher --- drivers/gpu/drm/radeon/radeon_kms.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c index 977f1a5e11a5..0a68e8d711a1 100644 --- a/drivers/gpu/drm/radeon/radeon_kms.c +++ b/drivers/gpu/drm/radeon/radeon_kms.c @@ -181,7 +181,9 @@ static void radeon_set_filp_rights(struct drm_device *dev, struct drm_file *applier, uint32_t *value) { - mutex_lock(&dev->struct_mutex); + struct radeon_device *rdev = dev->dev_private; + + mutex_lock(&rdev->gem.mutex); if (*value == 1) { /* wants rights */ if (!*owner) @@ -192,7 +194,7 @@ static void radeon_set_filp_rights(struct drm_device *dev, *owner = NULL; } *value = *owner == applier ? 1 : 0; - mutex_unlock(&dev->struct_mutex); + mutex_unlock(&rdev->gem.mutex); } /* @@ -724,10 +726,14 @@ void radeon_driver_preclose_kms(struct drm_device *dev, struct drm_file *file_priv) { struct radeon_device *rdev = dev->dev_private; + + mutex_lock(&rdev->gem.mutex); if (rdev->hyperz_filp == file_priv) rdev->hyperz_filp = NULL; if (rdev->cmask_filp == file_priv) rdev->cmask_filp = NULL; + mutex_unlock(&rdev->gem.mutex); + radeon_uvd_free_handles(rdev, file_priv); radeon_vce_free_handles(rdev, file_priv); } -- 2.20.1