diff options
Diffstat (limited to 'drivers/gpu/drm/msm/msm_perf.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_perf.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/gpu/drm/msm/msm_perf.c b/drivers/gpu/drm/msm/msm_perf.c index 490cadda2796..3d3da79fec2a 100644 --- a/drivers/gpu/drm/msm/msm_perf.c +++ b/drivers/gpu/drm/msm/msm_perf.c @@ -15,6 +15,9 @@ #ifdef CONFIG_DEBUG_FS #include <linux/debugfs.h> +#include <linux/uaccess.h> + +#include <drm/drm_file.h> #include "msm_drv.h" #include "msm_gpu.h" @@ -152,9 +155,12 @@ static int perf_open(struct inode *inode, struct file *file) struct msm_gpu *gpu = priv->gpu; int ret = 0; - mutex_lock(&dev->struct_mutex); + if (!gpu) + return -ENODEV; + + mutex_lock(&gpu->lock); - if (perf->open || !gpu) { + if (perf->open) { ret = -EBUSY; goto out; } @@ -168,7 +174,7 @@ static int perf_open(struct inode *inode, struct file *file) perf->next_jiffies = jiffies + SAMPLE_TIME; out: - mutex_unlock(&dev->struct_mutex); + mutex_unlock(&gpu->lock); return ret; } |