From: YoungJun Cho <yj44....@samsung.com>
The c_node->event_list should be protected with
c_node->event_lock.
Signed-off-by: YoungJun Cho <yj44....@samsung.com>
Acked-by: Seong-Woo Kim <sw0312....@samsung.com>
Acked-by: Kyungmin Park <kyungmin.p...@samsung.com>
Tested-by: Andrzej Hajda <a.ha...@samsung.com>
---
drivers/gpu/drm/exynos/exynos_drm_ipp.c | 25 ++++++++++++++-----------
1 file changed, 14 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
index 4b5afd3..603a796 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
@@ -796,7 +796,9 @@ static int ipp_get_event(struct drm_device *drm_dev,
e->base.event = &e->event.base;
e->base.file_priv = file;
e->base.destroy = ipp_free_event;
+ mutex_lock(&c_node->event_lock);
list_add_tail(&e->base.link, &c_node->event_list);
+ mutex_unlock(&c_node->event_lock);
return 0;
}
@@ -807,6 +809,7 @@ static void ipp_put_event(struct drm_exynos_ipp_cmd_node
*c_node,
struct drm_exynos_ipp_send_event *e, *te;
int count = 0;
+ mutex_lock(&c_node->event_lock);
list_for_each_entry_safe(e, te, &c_node->event_list, base.link) {
DRM_DEBUG_KMS("count[%d]e[0x%x]\n", count++, (int)e);
@@ -827,9 +830,13 @@ static void ipp_put_event(struct drm_exynos_ipp_cmd_node
*c_node,
/* delete list */
list_del(&e->base.link);
kfree(e);
- return;
+ goto out_unlock;
}
}
+
+out_unlock:
+ mutex_unlock(&c_node->event_lock);
+ return;
}
static void ipp_handle_cmd_work(struct device *dev,
@@ -1515,9 +1522,11 @@ static int ipp_send_event(struct exynos_drm_ippdrv
*ippdrv,
return -EINVAL;
}
+ mutex_lock(&c_node->event_lock);
if (list_empty(&c_node->event_list)) {
DRM_DEBUG_KMS("event list is empty.\n");
- return 0;
+ ret = 0;
+ goto err_event_unlock;
}
mutex_lock(&c_node->mem_lock);
@@ -1609,11 +1618,6 @@ static int ipp_send_event(struct exynos_drm_ippdrv
*ippdrv,
e = list_first_entry(&c_node->event_list,
struct drm_exynos_ipp_send_event, base.link);
- if (!e) {
- DRM_ERROR("empty event.\n");
- return -EINVAL;
- }
-
do_gettimeofday(&now);
DRM_DEBUG_KMS("tv_sec[%ld]tv_usec[%ld]\n", now.tv_sec, now.tv_usec);
e->event.tv_sec = now.tv_sec;
@@ -1628,6 +1632,7 @@ static int ipp_send_event(struct exynos_drm_ippdrv
*ippdrv,
list_move_tail(&e->base.link, &e->base.file_priv->event_list);
wake_up_interruptible(&e->base.file_priv->event_wait);
spin_unlock_irqrestore(&drm_dev->event_lock, flags);
+ mutex_unlock(&c_node->event_lock);
DRM_DEBUG_KMS("done cmd[%d]prop_id[%d]buf_id[%d]\n",
property->cmd, property->prop_id, tbuf_id[EXYNOS_DRM_OPS_DST]);
@@ -1636,6 +1641,8 @@ static int ipp_send_event(struct exynos_drm_ippdrv
*ippdrv,
err_mem_unlock:
mutex_unlock(&c_node->mem_lock);
+err_event_unlock:
+ mutex_unlock(&c_node->event_lock);
return ret;
}
@@ -1678,8 +1685,6 @@ void ipp_sched_event(struct work_struct *work)
goto err_completion;
}
- mutex_lock(&c_node->event_lock);
-
ret = ipp_send_event(ippdrv, c_node, event_work->buf_id);
if (ret) {
DRM_ERROR("failed to send event.\n");
@@ -1689,8 +1694,6 @@ void ipp_sched_event(struct work_struct *work)
err_completion:
if (ipp_is_m2m_cmd(c_node->property.cmd))
complete(&c_node->start_complete);
-
- mutex_unlock(&c_node->event_lock);
}
static int ipp_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
--
1.9.1
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