Re: [PATCH 06/15] drm/exynos/ipp: free partially allocated resources on error
Hi,
On 08/27/2014 07:27 PM, Andrzej Hajda wrote:
> On 08/26/2014 07:00 AM, Joonyoung Shim wrote:
>> Hi Andrzej,
>>
>> On 08/22/2014 04:52 PM, Andrzej Hajda wrote:
>>> In case of allocation errors some already allocated buffers
>>> were not freed. The patch fixes it.
>>>
>>> Signed-off-by: Andrzej Hajda
>>> ---
>>> drivers/gpu/drm/exynos/exynos_drm_ipp.c | 68
>>> -
>>> 1 file changed, 33 insertions(+), 35 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
>>> b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
>>> index 060a198..728f3b9 100644
>>> --- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
>>> +++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
>>> @@ -599,6 +599,37 @@ static int ipp_set_mem_node(struct exynos_drm_ippdrv
>>> *ippdrv,
>>> return ret;
>>> }
>>>
>>> +static int ipp_put_mem_node(struct drm_device *drm_dev,
>>> + struct drm_exynos_ipp_cmd_node *c_node,
>>> + struct drm_exynos_ipp_mem_node *m_node)
>>> +{
>>> + int i;
>>> +
>>> + DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);
>>> +
>>> + if (!m_node) {
>>> + DRM_ERROR("invalid dequeue node.\n");
>>> + return -EFAULT;
>>> + }
>>> +
>>> + DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);
>>> +
>>> + /* put gem buffer */
>>> + for_each_ipp_planar(i) {
>>> + unsigned long handle = m_node->buf_info.handles[i];
>>> + if (handle)
>>> + exynos_drm_gem_put_dma_addr(drm_dev, handle,
>>> + c_node->filp);
>>> + }
>>> +
>>> + /* conditionally remove from queue */
>>> + if (m_node->list.next)
>> How about do INIT_LIST_HEAD for list in ipp_get_mem_node()?
>
> I am not sure if it is better. For sure it adds unnecessary
> initialization sequence.
In other words, this NULL checking is unnecessary if you initialize the
list_head by INIT_LIST_HEAD.
> Maybe adding list_is_initialized inline function to list.h would be the
> best solution.
There is just list_empty and we can't know whether list is initialized
or not. I recommend to use initialized list_head.
Thanks.
>
> Regards
> Andrzej
>
>>
>>> + list_del(&m_node->list);
>>> + kfree(m_node);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> static struct drm_exynos_ipp_mem_node
>>> *ipp_get_mem_node(struct drm_device *drm_dev,
>>> struct drm_file *file,
>>> @@ -634,7 +665,8 @@ static struct drm_exynos_ipp_mem_node
>>> qbuf->handle[i], file);
>>> if (IS_ERR(addr)) {
>>> DRM_ERROR("failed to get addr.\n");
>>> - goto err_clear;
>>> + ipp_put_mem_node(drm_dev, c_node, m_node);
>>> + return ERR_PTR(-EFAULT);
>>> }
>>>
>>> buf_info->handles[i] = qbuf->handle[i];
>>> @@ -649,40 +681,6 @@ static struct drm_exynos_ipp_mem_node
>>> mutex_unlock(&c_node->mem_lock);
>>>
>>> return m_node;
>>> -
>>> -err_clear:
>>> - kfree(m_node);
>>> - return ERR_PTR(-EFAULT);
>>> -}
>>> -
>>> -static int ipp_put_mem_node(struct drm_device *drm_dev,
>>> - struct drm_exynos_ipp_cmd_node *c_node,
>>> - struct drm_exynos_ipp_mem_node *m_node)
>>> -{
>>> - int i;
>>> -
>>> - DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);
>>> -
>>> - if (!m_node) {
>>> - DRM_ERROR("invalid dequeue node.\n");
>>> - return -EFAULT;
>>> - }
>>> -
>>> - DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);
>>> -
>>> - /* put gem buffer */
>>> - for_each_ipp_planar(i) {
>>> - unsigned long handle = m_node->buf_info.handles[i];
>>> - if (handle)
>>> - exynos_drm_gem_put_dma_addr(drm_dev, handle,
>>> - c_node->filp);
>>> - }
>>> -
>>> - /* delete list in queue */
>>> - list_del(&m_node->list);
>>> - kfree(m_node);
>>> -
>>> - return 0;
>>> }
>>>
>>> static void ipp_free_event(struct drm_pending_event *event)
>>>
>>
>
>
--
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Re: [PATCH 06/15] drm/exynos/ipp: free partially allocated resources on error
On 08/26/2014 07:00 AM, Joonyoung Shim wrote:
> Hi Andrzej,
>
> On 08/22/2014 04:52 PM, Andrzej Hajda wrote:
>> In case of allocation errors some already allocated buffers
>> were not freed. The patch fixes it.
>>
>> Signed-off-by: Andrzej Hajda
>> ---
>> drivers/gpu/drm/exynos/exynos_drm_ipp.c | 68
>> -
>> 1 file changed, 33 insertions(+), 35 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
>> b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
>> index 060a198..728f3b9 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
>> @@ -599,6 +599,37 @@ static int ipp_set_mem_node(struct exynos_drm_ippdrv
>> *ippdrv,
>> return ret;
>> }
>>
>> +static int ipp_put_mem_node(struct drm_device *drm_dev,
>> +struct drm_exynos_ipp_cmd_node *c_node,
>> +struct drm_exynos_ipp_mem_node *m_node)
>> +{
>> +int i;
>> +
>> +DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);
>> +
>> +if (!m_node) {
>> +DRM_ERROR("invalid dequeue node.\n");
>> +return -EFAULT;
>> +}
>> +
>> +DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);
>> +
>> +/* put gem buffer */
>> +for_each_ipp_planar(i) {
>> +unsigned long handle = m_node->buf_info.handles[i];
>> +if (handle)
>> +exynos_drm_gem_put_dma_addr(drm_dev, handle,
>> +c_node->filp);
>> +}
>> +
>> +/* conditionally remove from queue */
>> +if (m_node->list.next)
> How about do INIT_LIST_HEAD for list in ipp_get_mem_node()?
I am not sure if it is better. For sure it adds unnecessary
initialization sequence.
Maybe adding list_is_initialized inline function to list.h would be the
best solution.
Regards
Andrzej
>
>> +list_del(&m_node->list);
>> +kfree(m_node);
>> +
>> +return 0;
>> +}
>> +
>> static struct drm_exynos_ipp_mem_node
>> *ipp_get_mem_node(struct drm_device *drm_dev,
>> struct drm_file *file,
>> @@ -634,7 +665,8 @@ static struct drm_exynos_ipp_mem_node
>> qbuf->handle[i], file);
>> if (IS_ERR(addr)) {
>> DRM_ERROR("failed to get addr.\n");
>> -goto err_clear;
>> +ipp_put_mem_node(drm_dev, c_node, m_node);
>> +return ERR_PTR(-EFAULT);
>> }
>>
>> buf_info->handles[i] = qbuf->handle[i];
>> @@ -649,40 +681,6 @@ static struct drm_exynos_ipp_mem_node
>> mutex_unlock(&c_node->mem_lock);
>>
>> return m_node;
>> -
>> -err_clear:
>> -kfree(m_node);
>> -return ERR_PTR(-EFAULT);
>> -}
>> -
>> -static int ipp_put_mem_node(struct drm_device *drm_dev,
>> -struct drm_exynos_ipp_cmd_node *c_node,
>> -struct drm_exynos_ipp_mem_node *m_node)
>> -{
>> -int i;
>> -
>> -DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);
>> -
>> -if (!m_node) {
>> -DRM_ERROR("invalid dequeue node.\n");
>> -return -EFAULT;
>> -}
>> -
>> -DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);
>> -
>> -/* put gem buffer */
>> -for_each_ipp_planar(i) {
>> -unsigned long handle = m_node->buf_info.handles[i];
>> -if (handle)
>> -exynos_drm_gem_put_dma_addr(drm_dev, handle,
>> -c_node->filp);
>> -}
>> -
>> -/* delete list in queue */
>> -list_del(&m_node->list);
>> -kfree(m_node);
>> -
>> -return 0;
>> }
>>
>> static void ipp_free_event(struct drm_pending_event *event)
>>
>
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Re: [PATCH 06/15] drm/exynos/ipp: free partially allocated resources on error
Hi Andrzej,
On 08/22/2014 04:52 PM, Andrzej Hajda wrote:
> In case of allocation errors some already allocated buffers
> were not freed. The patch fixes it.
>
> Signed-off-by: Andrzej Hajda
> ---
> drivers/gpu/drm/exynos/exynos_drm_ipp.c | 68
> -
> 1 file changed, 33 insertions(+), 35 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
> b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
> index 060a198..728f3b9 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
> @@ -599,6 +599,37 @@ static int ipp_set_mem_node(struct exynos_drm_ippdrv
> *ippdrv,
> return ret;
> }
>
> +static int ipp_put_mem_node(struct drm_device *drm_dev,
> + struct drm_exynos_ipp_cmd_node *c_node,
> + struct drm_exynos_ipp_mem_node *m_node)
> +{
> + int i;
> +
> + DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);
> +
> + if (!m_node) {
> + DRM_ERROR("invalid dequeue node.\n");
> + return -EFAULT;
> + }
> +
> + DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);
> +
> + /* put gem buffer */
> + for_each_ipp_planar(i) {
> + unsigned long handle = m_node->buf_info.handles[i];
> + if (handle)
> + exynos_drm_gem_put_dma_addr(drm_dev, handle,
> + c_node->filp);
> + }
> +
> + /* conditionally remove from queue */
> + if (m_node->list.next)
How about do INIT_LIST_HEAD for list in ipp_get_mem_node()?
> + list_del(&m_node->list);
> + kfree(m_node);
> +
> + return 0;
> +}
> +
> static struct drm_exynos_ipp_mem_node
> *ipp_get_mem_node(struct drm_device *drm_dev,
> struct drm_file *file,
> @@ -634,7 +665,8 @@ static struct drm_exynos_ipp_mem_node
> qbuf->handle[i], file);
> if (IS_ERR(addr)) {
> DRM_ERROR("failed to get addr.\n");
> - goto err_clear;
> + ipp_put_mem_node(drm_dev, c_node, m_node);
> + return ERR_PTR(-EFAULT);
> }
>
> buf_info->handles[i] = qbuf->handle[i];
> @@ -649,40 +681,6 @@ static struct drm_exynos_ipp_mem_node
> mutex_unlock(&c_node->mem_lock);
>
> return m_node;
> -
> -err_clear:
> - kfree(m_node);
> - return ERR_PTR(-EFAULT);
> -}
> -
> -static int ipp_put_mem_node(struct drm_device *drm_dev,
> - struct drm_exynos_ipp_cmd_node *c_node,
> - struct drm_exynos_ipp_mem_node *m_node)
> -{
> - int i;
> -
> - DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);
> -
> - if (!m_node) {
> - DRM_ERROR("invalid dequeue node.\n");
> - return -EFAULT;
> - }
> -
> - DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);
> -
> - /* put gem buffer */
> - for_each_ipp_planar(i) {
> - unsigned long handle = m_node->buf_info.handles[i];
> - if (handle)
> - exynos_drm_gem_put_dma_addr(drm_dev, handle,
> - c_node->filp);
> - }
> -
> - /* delete list in queue */
> - list_del(&m_node->list);
> - kfree(m_node);
> -
> - return 0;
> }
>
> static void ipp_free_event(struct drm_pending_event *event)
>
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