On Sat, Jun 19, 2010 at 03:12:51PM +0200, Dan Carpenter wrote:
> copy_to_user returns the number of bytes remaining to be copied, but we
> want to return a negative error code here. These are returned to
> userspace.
>
I didn't get a response on this patch.
regards,
dan carpenter
> Signed-off-by: Dan Carpenter <erro...@gmail.com>
>
> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
> index 59a2bf8..5fd876e 100644
> --- a/drivers/gpu/drm/i915/i915_dma.c
> +++ b/drivers/gpu/drm/i915/i915_dma.c
> @@ -608,8 +608,10 @@ static int i915_batchbuffer(struct drm_device *dev, void
> *data,
> ret = copy_from_user(cliprects, batch->cliprects,
> batch->num_cliprects *
> sizeof(struct drm_clip_rect));
> - if (ret != 0)
> + if (ret != 0) {
> + ret = -EFAULT;
> goto fail_free;
> + }
> }
>
> mutex_lock(&dev->struct_mutex);
> @@ -650,8 +652,10 @@ static int i915_cmdbuffer(struct drm_device *dev, void
> *data,
> return -ENOMEM;
>
> ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
> - if (ret != 0)
> + if (ret != 0) {
> + ret = -EFAULT;
> goto fail_batch_free;
> + }
>
> if (cmdbuf->num_cliprects) {
> cliprects = kcalloc(cmdbuf->num_cliprects,
> @@ -664,8 +668,10 @@ static int i915_cmdbuffer(struct drm_device *dev, void
> *data,
> ret = copy_from_user(cliprects, cmdbuf->cliprects,
> cmdbuf->num_cliprects *
> sizeof(struct drm_clip_rect));
> - if (ret != 0)
> + if (ret != 0) {
> + ret = -EFAULT;
> goto fail_clip_free;
> + }
> }
>
> mutex_lock(&dev->struct_mutex);
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