On 27 May 2015 at 20:04, Frediano Ziglio <fziglio@xxxxxxxxxx> wrote:
> This function could return a NULL pointer in case of handle not
> present and in case of out of memory conditions however caller
> function always returned EINVAL error hiding a possible ENOMEM.
> This patch change the function to return the error instead to
> be able to propagate the error instead of assuming EINVAL.
>
> Signed-off-by: Frediano Ziglio <fziglio@xxxxxxxxxx>
Reviewed-by: Dave Airlie <airlied@xxxxxxxxxx>
> ---
> qxl/qxl_ioctl.c | 33 ++++++++++++++-------------------
> 1 file changed, 14 insertions(+), 19 deletions(-)
>
> diff --git a/qxl/qxl_ioctl.c b/qxl/qxl_ioctl.c
> index bb326ff..37f1faf 100644
> --- a/qxl/qxl_ioctl.c
> +++ b/qxl/qxl_ioctl.c
> @@ -107,9 +107,9 @@ apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
> }
>
> /* return holding the reference to this object */
> -static struct qxl_bo *qxlhw_handle_to_bo(struct qxl_device *qdev,
> - struct drm_file *file_priv, uint64_t handle,
> - struct qxl_release *release)
> +static int qxlhw_handle_to_bo(struct qxl_device *qdev,
> + struct drm_file *file_priv, uint64_t handle,
> + struct qxl_release *release, struct qxl_bo **qbo_p)
> {
> struct drm_gem_object *gobj;
> struct qxl_bo *qobj;
> @@ -117,16 +117,17 @@ static struct qxl_bo *qxlhw_handle_to_bo(struct qxl_device *qdev,
>
> gobj = drm_gem_object_lookup(qdev->ddev, file_priv, handle);
> if (!gobj)
> - return NULL;
> + return -EINVAL;
>
> qobj = gem_to_qxl_bo(gobj);
>
> ret = qxl_release_list_add(release, qobj);
> drm_gem_object_unreference_unlocked(gobj);
> if (ret)
> - return NULL;
> + return ret;
>
> - return qobj;
> + *qbo_p = qobj;
> + return 0;
> }
>
> /*
> @@ -219,13 +220,10 @@ static int qxl_process_single_command(struct qxl_device *qdev,
> reloc_info[i].type = reloc.reloc_type;
>
> if (reloc.dst_handle) {
> - reloc_info[i].dst_bo = qxlhw_handle_to_bo(qdev, file_priv,
> - reloc.dst_handle, release);
> - if (!reloc_info[i].dst_bo) {
> - ret = -EINVAL;
> - reloc_info[i].src_bo = NULL;
> + ret = qxlhw_handle_to_bo(qdev, file_priv, reloc.dst_handle, release,
> + &reloc_info[i].dst_bo);
> + if (ret)
> goto out_free_bos;
> - }
> reloc_info[i].dst_offset = reloc.dst_offset;
> } else {
> reloc_info[i].dst_bo = cmd_bo;
> @@ -234,14 +232,11 @@ static int qxl_process_single_command(struct qxl_device *qdev,
> num_relocs++;
>
> /* reserve and validate the reloc dst bo */
> - if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle > 0) {
> - reloc_info[i].src_bo =
> - qxlhw_handle_to_bo(qdev, file_priv,
> - reloc.src_handle, release);
> - if (!reloc_info[i].src_bo) {
> - ret = -EINVAL;
> + if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) {
> + ret = qxlhw_handle_to_bo(qdev, file_priv, reloc.src_handle, release,
> + &reloc_info[i].src_bo);
> + if (ret)
> goto out_free_bos;
> - }
> reloc_info[i].src_offset = reloc.src_offset;
> } else {
> reloc_info[i].src_bo = NULL;
> --
> 2.1.0
>
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