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drm/xen-front: fix xen_drm_front_shbuf_alloc() error handling

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The xen_drm_front_shbuf_alloc() function was returning a mix of error
pointers and NULL and the the caller wasn't checking correctly.  I've
changed it to always return error pointer consistently.

Fixes: c575b7eeb8 ("drm/xen-front: Add support for Xen PV display frontend")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180508092739.GB661@mwanda
This commit is contained in:
Dan Carpenter 2018-05-08 12:27:39 +03:00 committed by Oleksandr Andrushchenko
parent e30ca4bcf0
commit 18f20bc530
2 changed files with 3 additions and 3 deletions
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4
drivers/gpu/drm/xen/xen_drm_front.c
View File

@ -188,8 +188,8 @@ int xen_drm_front_dbuf_create(struct xen_drm_front_info *front_info,
buf_cfg.be_alloc = front_info->cfg.be_alloc;
shbuf = xen_drm_front_shbuf_alloc(&buf_cfg);
if (!shbuf)
return -ENOMEM;
if (IS_ERR(shbuf))
return PTR_ERR(shbuf);
ret = dbuf_add_to_list(front_info, shbuf, dbuf_cookie);
if (ret < 0) {

2
drivers/gpu/drm/xen/xen_drm_front_shbuf.c
View File

@ -383,7 +383,7 @@ xen_drm_front_shbuf_alloc(struct xen_drm_front_shbuf_cfg *cfg)
buf = kzalloc(sizeof(*buf), GFP_KERNEL);
if (!buf)
return NULL;
return ERR_PTR(-ENOMEM);
if (cfg->be_alloc)
buf->ops = &backend_ops;