From: Oleksandr Andrushchenko oleksandr_andrushchenko@epam.com
commit 14dee058610446aa464254fc5c8e88c7535195e0 upstream
The patch c575b7eeb89f: "drm/xen-front: Add support for Xen PV display frontend" from Apr 3, 2018, leads to the following static checker warning:
drivers/gpu/drm/xen/xen_drm_front_gem.c:140 xen_drm_front_gem_create() warn: passing zero to 'ERR_CAST'
drivers/gpu/drm/xen/xen_drm_front_gem.c 133 struct drm_gem_object *xen_drm_front_gem_create(struct drm_device *dev, 134 size_t size) 135 { 136 struct xen_gem_object *xen_obj; 137 138 xen_obj = gem_create(dev, size); 139 if (IS_ERR_OR_NULL(xen_obj)) 140 return ERR_CAST(xen_obj);
Fix this and the rest of misused places with IS_ERR_OR_NULL in the driver.
Fixes: c575b7eeb89f: "drm/xen-front: Add support for Xen PV display frontend"
Signed-off-by: Oleksandr Andrushchenko oleksandr_andrushchenko@epam.com Reported-by: Dan Carpenter dan.carpenter@oracle.com Reviewed-by: Dan Carpenter dan.carpenter@oracle.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20200813062113.11030-3-andr2000@gmail.com Signed-off-by: Juergen Gross jgross@suse.com [sudip: adjust context] Signed-off-by: Sudip Mukherjee sudipm.mukherjee@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/xen/xen_drm_front.c | 2 +- drivers/gpu/drm/xen/xen_drm_front_gem.c | 8 ++++---- drivers/gpu/drm/xen/xen_drm_front_kms.c | 2 +- 3 files changed, 6 insertions(+), 6 deletions(-)
--- a/drivers/gpu/drm/xen/xen_drm_front.c +++ b/drivers/gpu/drm/xen/xen_drm_front.c @@ -410,7 +410,7 @@ static int xen_drm_drv_dumb_create(struc args->size = args->pitch * args->height;
obj = xen_drm_front_gem_create(dev, args->size); - if (IS_ERR_OR_NULL(obj)) { + if (IS_ERR(obj)) { ret = PTR_ERR(obj); goto fail; } --- a/drivers/gpu/drm/xen/xen_drm_front_gem.c +++ b/drivers/gpu/drm/xen/xen_drm_front_gem.c @@ -85,7 +85,7 @@ static struct xen_gem_object *gem_create
size = round_up(size, PAGE_SIZE); xen_obj = gem_create_obj(dev, size); - if (IS_ERR_OR_NULL(xen_obj)) + if (IS_ERR(xen_obj)) return xen_obj;
if (drm_info->front_info->cfg.be_alloc) { @@ -119,7 +119,7 @@ static struct xen_gem_object *gem_create */ xen_obj->num_pages = DIV_ROUND_UP(size, PAGE_SIZE); xen_obj->pages = drm_gem_get_pages(&xen_obj->base); - if (IS_ERR_OR_NULL(xen_obj->pages)) { + if (IS_ERR(xen_obj->pages)) { ret = PTR_ERR(xen_obj->pages); xen_obj->pages = NULL; goto fail; @@ -138,7 +138,7 @@ struct drm_gem_object *xen_drm_front_gem struct xen_gem_object *xen_obj;
xen_obj = gem_create(dev, size); - if (IS_ERR_OR_NULL(xen_obj)) + if (IS_ERR(xen_obj)) return ERR_CAST(xen_obj);
return &xen_obj->base; @@ -196,7 +196,7 @@ xen_drm_front_gem_import_sg_table(struct
size = attach->dmabuf->size; xen_obj = gem_create_obj(dev, size); - if (IS_ERR_OR_NULL(xen_obj)) + if (IS_ERR(xen_obj)) return ERR_CAST(xen_obj);
ret = gem_alloc_pages_array(xen_obj, size); --- a/drivers/gpu/drm/xen/xen_drm_front_kms.c +++ b/drivers/gpu/drm/xen/xen_drm_front_kms.c @@ -59,7 +59,7 @@ fb_create(struct drm_device *dev, struct int ret;
fb = drm_gem_fb_create_with_funcs(dev, filp, mode_cmd, &fb_funcs); - if (IS_ERR_OR_NULL(fb)) + if (IS_ERR(fb)) return fb;
gem_obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);