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From: Oleksandr Andrushchenko <andr2000@gmail.com>
To: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org,
	dri-devel@lists.freedesktop.org, airlied@linux.ie,
	daniel.vetter@intel.com, seanpaul@chromium.org,
	gustavo@padovan.org, jgross@suse.com, boris.ostrovsky@oracle.com,
	dan.carpenter@oracle.com
Cc: andr2000@gmail.com,
	Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Subject: [PATCH] drm/xen-front: Replace NULL with error value in xen_drm_front_gem_get_sg_table
Date: Fri, 15 Jun 2018 12:54:09 +0300	[thread overview]
Message-ID: <20180615095409.5685-1-andr2000@gmail.com> (raw)

From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>

Dan Carpenter has reported that there is the following static checker
warning:
	drivers/gpu/drm/drm_prime.c:317 drm_gem_map_dma_buf()
	warn: 'sgt' can also be NULL

314	sgt = obj->dev->driver->gem_prime_get_sg_table(obj);
315
316	if (!IS_ERR(sgt)) {
317		if (!dma_map_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,

And one of the problematic functions is xen_drm_front_gem_get_sg_table.
Fix this by replacing NULL with error value.

Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/gpu/drm/xen/xen_drm_front_gem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xen/xen_drm_front_gem.c b/drivers/gpu/drm/xen/xen_drm_front_gem.c
index c85bfe7571cb..47ff019d3aef 100644
--- a/drivers/gpu/drm/xen/xen_drm_front_gem.c
+++ b/drivers/gpu/drm/xen/xen_drm_front_gem.c
@@ -179,7 +179,7 @@ struct sg_table *xen_drm_front_gem_get_sg_table(struct drm_gem_object *gem_obj)
 	struct xen_gem_object *xen_obj = to_xen_gem_obj(gem_obj);
 
 	if (!xen_obj->pages)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	return drm_prime_pages_to_sg(xen_obj->pages, xen_obj->num_pages);
 }
-- 
2.17.1

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WARNING: multiple messages have this Message-ID (diff)
From: Oleksandr Andrushchenko <andr2000@gmail.com>
To: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org,
	dri-devel@lists.freedesktop.org, airlied@linux.ie,
	daniel.vetter@intel.com, seanpaul@chromium.org,
	gustavo@padovan.org, jgross@suse.com, boris.ostrovsky@oracle.com,
	dan.carpenter@oracle.com
Cc: andr2000@gmail.com,
	Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Subject: [PATCH] drm/xen-front: Replace NULL with error value in xen_drm_front_gem_get_sg_table
Date: Fri, 15 Jun 2018 12:54:09 +0300	[thread overview]
Message-ID: <20180615095409.5685-1-andr2000@gmail.com> (raw)

From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>

Dan Carpenter has reported that there is the following static checker
warning:
	drivers/gpu/drm/drm_prime.c:317 drm_gem_map_dma_buf()
	warn: 'sgt' can also be NULL

314	sgt = obj->dev->driver->gem_prime_get_sg_table(obj);
315
316	if (!IS_ERR(sgt)) {
317		if (!dma_map_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir,

And one of the problematic functions is xen_drm_front_gem_get_sg_table.
Fix this by replacing NULL with error value.

Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/gpu/drm/xen/xen_drm_front_gem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xen/xen_drm_front_gem.c b/drivers/gpu/drm/xen/xen_drm_front_gem.c
index c85bfe7571cb..47ff019d3aef 100644
--- a/drivers/gpu/drm/xen/xen_drm_front_gem.c
+++ b/drivers/gpu/drm/xen/xen_drm_front_gem.c
@@ -179,7 +179,7 @@ struct sg_table *xen_drm_front_gem_get_sg_table(struct drm_gem_object *gem_obj)
 	struct xen_gem_object *xen_obj = to_xen_gem_obj(gem_obj);
 
 	if (!xen_obj->pages)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	return drm_prime_pages_to_sg(xen_obj->pages, xen_obj->num_pages);
 }
-- 
2.17.1


             reply	other threads:[~2018-06-15  9:54 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-15  9:54 Oleksandr Andrushchenko [this message]
2018-06-15  9:54 ` [PATCH] drm/xen-front: Replace NULL with error value in xen_drm_front_gem_get_sg_table Oleksandr Andrushchenko
  -- strict thread matches above, loose matches on Subject: below --
2018-06-15  9:54 Oleksandr Andrushchenko

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