Re: [PATCH] drm/nouveau/gem: Use vmemdup_user() rather than duplicating its implementation

Re: [PATCH] drm/nouveau/gem: Use vmemdup_user() rather than duplicating its implementation

[kernel test robot]

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Hi Markus,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on drm-tip/drm-tip tegra-drm/drm/tegra/for-next linus/master drm/drm-next drm-exynos/exynos-drm-next v5.8 next-20200812]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Markus-Elfring/drm-nouveau-gem-Use-vmemdup_user-rather-than-duplicating-its-implementation/20200812-150757
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: x86_64-randconfig-c002-20200811 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


coccinelle warnings: (new ones prefixed by >>)

>> drivers/gpu/drm/nouveau/nouveau_gem.c:589:9-16: WARNING: ERR_CAST can be used with mem

Please review and possibly fold the followup patch.

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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[PATCH] drm/nouveau/gem: fix err_cast.cocci warnings

[kernel test robot]

From: kernel test robot <lkp@intel.com>

drivers/gpu/drm/nouveau/nouveau_gem.c:589:9-16: WARNING: ERR_CAST can be used with mem


 Use ERR_CAST inlined function instead of ERR_PTR(PTR_ERR(...))

Generated by: scripts/coccinelle/api/err_cast.cocci

CC: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: kernel test robot <lkp@intel.com>
---

url:    https://github.com/0day-ci/linux/commits/Markus-Elfring/drm-nouveau-gem-Use-vmemdup_user-rather-than-duplicating-its-implementation/20200812-150757
base:   git://anongit.freedesktop.org/drm-intel for-linux-next

 nouveau_gem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/nouveau/nouveau_gem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
@@ -586,7 +586,7 @@ u_memcpya(uint64_t user, unsigned nmemb,
 	size *= nmemb;
 	mem = vmemdup_user(userptr, size);
 	if (IS_ERR(mem))
-		return ERR_PTR(PTR_ERR(mem));
+		return ERR_CAST(mem);
 
 	return mem;
 }