[PATCH] coccinelle: api: fix device_attr_show.cocci warnings

[kernel test robot <lkp@intel.com>]

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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Denis Efremov <efremov@linux.com>
CC: Julia Lawall <Julia.Lawall@lip6.fr>
CC: Frank Li <Frank.li@nxp.com>
CC: Will Deacon <will@kernel.org>
CC: Mark Rutland <mark.rutland@arm.com>
CC: Shawn Guo <shawnguo@kernel.org>
CC: Sascha Hauer <s.hauer@pengutronix.de>
CC: Pengutronix Kernel Team <kernel@pengutronix.de>
CC: Fabio Estevam <festevam@gmail.com>
CC: NXP Linux Team <linux-imx@nxp.com>

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

drivers/perf/fsl_imx8_ddr_perf.c:119:8-16: WARNING: use scnprintf or sprintf


 From Documentation/filesystems/sysfs.txt:
  show() must not use snprintf() when formatting the value to be
  returned to user space. If you can guarantee that an overflow
  will never happen you can use sprintf() otherwise you must use
  scnprintf().

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

Fixes: abfc19ff202d ("coccinelle: api: add device_attr_show script")
CC: Denis Efremov <efremov@linux.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
---

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   b65054597872ce3aefbc6a666385eabdf9e288da
commit: abfc19ff202d287742483e15fd478ddd6ada2187 coccinelle: api: add device_attr_show script
:::::: branch date: 22 hours ago
:::::: commit date: 4 months ago

Please take the patch only if it's a positive warning. Thanks!

 fsl_imx8_ddr_perf.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/perf/fsl_imx8_ddr_perf.c
+++ b/drivers/perf/fsl_imx8_ddr_perf.c
@@ -116,7 +116,7 @@ static ssize_t ddr_perf_filter_cap_show(
 		container_of(attr, struct dev_ext_attribute, attr);
 	int cap = (long)ea->var;
 
-	return snprintf(buf, PAGE_SIZE, "%u\n",
+	return scnprintf(buf, PAGE_SIZE, "%u\n",
 			ddr_perf_filter_cap_get(pmu, cap));
 }