From 8eddea301f6ccbd114635499cfef8d2b7a78fed0 Mon Sep 17 00:00:00 2001
From: Qing Wang <wangqing@vivo.com>
Date: Thu, 14 Oct 2021 23:48:10 -0700
Subject: drm/panel: dsi-cm: replace snprintf in show functions with sysfs_emit
Git-commit: 5f9741f53a3e0e84befc60cc1491272d18564ea0
Patch-mainline: v5.17-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
show() must not use snprintf() when formatting the value to be
returned to user space.
Fix the following coccicheck warning:
drivers/gpu/drm/panel/panel-dsi-cm.c:251: WARNING: use scnprintf or sprintf.
drivers/gpu/drm/panel/panel-dsi-cm.c:271: WARNING: use scnprintf or sprintf.
Use sysfs_emit instead of scnprintf or sprintf makes more sense.
Signed-off-by: Qing Wang <wangqing@vivo.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1634280490-4429-1-git-send-email-wangqing@vivo.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/panel/panel-dsi-cm.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/panel/panel-dsi-cm.c b/drivers/gpu/drm/panel/panel-dsi-cm.c
index da4a69067e18..b58cb064975f 100644
--- a/drivers/gpu/drm/panel/panel-dsi-cm.c
+++ b/drivers/gpu/drm/panel/panel-dsi-cm.c
@@ -248,7 +248,7 @@ static ssize_t num_dsi_errors_show(struct device *dev,
if (r)
return r;
- return snprintf(buf, PAGE_SIZE, "%d\n", errors);
+ return sysfs_emit(buf, "%d\n", errors);
}
static ssize_t hw_revision_show(struct device *dev,
@@ -268,7 +268,7 @@ static ssize_t hw_revision_show(struct device *dev,
if (r)
return r;
- return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3);
+ return sysfs_emit(buf, "%02x.%02x.%02x\n", id1, id2, id3);
}
static DEVICE_ATTR_RO(num_dsi_errors);
--
2.38.1