From: Qing Wang <wangqing@vivo.com>
To: Thierry Reding <thierry.reding@gmail.com>,
Sam Ravnborg <sam@ravnborg.org>, David Airlie <airlied@linux.ie>,
Daniel Vetter <daniel@ffwll.ch>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Cc: Qing Wang <wangqing@vivo.com>
Subject: [PATCH] drm: panel: replace snprintf in show functions with sysfs_emit
Date: Thu, 14 Oct 2021 23:48:10 -0700 [thread overview]
Message-ID: <1634280490-4429-1-git-send-email-wangqing@vivo.com> (raw)
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>
---
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 5fbfb71..a8efb06 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);
--
2.7.4
next reply other threads:[~2021-10-15 6:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-15 6:48 Qing Wang [this message]
2021-10-15 11:11 ` [PATCH] drm: panel: replace snprintf in show functions with sysfs_emit Sebastian Reichel
2021-10-15 18:16 ` Sam Ravnborg
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