From: I Hsin Cheng <richard120310@gmail.com>
To: neil.armstrong@linaro.org
Cc: maarten.lankhorst@linux.intel.com, mripard@kernel.org,
tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch,
khilman@baylibre.com, jbrunet@baylibre.com,
martin.blumenstingl@googlemail.com,
dri-devel@lists.freedesktop.org,
linux-amlogic@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, skhan@linuxfoundation.org,
I Hsin Cheng <richard120310@gmail.com>
Subject: [PATCH] drm/meson: Cast mode->clock to unsigned long long
Date: Wed, 30 Apr 2025 03:07:24 +0800 [thread overview]
Message-ID: <20250429190724.330883-1-richard120310@gmail.com> (raw)
Coverity scan reported the usage of "mode->clock * 1000" may lead to
integer overflow. Cast the type of "mode->clock" to "unsigned long long"
when utilizing it to avoid potential integer overflow issue.
Link: https://scan5.scan.coverity.com/#/project-view/10074/10063?selectedIssue=1646759
Signed-off-by: I Hsin Cheng <richard120310@gmail.com>
---
drivers/gpu/drm/meson/meson_encoder_hdmi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/meson/meson_encoder_hdmi.c b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
index 7752d8ac85f0..fe3d3ff7c432 100644
--- a/drivers/gpu/drm/meson/meson_encoder_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
@@ -75,7 +75,7 @@ static void meson_encoder_hdmi_set_vclk(struct meson_encoder_hdmi *encoder_hdmi,
unsigned long long venc_freq;
unsigned long long hdmi_freq;
- vclk_freq = mode->clock * 1000;
+ vclk_freq = (unsigned long long) mode->clock * 1000;
/* For 420, pixel clock is half unlike venc clock */
if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24)
@@ -123,7 +123,7 @@ static enum drm_mode_status meson_encoder_hdmi_mode_valid(struct drm_bridge *bri
struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
struct meson_drm *priv = encoder_hdmi->priv;
bool is_hdmi2_sink = display_info->hdmi.scdc.supported;
- unsigned long long clock = mode->clock * 1000;
+ unsigned long long clock = (unsigned long long) mode->clock * 1000;
unsigned long long phy_freq;
unsigned long long vclk_freq;
unsigned long long venc_freq;
--
2.43.0
_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic
next reply other threads:[~2025-04-29 19:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-29 19:07 I Hsin Cheng [this message]
2025-04-29 21:00 ` Christophe JAILLET
2025-05-04 21:06 ` Martin Blumenstingl
2025-05-05 12:43 ` I Hsin Cheng
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250429190724.330883-1-richard120310@gmail.com \
--to=richard120310@gmail.com \
--cc=airlied@gmail.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=jbrunet@baylibre.com \
--cc=khilman@baylibre.com \
--cc=linux-amlogic@lists.infradead.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=maarten.lankhorst@linux.intel.com \
--cc=martin.blumenstingl@googlemail.com \
--cc=mripard@kernel.org \
--cc=neil.armstrong@linaro.org \
--cc=simona@ffwll.ch \
--cc=skhan@linuxfoundation.org \
--cc=tzimmermann@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®