From: Adrián Larumbe <adrian.larumbe@collabora.com>
To: Boris Brezillon <boris.brezillon@collabora.com>,
Rob Herring <robh@kernel.org>,
Steven Price <steven.price@arm.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
Collabora Kernel Team <kernel@collabora.com>,
Adrián Larumbe <adrian.larumbe@collabora.com>
Subject: [PATCH 3/4] drm/panfrost: Prevent division by 0
Date: Tue, 26 May 2026 00:03:37 +0100 [thread overview]
Message-ID: <20260526-claude-fixes-v1-3-16e92eaa4949@collabora.com> (raw)
In-Reply-To: <20260526-claude-fixes-v1-0-16e92eaa4949@collabora.com>
When updating and debug-printing devfreq stats, in the very unlikely
offchance that total device time is less than 100 ns, clamp it to 0 to
avoid division by 0.
Signed-off-by: Adrián Larumbe <adrian.larumbe@collabora.com>
---
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index b51c30778811..e34de47bf43b 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -78,7 +78,8 @@ static int panfrost_devfreq_get_dev_status(struct device *dev,
dev_dbg(pfdev->base.dev, "busy %lu total %lu %lu %% freq %lu MHz\n",
status->busy_time, status->total_time,
- status->busy_time / (status->total_time / 100),
+ status->total_time >= 100 ?
+ status->busy_time / (status->total_time / 100) : 0,
status->current_frequency / 1000 / 1000);
return 0;
--
2.53.0
next prev parent reply other threads:[~2026-05-25 23:04 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-25 23:03 [PATCH 0/4] RPM, percnt and other minor fixes for Panfrost Adrián Larumbe
2026-05-25 23:03 ` [PATCH 1/4] drm/panfrost: Check another bo field for cache option query Adrián Larumbe
2026-05-27 5:22 ` Claude review: " Claude Code Review Bot
2026-05-25 23:03 ` [PATCH 2/4] drm/panfrost: Make reset sequence deal with an active HWPerf session Adrián Larumbe
2026-05-27 5:22 ` Claude review: " Claude Code Review Bot
2026-05-25 23:03 ` Adrián Larumbe [this message]
2026-05-27 5:22 ` Claude review: drm/panfrost: Prevent division by 0 Claude Code Review Bot
2026-05-25 23:03 ` [PATCH 4/4] drm/panfrost: Fix RPM so device suspends when no jobs are in flight Adrián Larumbe
2026-05-27 5:22 ` Claude review: " Claude Code Review Bot
2026-05-27 5:22 ` Claude review: RPM, percnt and other minor fixes for Panfrost Claude Code Review Bot
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