FAILED: patch "[PATCH] media: venus: vdec: Clamp param smaller than 1fps and bigger" failed to apply to 5.4-stable tree

The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y
git checkout FETCH_HEAD
git cherry-pick -x 377dc500d253f0b26732b2cb062e89668aef890a
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2025082106-elevate-boil-beef@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 377dc500d253f0b26732b2cb062e89668aef890a Mon Sep 17 00:00:00 2001
From: Ricardo Ribalda <[email protected]>
Date: Mon, 16 Jun 2025 15:29:14 +0000
Subject: [PATCH] media: venus: vdec: Clamp param smaller than 1fps and bigger
than 240.

The driver uses "whole" fps in all its calculations (e.g. in load_per_instance()). Those calculation expect an fps bigger than 1, and not big enough to overflow.

Clamp the value if the user provides a param that will result in an invalid fps.

index b412e0c5515a..5b1ba1c69adb 100644
@@ -28,6 +28,8 @@
 #define VIDC_RESETS_NUM_MAX		2
 #define VIDC_MAX_HIER_CODING_LAYER 6
 
+#define VENUS_MAX_FPS			240
+
 extern int venus_fw_debug;
 
 struct freq_tbl {

index 99ce5fd41577..fca27be61f4b 100644
@@ -481,11 +481,10 @@ static int vdec_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
 	us_per_frame = timeperframe->numerator * (u64)USEC_PER_SEC;
 	do_div(us_per_frame, timeperframe->denominator);
 
-	if (!us_per_frame)
-		return -EINVAL;
-
+	us_per_frame = clamp(us_per_frame, 1, USEC_PER_SEC);
 	fps = (u64)USEC_PER_SEC;
 	do_div(fps, us_per_frame);
+	fps = min(VENUS_MAX_FPS, fps);
 
 	inst->fps = fps;
 	inst->timeperframe = *timeperframe;

From: Ricardo Ribalda <[email protected]>

[ Upstream commit 377dc500d253f0b26732b2cb062e89668aef890a ]

The driver uses "whole" fps in all its calculations (e.g. in load_per_instance()). Those calculation expect an fps bigger than 1, and not big enough to overflow.

Clamp the value if the user provides a param that will result in an invalid fps.

---
 drivers/media/platform/qcom/venus/core.h | 2 ++
 drivers/media/platform/qcom/venus/vdec.c | 5 ++---
 2 files changed, 4 insertions(+), 3 deletions(-)

index 922cb7e64bfa..03512858c868 100644
@@ -16,6 +16,8 @@
 
 #define VIDC_CLKS_NUM_MAX	4
 
+#define VENUS_MAX_FPS			240
+
 struct freq_tbl {
 	unsigned int load;
 	unsigned long freq;

index a0a67b7132b8..551462e64082 100644
@@ -418,11 +418,10 @@ static int vdec_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
 	us_per_frame = timeperframe->numerator * (u64)USEC_PER_SEC;
 	do_div(us_per_frame, timeperframe->denominator);
 
-	if (!us_per_frame)
-		return -EINVAL;
-
+	us_per_frame = clamp(us_per_frame, 1, USEC_PER_SEC);
 	fps = (u64)USEC_PER_SEC;
 	do_div(fps, us_per_frame);
+	fps = min(VENUS_MAX_FPS, fps);
 
 	inst->fps = fps;
 	inst->timeperframe = *timeperframe;

2.50.1