| Message ID | 20240415-fix-cocci-v1-25-477afb23728b@chromium.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | media: Fix coccinelle warning/errors | expand |
On Mon, Apr 15, 2024 at 07:34:42PM +0000, Ricardo Ribalda wrote: > us_per_frame does not fit in u32 > drivers/media/platform/qcom/venus/venc.c 391 static int venc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 392 { 393 struct venus_inst *inst = to_inst(file); 394 struct v4l2_outputparm *out = &a->parm.output; 395 struct v4l2_fract *timeperframe = &out->timeperframe; 396 u64 us_per_frame, fps; 397 398 if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT && 399 a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 400 return -EINVAL; 401 402 memset(out->reserved, 0, sizeof(out->reserved)); 403 404 if (!timeperframe->denominator) 405 timeperframe->denominator = inst->timeperframe.denominator; 406 if (!timeperframe->numerator) 407 timeperframe->numerator = inst->timeperframe.numerator; 408 409 out->capability = V4L2_CAP_TIMEPERFRAME; 410 411 us_per_frame = timeperframe->numerator * (u64)USEC_PER_SEC; ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ It looks like in some drivers this multiply can go over U32_MAX. 412 do_div(us_per_frame, timeperframe->denominator); ^^^^^^^^^^^^ But after this divide, then we're under 1,000,000 again. Otherwise the FPS is zero. So maybe the right thing to do is: inst->fps = USEC_PER_SEC / (u32)us_per_frame; 413 414 if (!us_per_frame) 415 return -EINVAL; 416 417 fps = (u64)USEC_PER_SEC; 418 do_div(fps, us_per_frame); 419 420 inst->timeperframe = *timeperframe; 421 inst->fps = fps; 422 423 return 0; 424 } regards, dan carpenter
diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c index 3ec2fb8d9fab..de06e1712d09 100644 --- a/drivers/media/platform/qcom/venus/venc.c +++ b/drivers/media/platform/qcom/venus/venc.c @@ -393,7 +393,7 @@ static int venc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) struct venus_inst *inst = to_inst(file); struct v4l2_outputparm *out = &a->parm.output; struct v4l2_fract *timeperframe = &out->timeperframe; - u64 us_per_frame, fps; + u64 us_per_frame; if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT && a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) @@ -414,11 +414,8 @@ static int venc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) if (!us_per_frame) return -EINVAL; - fps = (u64)USEC_PER_SEC; - do_div(fps, us_per_frame); - + inst->fps = div64_u64(USEC_PER_SEC, us_per_frame); inst->timeperframe = *timeperframe; - inst->fps = fps; return 0; }
us_per_frame does not fit in u32 Found with cocci: drivers/media/platform/qcom/venus/venc.c:418:1-7: WARNING: do_div() does a 64-by-32 division, please consider using div64_u64 instead. Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> --- drivers/media/platform/qcom/venus/venc.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)