On Mon, Apr 28, 2025 at 12:17:54PM +0100, Lad, Prabhakar wrote: > On Mon, Apr 28, 2025 at 10:59 AM Laurent Pinchart wrote: > > On Mon, Apr 28, 2025 at 10:52:08AM +0100, Prabhakar wrote: > > > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> > > > > > > Simplify the `rzg2l_fifo_empty()` helper by removing the redundant > > > comparison in the return path. Now the function explicitly returns `true` > > > if the FIFO write and read pointers match, and `false` otherwise, improving > > > readability without changing behavior. > > > > > > Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> > > > Closes: https://lore.kernel.org/all/aAtQThCibZCROETx@stanley.mountain/ > > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> > > > --- > > > drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c | 2 +- > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c > > > index 067c6af14e95..97faefcd6019 100644 > > > --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c > > > +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c > > > @@ -348,7 +348,7 @@ bool rzg2l_fifo_empty(struct rzg2l_cru_dev *cru) > > > if (amnfifopntr_w == amnfifopntr_r_y) > > > return true; > > > > > > - return amnfifopntr_w == amnfifopntr_r_y; > > > + return false; > > > > So the function always returned true. This seems to be a bug fix, please > > add a Fixes: tag. The commit message should also make it clear that > > you're fixing an issue, not just simplifying the code. > > No, the function returned true only if the pointers matched; > otherwise, amnfifopntr_w == amnfifopntr_r_y would return false. I was > simply removing the repetitive pointer check and directly returning > false at the end of the function, as we can be certain at that point. > Hence, I did not add a Fixes tag. Am I missing something? Oops, you're right, my bad. > > Personally I'd have written > > > > diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c > > index 067c6af14e95..3d0810b3c35e 100644 > > --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c > > +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c > > @@ -345,8 +345,6 @@ bool rzg2l_fifo_empty(struct rzg2l_cru_dev *cru) > > amnfifopntr_w = amnfifopntr & AMnFIFOPNTR_FIFOWPNTR; > > amnfifopntr_r_y = > > (amnfifopntr & AMnFIFOPNTR_FIFORPNTR_Y) >> 16; > > - if (amnfifopntr_w == amnfifopntr_r_y) > > - return true; > > > > return amnfifopntr_w == amnfifopntr_r_y; > > } > > > > but that's also a bit of a style preference. > > I wanted to keep this consistent with the rz3e_fifo_empty(). If you > prefer the above I'll do that in v2. Up to you. -- Regards, Laurent Pinchart
