[PATCH 15/18] ALSA: trident: Use DIV_ROUND_CLOSEST() instead of open-coding it
Lars-Peter Clausen
lars at metafoo.de
Wed Dec 23 18:22:26 CET 2020
Use DIV_ROUND_CLOSEST() instead of open-coding it. This documents intent
and makes it more clear what is going on for the casual reviewer.
Generated using the following the Coccinelle semantic patch.
// <smpl>
@@
expression x, y;
@@
-((x) + ((y) / 2)) / (y)
+DIV_ROUND_CLOSEST(x, y)
@r1@
expression x;
constant C1;
constant C2;
@@
((x) + C1) / C2
@script:python@
C1 << r1.C1;
C2 << r1.C2;
@@
try:
if int(C1) * 2 != int(C2):
cocci.include_match(False)
except:
cocci.include_match(False)
@@
expression r1.x;
constant r1.C1;
constant r1.C2;
@@
-(((x) + C1) / C2)
+DIV_ROUND_CLOSEST(x, C2)
// </smpl>
Signed-off-by: Lars-Peter Clausen <lars at metafoo.de>
---
sound/pci/trident/trident_main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/pci/trident/trident_main.c b/sound/pci/trident/trident_main.c
index 6e50376163a2..8d0d0d8335ec 100644
--- a/sound/pci/trident/trident_main.c
+++ b/sound/pci/trident/trident_main.c
@@ -678,7 +678,7 @@ static unsigned int snd_trident_convert_rate(unsigned int rate)
else if (rate == 48000)
delta = 0x1000;
else
- delta = (((rate << 12) + 24000) / 48000) & 0x0000ffff;
+ delta = DIV_ROUND_CLOSEST(rate << 12, 48000) & 0x0000ffff;
return delta;
}
@@ -1034,7 +1034,7 @@ static int snd_trident_capture_prepare(struct snd_pcm_substream *substream)
ESO_bytes++;
// Set channel sample rate, 4.12 format
- val = (((unsigned int) 48000L << 12) + (runtime->rate/2)) / runtime->rate;
+ val = DIV_ROUND_CLOSEST(48000U << 12, runtime->rate);
outw(val, TRID_REG(trident, T4D_SBDELTA_DELTA_R));
// Set channel interrupt blk length
--
2.20.1
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