diff options
| author | Oswald Buddenhagen <[email protected]> | 2023-05-14 19:03:23 +0200 |
|---|---|---|
| committer | Takashi Iwai <[email protected]> | 2023-05-15 22:00:56 +0200 |
| commit | 2e9bd50f117ea3f638802627a196949f7eefcf02 (patch) | |
| tree | 66aa59c2bcba9d538d055158119699d44a4b051d | |
| parent | 2093dcfc04e1477efd47d3acf0adc4582dc5f4f6 (diff) | |
ALSA: emu10k1: optimize mask calculation in snd_emu10k1_ptr_read()
Unlike in snd_emu10k1_ptr_write(), we don't need to keep the value's
bits in place, so we can save one shift.
Signed-off-by: Oswald Buddenhagen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
| -rw-r--r-- | sound/pci/emu10k1/io.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/pci/emu10k1/io.c b/sound/pci/emu10k1/io.c index 2d6bbb77c961..59b0f4d08c6b 100644 --- a/sound/pci/emu10k1/io.c +++ b/sound/pci/emu10k1/io.c @@ -50,9 +50,9 @@ unsigned int snd_emu10k1_ptr_read(struct snd_emu10k1 * emu, unsigned int reg, un size = (reg >> 24) & 0x3f; offset = (reg >> 16) & 0x1f; - mask = ((1 << size) - 1) << offset; + mask = (1 << size) - 1; - return (val & mask) >> offset; + return (val >> offset) & mask; } else { return val; } |