Commit 2e9bd50f authored by Oswald Buddenhagen's avatar Oswald Buddenhagen Committed by Takashi Iwai
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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: default avatarOswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230514170323.3408798-4-oswald.buddenhagen@gmx.de


Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 2093dcfc

sound/pci/emu10k1/io.c

+2 −2
Original line number Diff line number Diff line
@@ -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;

	}