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ALSA: emu10k1: remove pointless locks from /proc code 

emu_lock locks the card's registers, but that's necessary only for
multi-register access, incl. read-modify-write cycles.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230428095941.1706278-3-oswald.buddenhagen@gmx.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Oswald Buddenhagen 2023-04-28 11:59:37 +02:00 committed by Takashi Iwai
parent 16cafbd977
commit 71781147da
1 changed files with 0 additions and 6 deletions
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6
sound/pci/emu10k1/emuproc.c
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@ -399,13 +399,10 @@ static void snd_emu_proc_io_reg_read(struct snd_info_entry *entry,
{
struct snd_emu10k1 *emu = entry->private_data;
unsigned long value;
unsigned long flags;
int i;
snd_iprintf(buffer, "IO Registers:\n\n");
for(i = 0; i < 0x40; i+=4) {
spin_lock_irqsave(&emu->emu_lock, flags);
value = inl(emu->port + i);
spin_unlock_irqrestore(&emu->emu_lock, flags);
snd_iprintf(buffer, "%02X: %08lX\n", i, value);
}
}
@ -414,16 +411,13 @@ static void snd_emu_proc_io_reg_write(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_emu10k1 *emu = entry->private_data;
unsigned long flags;
char line[64];
u32 reg, val;
while (!snd_info_get_line(buffer, line, sizeof(line))) {
if (sscanf(line, "%x %x", &reg, &val) != 2)
continue;
if (reg < 0x40 && val <= 0xffffffff) {
spin_lock_irqsave(&emu->emu_lock, flags);
outl(val, emu->port + (reg & 0xfffffffc));
spin_unlock_irqrestore(&emu->emu_lock, flags);
}
}
}