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ALSA: emu10k1: fix 64-bit integer division

Message ID 20230517201920.592909-1-arnd@kernel.org
State New
Headers show
Series ALSA: emu10k1: fix 64-bit integer division | expand

Commit Message

Arnd Bergmann May 17, 2023, 8:19 p.m. UTC 
From: Arnd Bergmann <arnd@arndb.de>

Division of 64-bit values causes a link failure on 32-bit targets, depending
on compiler version and target architecture:

ERROR: modpost: "__divdi3" [sound/pci/emu10k1/snd-emu10k1.ko] undefined!
ERROR: modpost: "__udivdi3" [sound/pci/emu10k1/snd-emu10k1.ko] undefined!

Replace these with the safe div_u64() helpers.

Fixes: bb5ceb43b7bf ("ALSA: emu10k1: fix non-zero mixer control defaults in highres mode")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 sound/pci/emu10k1/emufx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/sound/pci/emu10k1/emufx.c b/sound/pci/emu10k1/emufx.c
index f64b2b4eb348..7c28789720d1 100644
--- a/sound/pci/emu10k1/emufx.c
+++ b/sound/pci/emu10k1/emufx.c
@@ -1156,7 +1156,7 @@  snd_emu10k1_init_mono_control(struct snd_emu10k1_fx8010_control_gpr *ctl,
 		ctl->max = 0x7fffffff;
 		ctl->tlv = snd_emu10k1_db_linear;
 		ctl->translation = EMU10K1_GPR_TRANSLATION_NEGATE;
-		defval = defval * 0x80000000LL / 100 - 1;
+		defval = div_u64(defval * 0x80000000LL, 100) - 1;
 	} else {
 		ctl->min = 0;
 		ctl->max = 100;
@@ -1178,7 +1178,7 @@  snd_emu10k1_init_stereo_control(struct snd_emu10k1_fx8010_control_gpr *ctl,
 		ctl->max = 0x7fffffff;
 		ctl->tlv = snd_emu10k1_db_linear;
 		ctl->translation = EMU10K1_GPR_TRANSLATION_NEGATE;
-		defval = defval * 0x80000000LL / 100 - 1;
+		defval = div_u64(defval * 0x80000000LL, 100) - 1;
 	} else {
 		ctl->min = 0;
 		ctl->max = 100;