From: Geert Uytterhoeven <[email protected]>
commit e7c22eeaff8565d9a8374f320238c251ca31480b upstream.
As snd_ff.rx_bytes[] is unsigned int, and NSEC_PER_SEC is 1000000000L,
the second multiplication in
ff->rx_bytes[port] * 8 * NSEC_PER_SEC / 31250
always overflows on 32-bit platforms, truncating the result. Fix this
by precalculating "NSEC_PER_SEC / 31250", which is an integer constant.
Note that this assumes ff->rx_bytes[port] <= 16777.
Fixes: 19174295788de77d ("ALSA: fireface: add transaction support")
Reviewed-by: Takashi Sakamoto <[email protected]>
Signed-off-by: Geert Uytterhoeven <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
sound/firewire/fireface/ff-transaction.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/sound/firewire/fireface/ff-transaction.c
+++ b/sound/firewire/fireface/ff-transaction.c
@@ -99,7 +99,7 @@ static void transmit_midi_msg(struct snd
/* Set interval to next transaction. */
ff->next_ktime[port] = ktime_add_ns(ktime_get(),
- len * 8 * NSEC_PER_SEC / 31250);
+ len * 8 * (NSEC_PER_SEC / 31250));
ff->rx_bytes[port] = len;
/*
