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tg3: prevent scheduling while atomic splat

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The problem was introduced in commit
506b0a395f ("[netdrv] tg3: APE heartbeat changes"). The bug occurs
because tp->lock spinlock is held which is obtained in tg3_start
by way of tg3_full_lock(), line 11571. The documentation for usleep_range()
specifically states it cannot be used inside a spinlock.

Fixes: 506b0a395f ("[netdrv] tg3: APE heartbeat changes")
Signed-off-by: Jonathan Toppins <jtoppins@redhat.com>
Acked-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jonathan Toppins 2018-03-14 12:36:25 -04:00 committed by David S. Miller
parent d52e5a7e7c
commit ea91df6d8a
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/broadcom/tg3.c
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@ -820,7 +820,7 @@ static int tg3_ape_event_lock(struct tg3 *tp, u32 timeout_us)
tg3_ape_unlock(tp, TG3_APE_LOCK_MEM);
usleep_range(10, 20);
udelay(10);
timeout_us -= (timeout_us > 10) ? 10 : timeout_us;
}