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gianfar: Wait for both RX and TX to stop 

When gracefully stopping the controller, the driver was continuing if
*either* RX or TX had stopped.  We need to wait for both, or the
controller could get into an invalid state.

Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Andy Fleming 2010-04-27 16:43:31 -07:00 committed by David S. Miller
parent d87ff58fda
commit 761ed01b35
1 changed files with 3 additions and 3 deletions
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6
drivers/net/gianfar.c
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@ -1511,9 +1511,9 @@ static void gfar_halt_nodisable(struct net_device *dev)
tempval |= (DMACTRL_GRS | DMACTRL_GTS);
gfar_write(&regs->dmactrl, tempval);
while (!(gfar_read(&regs->ievent) &
(IEVENT_GRSC | IEVENT_GTSC)))
cpu_relax();
spin_event_timeout(((gfar_read(&regs->ievent) &
(IEVENT_GRSC | IEVENT_GTSC)) ==
(IEVENT_GRSC | IEVENT_GTSC)), -1, 0);
}
}