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[PATCH] smc91x: fix bank mismatch

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The smc91x driver relies upon register bank 2 being selected whenever
the interrupt handler is called.  This isn't always so, especially if
we have a link change event during PHY configuration.

This results in register bank 0 being selected when the interrupt
handler is called, causing the wrong registers to be read for the
IRQ mask and status.  In turn, this causes us to spin with a
permanently asserted IRQ.

The patch ensures that smc_phy_configure always exits with register
bank 2 selected.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Russell King 2005-11-18 12:57:55 -05:00 committed by Jeff Garzik
parent 5d0571d915
commit e52542443a
1 changed files with 1 additions and 0 deletions
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drivers/net/smc91x.c
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@ -1212,6 +1212,7 @@ static void smc_phy_configure(void *data)
smc_phy_check_media(dev, 1);
smc_phy_configure_exit:
SMC_SELECT_BANK(2);
spin_unlock_irq(&lp->lock);
lp->work_pending = 0;
}