tg3: Add APE register access locking

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If the driver resets the chip while the APE is performing a register
access, that register access will never complete and the APE will hang
indefinitely.  To prevent this race condition, the driver must acquire
an APE mutex before resetting the chip.  The APE will not attempt a
register access until it acquires this lock.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Matt Carlson 2008-08-15 14:07:24 -07:00 • committed by David S. Miller

parent c6153b5b77

commit 77b483f132

2 changed files with 7 additions and 0 deletions

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6

drivers/net/tg3.c

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1

drivers/net/tg3.h

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