b44: abort when no PHY is available at all

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When the phy address is 31, this means that there is no PHY connected
to this MAC at all, no internal and no external PHY. Reading these PHY
registers causes a system reset on some routers.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Hauke Mehrtens 2013-12-20 02:16:08 +01:00 • committed by David S. Miller

parent 5ab6329c52

commit 7befa6abe0

2 changed files with 7 additions and 0 deletions

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6

drivers/net/ethernet/broadcom/b44.c

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1

drivers/net/ethernet/broadcom/b44.h

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