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authorGavin Shan <shangw@linux.vnet.ibm.com>2013-06-25 15:24:32 +0800
committerDavid S. Miller <davem@davemloft.net>2013-06-25 17:00:40 -0700
commit6d446ec32f169c6a5d9bc90684a8082a6cbe90f6 (patch)
tree5c43bb12f31bbe9ccc96c837349a4ade53256087 /net/core/sock.c
parentdc8482926e2b1006ed6962ac8388cb92aed4efc7 (diff)
downloadlinaro-lsk-6d446ec32f169c6a5d9bc90684a8082a6cbe90f6.tar.gz
net/tg3: Avoid delay during MMIO access
When the EEH error is the result of a fenced host bridge, MMIO accesses can be very slow (milliseconds) to timeout and return all 1's, thus causing the driver various timeout loops to take way too long and trigger soft-lockup warnings (in addition to taking minutes to recover). It might be worthwhile to check if for any of these cases, ffffffff is a valid possible value, and if not, bail early since that means the HW is either gone or isolated. In the meantime, checking that the PCI channel is offline would be workaround of the problem. Cc: <stable@vger.kernel.org> # v3.0+ Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/sock.c')
0 files changed, 0 insertions, 0 deletions