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13 July 2024, 08:20:57 UTC
Revision c5d6136e10d667965e46f998c01863802f7b89c8 authored by Thadeu Lima de Souza Cascardo on 10 October 2011, 06:42:23 UTC, committed by David S. Miller on 10 October 2011, 18:10:37 UTC 
mlx4_en: fix endianness with blue frame support
 
The doorbell register was being unconditionally swapped. In x86, that
meant it was being swapped to BE and written to the descriptor and to
memory, depending on the case of blue frame support or writing to
doorbell register. On PPC, this meant it was being swapped to LE and
then swapped back to BE while writing to the register. But in the blue
frame case, it was being written as LE to the descriptor.

The fix is not to swap doorbell unconditionally, write it to the
register as BE and convert it to BE when writing it to the descriptor.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Reported-by: Richard Hendrickson <richhend@us.ibm.com>
Cc: Eli Cohen <eli@dev.mellanox.co.il>
Cc: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 65112dc
History
Tip revision: c5d6136e10d667965e46f998c01863802f7b89c8 authored by Thadeu Lima de Souza Cascardo on 10 October 2011, 06:42:23 UTC
mlx4_en: fix endianness with blue frame support
Tip revision: c5d6136
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