https://github.com/torvalds/linux
Revision edc4a67e15e34d2b3a2ab968625fd157751125d8 authored by Jack Morgenstein on 24 May 2012, 13:08:09 UTC, committed by Roland Dreier on 06 June 2012, 17:07:54 UTC
Commit 096335b3f983 ("mlx4_core: Allow dynamic MTU configuration for
IB ports") modifies the port VL setting. This exposes a bug in
mlx4_common_set_port(), where the VL cap value passed in (inside the
command mailbox) is incorrectly zeroed-out:
mlx4_SET_PORT modifies the VL_cap field (byte 3 of the mailbox).
Since the SET_PORT command is paravirtualized on the master as well as
on the slaves, mlx4_SET_PORT_wrapper() is invoked on the master. This
calls mlx4_common_set_port() where mailbox byte 3 gets overwritten by
code which should only set a single bit in that byte (for the reset
qkey counter flag) -- but instead overwrites the entire byte.
The result is that when running in SR-IOV mode, the VL_cap will be set
to zero -- fix this.
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
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Tip revision: edc4a67e15e34d2b3a2ab968625fd157751125d8 authored by Jack Morgenstein on 24 May 2012, 13:08:09 UTC
mlx4_core: Fix setting VL_cap in mlx4_SET_PORT wrapper flow
mlx4_core: Fix setting VL_cap in mlx4_SET_PORT wrapper flow
Tip revision: edc4a67
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| .gitignore | -rw-r--r-- | 1014 bytes |
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| CREDITS | -rw-r--r-- | 92.8 KB |
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