gve: Add adminq mutex lock

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We were depending on the rtnl_lock to make sure there is only one adminq
command running at a time. But some commands may take too long to hold
the rtnl_lock, such as the upcoming flow steering operations. For such
situations, it can temporarily drop the rtnl_lock, and replace it for
these operations with a new adminq lock, which can ensure the adminq
command execution to be thread-safe.

Signed-off-by: Ziwei Xiao <ziweixiao@google.com>
Reviewed-by: Praveen Kaligineedi <pkaligineedi@google.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20240625001232.1476315-2-ziweixiao@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Ziwei Xiao 2024-06-25 00:12:27 +00:00 • committed by Jakub Kicinski

parent 63173885cc

commit 1108566ca5

2 changed files with 13 additions and 10 deletions

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1

drivers/net/ethernet/google/gve/gve.h

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22

drivers/net/ethernet/google/gve/gve_adminq.c

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