RDMA/bnxt_re: Change the sequence of updating the CQ toggle value

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Currently the CQ toggle value in the shared page (read by the userlib) is
updated as part of the cqn_handler. There is a potential race of
application calling the CQ ARM doorbell immediately and using the old
toggle value.

Change the sequence of updating CQ toggle value to update in the
bnxt_qplib_service_nq function immediately after reading the toggle value
to be in sync with the HW updated value.

Fixes: e275919d96 ("RDMA/bnxt_re: Share a page to expose per CQ info with userspace")
Link: https://patch.msgid.link/r/1728373302-19530-9-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Reviewed-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Chandramohan Akula 2024-10-08 00:41:40 -07:00 • committed by Jason Gunthorpe

parent a5e099e0c4

commit 2df411353d

2 changed files with 6 additions and 7 deletions

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8

drivers/infiniband/hw/bnxt_re/main.c

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5

drivers/infiniband/hw/bnxt_re/qplib_fp.c

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