RDMA/bnxt_re: Avoid repeated requests to allocate WC pages

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Applications can request multiple WC pages for the same ucontext.
As of now, only 1 WC page per ucontext is supported. Add a lock to
avoid concurrent access and a check to fail repeated requests.
Also, if the mmap entry insert fails for the WC, free the Doorbell
page index mapped for the WC page.

Fixes: eee6268421 ("RDMA/bnxt_re: Move the UAPI methods to a dedicated file")
Fixes: 360da60d6c ("RDMA/bnxt_re: Enable low latency push")
Link: https://patch.msgid.link/r/20260615224751.232802-12-selvin.xavier@broadcom.com
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Selvin Xavier 2026-06-15 15:47:47 -07:00 • committed by Jason Gunthorpe

parent 87267803a8

commit 441baa7904

3 changed files with 29 additions and 6 deletions

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1

drivers/infiniband/hw/bnxt_re/ib_verbs.c

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drivers/infiniband/hw/bnxt_re/ib_verbs.h

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33

drivers/infiniband/hw/bnxt_re/uapi.c

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