RDMA/irdma: Add missing read barriers

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[ Upstream commit 4984eb5145 ]

On code inspection, there are many instances in the driver where
CEQE and AEQE fields written to by HW are read without guaranteeing
that the polarity bit has been read and checked first.

Add a read barrier to avoid reordering of loads on the CEQE/AEQE fields
prior to checking the polarity bit.

Fixes: 3f49d68425 ("RDMA/irdma: Implement HW Admin Queue OPs")
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Link: https://lore.kernel.org/r/20230711175253.1289-2-shiraz.saleem@intel.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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This commit is contained in:

Shiraz Saleem 2023-07-11 12:52:51 -05:00 • committed by Greg Kroah-Hartman

parent 14627d02b1

commit b83e4c1e4c

3 changed files with 17 additions and 1 deletions

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9

drivers/infiniband/hw/irdma/ctrl.c

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6

drivers/infiniband/hw/irdma/puda.c

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3

drivers/infiniband/hw/irdma/uk.c

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