linux-kernel - [PATCH 5.15 095/121] RDMA/irdma: Report the correct max cqes from query device

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 13 Sep 2022 16:04:46 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sindhu-Devale <sindhu.devale@...el.com>,
        Shiraz Saleem <shiraz.saleem@...el.com>,
        Leon Romanovsky <leon@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 095/121] RDMA/irdma: Report the correct max cqes from query device

From: Sindhu-Devale <sindhu.devale@...el.com>

[ Upstream commit 12faad5e5cf2372af2d51f348b697b5edf838daf ]

Report the correct max cqes available to an application taking
into account a reserved entry to detect overflow.

Fixes: b48c24c2d710 ("RDMA/irdma: Implement device supported verb APIs")
Signed-off-by: Sindhu-Devale <sindhu.devale@...el.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@...el.com>
Link: https://lore.kernel.org/r/20220906223244.1119-2-shiraz.saleem@intel.com
Signed-off-by: Leon Romanovsky <leon@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/infiniband/hw/irdma/verbs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c
index cac4fb228b9b0..adb0e0774256c 100644
--- a/drivers/infiniband/hw/irdma/verbs.c
+++ b/drivers/infiniband/hw/irdma/verbs.c
@@ -36,7 +36,7 @@ static int irdma_query_device(struct ib_device *ibdev,
 	props->max_send_sge = hw_attrs->uk_attrs.max_hw_wq_frags;
 	props->max_recv_sge = hw_attrs->uk_attrs.max_hw_wq_frags;
 	props->max_cq = rf->max_cq - rf->used_cqs;
-	props->max_cqe = rf->max_cqe;
+	props->max_cqe = rf->max_cqe - 1;
 	props->max_mr = rf->max_mr - rf->used_mrs;
 	props->max_mw = props->max_mr;
 	props->max_pd = rf->max_pd - rf->used_pds;
-- 
2.35.1