linux-kernel - [PATCH] RDMA/bnxt_re: fix dma_free

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Message-ID: <20251230085121.8023-2-fourier.thomas@gmail.com>
Date: Tue, 30 Dec 2025 09:51:21 +0100
From: Thomas Fourier <fourier.thomas@...il.com>
To: 
Cc: Thomas Fourier <fourier.thomas@...il.com>,
	stable@...r.kernel.org,
	Selvin Xavier <selvin.xavier@...adcom.com>,
	Kalesh AP <kalesh-anakkur.purayil@...adcom.com>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Leon Romanovsky <leon@...nel.org>,
	Somnath Kotur <somnath.kotur@...adcom.com>,
	Eddie Wai <eddie.wai@...adcom.com>,
	Sriharsha Basavapatna <sriharsha.basavapatna@...adcom.com>,
	linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] RDMA/bnxt_re: fix dma_free_coherent() pointer

The dma_alloc_coherent() allocates a dma-mapped buffer, pbl->pg_arr[i].
The dma_free_coherent() should pass the same buffer to
dma_free_coherent() and not page-aligned.

Fixes: 1ac5a4047975 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Cc: <stable@...r.kernel.org>
Signed-off-by: Thomas Fourier <fourier.thomas@...il.com>
---
 drivers/infiniband/hw/bnxt_re/qplib_res.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_res.c b/drivers/infiniband/hw/bnxt_re/qplib_res.c
index 875d7b52c06a..866dc22a2ab8 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_res.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_res.c
@@ -64,9 +64,7 @@ static void __free_pbl(struct bnxt_qplib_res *res, struct bnxt_qplib_pbl *pbl,
 		for (i = 0; i < pbl->pg_count; i++) {
 			if (pbl->pg_arr[i])
 				dma_free_coherent(&pdev->dev, pbl->pg_size,
-						  (void *)((unsigned long)
-						   pbl->pg_arr[i] &
-						  PAGE_MASK),
+						  pbl->pg_arr[i],
 						  pbl->pg_map_arr[i]);
 			else
 				dev_warn(&pdev->dev,
-- 
2.43.0