linux-kernel - [PATCH rdma-next v2 2/2] RDMA/mana_ib: use the correct page size for mapping user-mode doorbell page

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Message-Id: <1725030993-16213-2-git-send-email-longli@linuxonhyperv.com>
Date: Fri, 30 Aug 2024 08:16:33 -0700
From: longli@...uxonhyperv.com
To: Jason Gunthorpe <jgg@...pe.ca>,
	Leon Romanovsky <leon@...nel.org>,
	Ajay Sharma <sharmaajay@...rosoft.com>,
	Konstantin Taranov <kotaranov@...rosoft.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: linux-rdma@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Long Li <longli@...rosoft.com>,
	stable@...r.kernel.org
Subject: [PATCH rdma-next v2 2/2] RDMA/mana_ib: use the correct page size for mapping user-mode doorbell page

From: Long Li <longli@...rosoft.com>

When mapping doorbell page from user-mode, the driver should use the system
page size as this memory is allocated via mmap() from user-mode.

Cc: stable@...r.kernel.org
Fixes: 0266a177631d ("RDMA/mana_ib: Add a driver for Microsoft Azure Network Adapter")
Signed-off-by: Long Li <longli@...rosoft.com>
---
change log
v2: used rdma-next tag in patch title. fixed printk format identifier for unsigned long.

 drivers/infiniband/hw/mana/main.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
index f68f54aea820..67c2d43135a8 100644
--- a/drivers/infiniband/hw/mana/main.c
+++ b/drivers/infiniband/hw/mana/main.c
@@ -511,13 +511,13 @@ int mana_ib_mmap(struct ib_ucontext *ibcontext, struct vm_area_struct *vma)
 	      PAGE_SHIFT;
 	prot = pgprot_writecombine(vma->vm_page_prot);
 
-	ret = rdma_user_mmap_io(ibcontext, vma, pfn, gc->db_page_size, prot,
+	ret = rdma_user_mmap_io(ibcontext, vma, pfn, PAGE_SIZE, prot,
 				NULL);
 	if (ret)
 		ibdev_dbg(ibdev, "can't rdma_user_mmap_io ret %d\n", ret);
 	else
-		ibdev_dbg(ibdev, "mapped I/O pfn 0x%llx page_size %u, ret %d\n",
-			  pfn, gc->db_page_size, ret);
+		ibdev_dbg(ibdev, "mapped I/O pfn 0x%llx page_size %lu, ret %d\n",
+			  pfn, PAGE_SIZE, ret);
 
 	return ret;
 }
-- 
2.17.1