linux-kernel - [PATCH v1] platform/mellanox: mlxbf-tmfifo: fix vring

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Message-ID: <20250613214608.2250130-1-davthompson@nvidia.com>
Date: Fri, 13 Jun 2025 21:46:08 +0000
From: David Thompson <davthompson@...dia.com>
To: <hdegoede@...hat.com>, <ilpo.jarvinen@...ux.intel.com>,
	<vadimp@...dia.com>
CC: <platform-driver-x86@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	David Thompson <davthompson@...dia.com>, kernel test robot <lkp@...el.com>
Subject: [PATCH v1] platform/mellanox: mlxbf-tmfifo: fix vring_desc.len assignment

Fix warnings reported by sparse, related to incorrect type:
drivers/platform/mellanox/mlxbf-tmfifo.c:284:38: warning: incorrect type in assignment (different base types)
drivers/platform/mellanox/mlxbf-tmfifo.c:284:38:    expected restricted __virtio32 [usertype] len
drivers/platform/mellanox/mlxbf-tmfifo.c:284:38:    got unsigned long

Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202404040339.S7CUIgf3-lkp@intel.com/
Fixes: 78034cbece79 ("platform/mellanox: mlxbf-tmfifo: Drop the Rx packet if no more descriptors")
Signed-off-by: David Thompson <davthompson@...dia.com>
---
 drivers/platform/mellanox/mlxbf-tmfifo.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/mellanox/mlxbf-tmfifo.c b/drivers/platform/mellanox/mlxbf-tmfifo.c
index aae99adb29eb..70c58c4c6c84 100644
--- a/drivers/platform/mellanox/mlxbf-tmfifo.c
+++ b/drivers/platform/mellanox/mlxbf-tmfifo.c
@@ -281,7 +281,8 @@ static int mlxbf_tmfifo_alloc_vrings(struct mlxbf_tmfifo *fifo,
 		vring->align = SMP_CACHE_BYTES;
 		vring->index = i;
 		vring->vdev_id = tm_vdev->vdev.id.device;
-		vring->drop_desc.len = VRING_DROP_DESC_MAX_LEN;
+		vring->drop_desc.len = cpu_to_virtio32(&tm_vdev->vdev,
+						       VRING_DROP_DESC_MAX_LEN);
 		dev = &tm_vdev->vdev.dev;
 
 		size = vring_size(vring->num, vring->align);
-- 
2.43.2