linux-kernel - [PATCH 2/2] virtio_pci_modern: correct sparse tags for notify

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Date:   Tue, 4 May 2021 04:20:56 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     kernel test robot <lkp@...el.com>,
        Jason Wang <jasowang@...hat.com>, Eli Cohen <elic@...dia.com>,
        virtualization@...ts.linux-foundation.org
Subject: [PATCH 2/2] virtio_pci_modern: correct sparse tags for notify

When switching virtio_pci_modern to use a helper for mappings we lost an
__iomem tag. Restore it.

Reported-by: kernel test robot <lkp@...el.com>
Fixes: 9e3bb9b79a71 ("virtio_pci_modern: introduce helper to map vq notify area")
Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 drivers/virtio/virtio_pci_modern_dev.c | 9 ++++-----
 include/linux/virtio_pci_modern.h      | 4 ++--
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/virtio/virtio_pci_modern_dev.c b/drivers/virtio/virtio_pci_modern_dev.c
index ae87b3fa8858..54f297028586 100644
--- a/drivers/virtio/virtio_pci_modern_dev.c
+++ b/drivers/virtio/virtio_pci_modern_dev.c
@@ -605,8 +605,8 @@ static u16 vp_modern_get_queue_notify_off(struct virtio_pci_modern_device *mdev,
  *
  * Returns the address of the notification area
  */
-void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
-			      u16 index, resource_size_t *pa)
+void __iomem *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
+				      u16 index, resource_size_t *pa)
 {
 	u16 off = vp_modern_get_queue_notify_off(mdev, index);
 
@@ -624,10 +624,9 @@ void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
 		if (pa)
 			*pa = mdev->notify_pa +
 			      off * mdev->notify_offset_multiplier;
-		return (void __force *)mdev->notify_base +
-			off * mdev->notify_offset_multiplier;
+		return mdev->notify_base + off * mdev->notify_offset_multiplier;
 	} else {
-		return (void __force *)vp_modern_map_capability(mdev,
+		return vp_modern_map_capability(mdev,
 				       mdev->notify_map_cap, 2, 2,
 				       off * mdev->notify_offset_multiplier, 2,
 				       NULL, pa);
diff --git a/include/linux/virtio_pci_modern.h b/include/linux/virtio_pci_modern.h
index cdfabbefacdf..6a95b58fd0f4 100644
--- a/include/linux/virtio_pci_modern.h
+++ b/include/linux/virtio_pci_modern.h
@@ -101,8 +101,8 @@ void vp_modern_set_queue_size(struct virtio_pci_modern_device *mdev,
 u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
 			     u16 idx);
 u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev);
-void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
-                              u16 index, resource_size_t *pa);
+void __iomem * vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
+				       u16 index, resource_size_t *pa);
 int vp_modern_probe(struct virtio_pci_modern_device *mdev);
 void vp_modern_remove(struct virtio_pci_modern_device *mdev);
 #endif
-- 
MST