diff mbox series

[v3,11/17] virtio_pci: queue_reset: release vq by vp_dev->vqs

Message ID 20220126073533.44994-12-xuanzhuo@linux.alibaba.com (mailing list archive)
State Not Applicable
Headers show
Series virtio pci support VIRTIO_F_RING_RESET | expand

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Context Check Description
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count fail Series longer than 15 patches (and no cover letter)
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 5 maintainers not CCed: andrii@kernel.org kpsingh@kernel.org kafai@fb.com songliubraving@fb.com yhs@fb.com
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch warning CHECK: Blank lines aren't necessary after an open brace '{'
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/tree_selection success Guessing tree name failed - patch did not apply

Commit Message

Xuan Zhuo Jan. 26, 2022, 7:35 a.m. UTC 
In the process of queue reset, vq leaves vdev->vqs, so the original
processing logic may miss some vq. So modify the processing method of
releasing vq. Release vq by listing vqs.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
---
 drivers/virtio/virtio_pci_common.c | 22 ++++++++++++++++++----
 drivers/virtio/virtio_pci_common.h |  2 ++
 2 files changed, 20 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c
index fdbde1db5ec5..6b2573ec1ae8 100644
--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -260,12 +260,20 @@  static void vp_del_vq(struct virtqueue *vq)
 void vp_del_vqs(struct virtio_device *vdev)
 {
 	struct virtio_pci_device *vp_dev = to_vp_device(vdev);
-	struct virtqueue *vq, *n;
-	int i;
+	struct virtio_pci_vq_info *info;
+	struct virtqueue *vq;
+	int i, v;
+
+	for (i = 0; i < vp_dev->nvqs; ++i) {
+
+		info = vp_dev->vqs[i];
+		if (!info)
+			continue;
+
+		vq = info->vq;
 
-	list_for_each_entry_safe(vq, n, &vdev->vqs, list) {
 		if (vp_dev->per_vq_vectors) {
-			int v = vp_dev->vqs[vq->index]->msix_vector;
+			v = info->msix_vector;
 
 			if (v != VIRTIO_MSI_NO_VECTOR) {
 				int irq = pci_irq_vector(vp_dev->pci_dev, v);
@@ -275,6 +283,7 @@  void vp_del_vqs(struct virtio_device *vdev)
 			}
 		}
 		vp_del_vq(vq);
+		vp_dev->vqs[i] = NULL;
 	}
 	vp_dev->per_vq_vectors = false;
 
@@ -308,6 +317,7 @@  void vp_del_vqs(struct virtio_device *vdev)
 	vp_dev->msix_affinity_masks = NULL;
 	kfree(vp_dev->vqs);
 	vp_dev->vqs = NULL;
+	vp_dev->nvqs = 0;
 }
 
 static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs,
@@ -324,6 +334,8 @@  static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs,
 	if (!vp_dev->vqs)
 		return -ENOMEM;
 
+	vp_dev->nvqs = nvqs;
+
 	if (per_vq_vectors) {
 		/* Best option: one for change interrupt, one per vq. */
 		nvectors = 1;
@@ -395,6 +407,8 @@  static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned nvqs,
 	if (!vp_dev->vqs)
 		return -ENOMEM;
 
+	vp_dev->nvqs = nvqs;
+
 	err = request_irq(vp_dev->pci_dev->irq, vp_interrupt, IRQF_SHARED,
 			dev_name(&vdev->dev), vp_dev);
 	if (err)
diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h
index 23f6c5c678d5..392d990b7c73 100644
--- a/drivers/virtio/virtio_pci_common.h
+++ b/drivers/virtio/virtio_pci_common.h
@@ -60,6 +60,8 @@  struct virtio_pci_device {
 	/* array of all queues for house-keeping */
 	struct virtio_pci_vq_info **vqs;
 
+	u32 nvqs;
+
 	/* MSI-X support */
 	int msix_enabled;
 	int intx_enabled;