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vdpa_sim_blk: allocate the buffer zeroed

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Deleting and recreating a device can lead to having the same
content as the old device, so let's always allocate buffers
completely zeroed out.

Fixes: abebb16254 ("vdpa_sim_blk: support shared backend")
Suggested-by: Qing Wang <qinwang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20231031144339.121453-1-sgarzare@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Stefano Garzarella 2023-10-31 15:43:39 +01:00 committed by Michael S. Tsirkin
parent 3503895788
commit 0d82410252
1 changed files with 2 additions and 2 deletions
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4
drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
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@ -437,7 +437,7 @@ static int vdpasim_blk_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
if (blk->shared_backend) {
blk->buffer = shared_buffer;
} else {
blk->buffer = kvmalloc(VDPASIM_BLK_CAPACITY << SECTOR_SHIFT,
blk->buffer = kvzalloc(VDPASIM_BLK_CAPACITY << SECTOR_SHIFT,
GFP_KERNEL);
if (!blk->buffer) {
ret = -ENOMEM;
@ -495,7 +495,7 @@ static int __init vdpasim_blk_init(void)
goto parent_err;
if (shared_backend) {
shared_buffer = kvmalloc(VDPASIM_BLK_CAPACITY << SECTOR_SHIFT,
shared_buffer = kvzalloc(VDPASIM_BLK_CAPACITY << SECTOR_SHIFT,
GFP_KERNEL);
if (!shared_buffer) {
ret = -ENOMEM;