Commit 0d824102 authored by Stefano Garzarella's avatar Stefano Garzarella Committed by Michael S. Tsirkin
Browse files

vdpa_sim_blk: allocate the buffer zeroed 



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: abebb162 ("vdpa_sim_blk: support shared backend")
Suggested-by: default avatarQing Wang <qinwang@redhat.com>
Signed-off-by: default avatarStefano Garzarella <sgarzare@redhat.com>
Message-Id: <20231031144339.121453-1-sgarzare@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Acked-by: default avatarEugenio Pérez <eperezma@redhat.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
parent 35038957

drivers/vdpa/vdpa_sim/vdpa_sim_blk.c

+2 −2
Original line number Diff line number Diff line
@@ -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;