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pds_vdpa: clear config callback when status goes to 0

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[ Upstream commit dd3b8de16e90c5594eddd29aeeb99e97c6f863be ]

If the client driver is setting status to 0, something is
getting shutdown and possibly removed.  Make sure we clear
the config_cb so that it doesn't end up crashing when
trying to call a bogus callback.

Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Message-Id: <20231110221802.46841-3-shannon.nelson@amd.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Shannon Nelson 2023-11-10 14:18:01 -08:00 • committed by Greg Kroah-Hartman
parent 53fff954e7
commit d3bb92beda
1 changed files with 3 additions and 1 deletions
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4
drivers/vdpa/pds/vdpa_dev.c
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@ -461,8 +461,10 @@ static void pds_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
pds_vdpa_cmd_set_status(pdsv, status);
/* Note: still working with FW on the need for this reset cmd */
if (status == 0) {
struct vdpa_callback null_cb = { };
pds_vdpa_set_config_cb(vdpa_dev, &null_cb);
pds_vdpa_cmd_reset(pdsv);
for (i = 0; i < pdsv->num_vqs; i++) {