Staging: hv: storvsc: Support hot-removing of scsi devices
Support hot-removing of scsi devices.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/hv/storvsc_drv.c b/drivers/staging/hv/storvsc_drv.c
index 7c82d14..0245143 100644
--- a/drivers/staging/hv/storvsc_drv.c
+++ b/drivers/staging/hv/storvsc_drv.c
@@ -328,6 +328,27 @@
kfree(wrk);
}
+static void storvsc_remove_lun(struct work_struct *work)
+{
+ struct storvsc_scan_work *wrk;
+ struct scsi_device *sdev;
+
+ wrk = container_of(work, struct storvsc_scan_work, work);
+ if (!scsi_host_get(wrk->host))
+ goto done;
+
+ sdev = scsi_device_lookup(wrk->host, 0, 0, wrk->lun);
+
+ if (sdev) {
+ scsi_remove_device(sdev);
+ scsi_device_put(sdev);
+ }
+ scsi_host_put(wrk->host);
+
+done:
+ kfree(wrk);
+}
+
static inline struct storvsc_device *get_out_stor_device(
struct hv_device *device)
{
@@ -1112,6 +1133,7 @@
void (*scsi_done_fn)(struct scsi_cmnd *);
struct scsi_sense_hdr sense_hdr;
struct vmscsi_request *vm_srb;
+ struct storvsc_scan_work *wrk;
vm_srb = &request->vstor_packet.vm_srb;
if (cmd_request->bounce_sgl_count) {
@@ -1134,6 +1156,29 @@
else
scmnd->result = vm_srb->scsi_status;
+ /*
+ * If the LUN is invalid; remove the device.
+ */
+ if (vm_srb->srb_status == 0x20) {
+ struct storvsc_device *stor_dev;
+ struct hv_device *dev = host_dev->dev;
+ struct Scsi_Host *host;
+
+ stor_dev = get_in_stor_device(dev);
+ host = stor_dev->host;
+
+ wrk = kmalloc(sizeof(struct storvsc_scan_work),
+ GFP_ATOMIC);
+ if (!wrk) {
+ scmnd->result = DID_TARGET_FAILURE << 16;
+ } else {
+ wrk->host = host;
+ wrk->lun = vm_srb->lun;
+ INIT_WORK(&wrk->work, storvsc_remove_lun);
+ schedule_work(&wrk->work);
+ }
+ }
+
if (scmnd->result) {
if (scsi_normalize_sense(scmnd->sense_buffer,
SCSI_SENSE_BUFFERSIZE, &sense_hdr))