Commit b4017319 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Staging: hv: storvsc: Support hot-removing of scsi devices 



Support hot-removing of scsi devices.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 12675799

drivers/staging/hv/storvsc_drv.c

+45 −0
Original line number Diff line number Diff line
@@ -328,6 +328,27 @@ static void storvsc_bus_scan(struct work_struct *work) 
	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 @@ static void storvsc_command_completion(struct hv_storvsc_request *request) 
	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 @@ static void storvsc_command_completion(struct hv_storvsc_request *request) 
	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))