diff options
Diffstat (limited to 'drivers/scsi/virtio_scsi.c')
| -rw-r--r-- | drivers/scsi/virtio_scsi.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index cff083049d5c..bfec84aacd90 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -30,6 +30,8 @@ #include <linux/seqlock.h> #include <linux/blk-mq-virtio.h> +#include "sd.h" + #define VIRTIO_SCSI_MEMPOOL_SZ 64 #define VIRTIO_SCSI_EVENT_LEN 8 #define VIRTIO_SCSI_VQ_BASE 2 @@ -324,6 +326,36 @@ static void virtscsi_handle_param_change(struct virtio_scsi *vscsi, scsi_device_put(sdev); } +static void virtscsi_rescan_hotunplug(struct virtio_scsi *vscsi) +{ + struct scsi_device *sdev; + struct Scsi_Host *shost = virtio_scsi_host(vscsi->vdev); + unsigned char scsi_cmd[MAX_COMMAND_SIZE]; + int result, inquiry_len, inq_result_len = 256; + char *inq_result = kmalloc(inq_result_len, GFP_KERNEL); + + shost_for_each_device(sdev, shost) { + inquiry_len = sdev->inquiry_len ? sdev->inquiry_len : 36; + + memset(scsi_cmd, 0, sizeof(scsi_cmd)); + scsi_cmd[0] = INQUIRY; + scsi_cmd[4] = (unsigned char) inquiry_len; + + memset(inq_result, 0, inq_result_len); + + result = scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE, + inq_result, inquiry_len, NULL, + SD_TIMEOUT, SD_MAX_RETRIES, NULL); + + if (result == 0 && inq_result[0] >> 5) { + /* PQ indicates the LUN is not attached */ + scsi_remove_device(sdev); + } + } + + kfree(inq_result); +} + static void virtscsi_handle_event(struct work_struct *work) { struct virtio_scsi_event_node *event_node = @@ -335,6 +367,7 @@ static void virtscsi_handle_event(struct work_struct *work) cpu_to_virtio32(vscsi->vdev, VIRTIO_SCSI_T_EVENTS_MISSED)) { event->event &= ~cpu_to_virtio32(vscsi->vdev, VIRTIO_SCSI_T_EVENTS_MISSED); + virtscsi_rescan_hotunplug(vscsi); scsi_scan_host(virtio_scsi_host(vscsi->vdev)); } |