On 7/26/21 8:44 PM, lijinlin3@xxxxxxxxxx wrote:
> From: lijinlin <lijinlin3@xxxxxxxxxx>
>
> After add physical volumes to a volume group through vgextend, kernel
> will rescan partitions, which will read the capacity of the device.
> If the device status is set to offline through sysfs at this time,
> read capacity command will return a result which the host byte is
> DID_NO_CONNECT, the capacity of the device will be set to zero in
> read_capacity_error(). However, the capacity of the device can't be
> reread after reset the device status to running, is still zero.
>
> Fix this issue by rescan device when the device state changes to
> SDEV_RUNNING.
>
> Signed-off-by: lijinlin <lijinlin3@xxxxxxxxxx>
> Signed-off-by: Wu Bo <wubo40@xxxxxxxxxx>
> ---
> drivers/scsi/scsi_sysfs.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
> index 32489d25158f..ae9bfc658203 100644
> --- a/drivers/scsi/scsi_sysfs.c
> +++ b/drivers/scsi/scsi_sysfs.c
> @@ -807,11 +807,14 @@ store_state_field(struct device *dev, struct device_attribute *attr,
> mutex_lock(&sdev->state_mutex);
> ret = scsi_device_set_state(sdev, state);
> /*
> - * If the device state changes to SDEV_RUNNING, we need to run
> - * the queue to avoid I/O hang.
> + * If the device state changes to SDEV_RUNNING, we need to
> + * rescan the device to revalidate it, and run the queue to
> + * avoid I/O hang.
> */
> - if (ret == 0 && state == SDEV_RUNNING)
> + if (ret == 0 && state == SDEV_RUNNING) {
> + scsi_rescan_device(dev);
> blk_mq_run_hw_queues(sdev->request_queue, true);
> + }
> mutex_unlock(&sdev->state_mutex);
>
> return ret == 0 ? count : -EINVAL;
In the future, please mention what has been changed between v1 and v2
under the three dashes ("---"). Anyway:
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
