On Thu, 29 Jan 2015, Christoph Hellwig wrote:
> Lock the device embedded in the scsi_device to protect against
> concurrent calls to ->remove.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
> drivers/scsi/scsi_scan.c | 7 +++----
> 1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
> index 983aed1..523faee 100644
> --- a/drivers/scsi/scsi_scan.c
> +++ b/drivers/scsi/scsi_scan.c
> @@ -1593,16 +1593,15 @@ EXPORT_SYMBOL(scsi_add_device);
>
> void scsi_rescan_device(struct device *dev)
> {
> - if (!dev->driver)
> - return;
> -
> - if (try_module_get(dev->driver->owner)) {
> + device_lock(dev);
> + if (dev->driver && try_module_get(dev->driver->owner)) {
> struct scsi_driver *drv = to_scsi_driver(dev->driver);
>
> if (drv->rescan)
> drv->rescan(dev);
> module_put(dev->driver->owner);
> }
> + device_unlock(dev);
> }
> EXPORT_SYMBOL(scsi_rescan_device);
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
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