diff options
| -rw-r--r-- | drivers/usb/storage/usb.c | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c index 9d66ce62542e..d468d02179f4 100644 --- a/drivers/usb/storage/usb.c +++ b/drivers/usb/storage/usb.c @@ -884,7 +884,9 @@ static void usb_stor_scan_dwork(struct work_struct *work) dev_dbg(dev, "starting scan\n"); /* For bulk-only devices, determine the max LUN value */ - if (us->protocol == USB_PR_BULK && !(us->fflags & US_FL_SINGLE_LUN)) { + if (us->protocol == USB_PR_BULK && + !(us->fflags & US_FL_SINGLE_LUN) && + !(us->fflags & US_FL_SCM_MULT_TARG)) { mutex_lock(&us->dev_mutex); us->max_lun = usb_stor_Bulk_max_lun(us); mutex_unlock(&us->dev_mutex); @@ -983,21 +985,31 @@ int usb_stor_probe2(struct us_data *us) usb_stor_dbg(us, "Transport: %s\n", us->transport_name); usb_stor_dbg(us, "Protocol: %s\n", us->protocol_name); + if (us->fflags & US_FL_SCM_MULT_TARG) { + /* + * SCM eUSCSI bridge devices can have different numbers + * of LUNs on different targets; allow all to be probed. + */ + us->max_lun = 7; + /* The eUSCSI itself has ID 7, so avoid scanning that */ + us_to_host(us)->this_id = 7; + /* max_id is 8 initially, so no need to set it here */ + } else { + /* In the normal case there is only a single target */ + us_to_host(us)->max_id = 1; + /* + * Like Windows, we won't store the LUN bits in CDB[1] for + * SCSI-2 devices using the Bulk-Only transport (even though + * this violates the SCSI spec). + */ + if (us->transport == usb_stor_Bulk_transport) + us_to_host(us)->no_scsi2_lun_in_cdb = 1; + } + /* fix for single-lun devices */ if (us->fflags & US_FL_SINGLE_LUN) us->max_lun = 0; - if (!(us->fflags & US_FL_SCM_MULT_TARG)) - us_to_host(us)->max_id = 1; - - /* - * Like Windows, we won't store the LUN bits in CDB[1] for SCSI-2 - * devices using the Bulk-Only transport (even though this violates - * the SCSI spec). - */ - if (us->transport == usb_stor_Bulk_transport) - us_to_host(us)->no_scsi2_lun_in_cdb = 1; - /* Find the endpoints and calculate pipe values */ result = get_pipes(us); if (result) |