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| author | Oliver Neukum <oneukum@suse.de> | 2015-02-10 09:27:59 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-02-24 17:38:46 +0100 |
| commit | ec371326d47385dd3fc8e6c7e0d9e89118d94dd8 (patch) | |
| tree | fe2c4f70187dae976af85d058732fd71f8c1e06a /drivers | |
| parent | uas: Add US_FL_NO_REPORT_OPCODES for JMicron JMS539 (diff) | |
| download | linux-ec371326d47385dd3fc8e6c7e0d9e89118d94dd8.tar.xz linux-ec371326d47385dd3fc8e6c7e0d9e89118d94dd8.zip | |
usb-storage: support for more than 8 LUNs
This is necessary to make some storage arrays work.
Some storage devices have more than 8 LUNs. In addition
you can hook up a WideSCSI bus to USB. In these cases even
level 2 devices can have more than 8 LUNs. For them
it is necessary to simply believe the class specific
command and report its result back to the SCSI layer.
Off by one Alan noticed is fixed.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/storage/usb.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c index d468d02179f4..5600c33fcadb 100644 --- a/drivers/usb/storage/usb.c +++ b/drivers/usb/storage/usb.c @@ -889,6 +889,12 @@ static void usb_stor_scan_dwork(struct work_struct *work) !(us->fflags & US_FL_SCM_MULT_TARG)) { mutex_lock(&us->dev_mutex); us->max_lun = usb_stor_Bulk_max_lun(us); + /* + * Allow proper scanning of devices that present more than 8 LUNs + * While not affecting other devices that may need the previous behavior + */ + if (us->max_lun >= 8) + us_to_host(us)->max_lun = us->max_lun+1; mutex_unlock(&us->dev_mutex); } scsi_scan_host(us_to_host(us)); |