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authorHannes Reinecke <hare@suse.de>2014-06-25 15:27:36 +0200
committerChristoph Hellwig <hch@lst.de>2014-07-17 22:07:37 +0200
commit9cb78c16f5dadefd8dc5ba0ae5a2f26cd59419b3 (patch)
tree576b86c3ec56dd7176285ec2d27f27ca55f77bc3 /drivers/scsi/ch.c
parent755f516bbb983915d6cbfb5aa592cc0a5a99fd00 (diff)
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scsi: use 64-bit LUNs
The SCSI standard defines 64-bit values for LUNs, and large arrays employing large or hierarchical LUN numbers become more and more common. So update the linux SCSI stack to use 64-bit LUN numbers. Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Christoph Hellwig <hch@infradead.org> Reviewed-by: Ewan Milne <emilne@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/ch.c')
-rw-r--r--drivers/scsi/ch.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index 2a323742ce04..7e952cadbcf1 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -247,7 +247,7 @@ ch_read_element_status(scsi_changer *ch, u_int elem, char *data)
retry:
memset(cmd,0,sizeof(cmd));
cmd[0] = READ_ELEMENT_STATUS;
- cmd[1] = (ch->device->lun << 5) |
+ cmd[1] = ((ch->device->lun & 0x7) << 5) |
(ch->voltags ? 0x10 : 0) |
ch_elem_to_typecode(ch,elem);
cmd[2] = (elem >> 8) & 0xff;
@@ -283,7 +283,7 @@ ch_init_elem(scsi_changer *ch)
VPRINTK(KERN_INFO, "INITIALIZE ELEMENT STATUS, may take some time ...\n");
memset(cmd,0,sizeof(cmd));
cmd[0] = INITIALIZE_ELEMENT_STATUS;
- cmd[1] = ch->device->lun << 5;
+ cmd[1] = (ch->device->lun & 0x7) << 5;
err = ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE);
VPRINTK(KERN_INFO, "... finished\n");
return err;
@@ -303,7 +303,7 @@ ch_readconfig(scsi_changer *ch)
memset(cmd,0,sizeof(cmd));
cmd[0] = MODE_SENSE;
- cmd[1] = ch->device->lun << 5;
+ cmd[1] = (ch->device->lun & 0x7) << 5;
cmd[2] = 0x1d;
cmd[4] = 255;
result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE);
@@ -428,7 +428,7 @@ ch_position(scsi_changer *ch, u_int trans, u_int elem, int rotate)
trans = ch->firsts[CHET_MT];
memset(cmd,0,sizeof(cmd));
cmd[0] = POSITION_TO_ELEMENT;
- cmd[1] = ch->device->lun << 5;
+ cmd[1] = (ch->device->lun & 0x7) << 5;
cmd[2] = (trans >> 8) & 0xff;
cmd[3] = trans & 0xff;
cmd[4] = (elem >> 8) & 0xff;
@@ -447,7 +447,7 @@ ch_move(scsi_changer *ch, u_int trans, u_int src, u_int dest, int rotate)
trans = ch->firsts[CHET_MT];
memset(cmd,0,sizeof(cmd));
cmd[0] = MOVE_MEDIUM;
- cmd[1] = ch->device->lun << 5;
+ cmd[1] = (ch->device->lun & 0x7) << 5;
cmd[2] = (trans >> 8) & 0xff;
cmd[3] = trans & 0xff;
cmd[4] = (src >> 8) & 0xff;
@@ -470,7 +470,7 @@ ch_exchange(scsi_changer *ch, u_int trans, u_int src,
trans = ch->firsts[CHET_MT];
memset(cmd,0,sizeof(cmd));
cmd[0] = EXCHANGE_MEDIUM;
- cmd[1] = ch->device->lun << 5;
+ cmd[1] = (ch->device->lun & 0x7) << 5;
cmd[2] = (trans >> 8) & 0xff;
cmd[3] = trans & 0xff;
cmd[4] = (src >> 8) & 0xff;
@@ -518,7 +518,7 @@ ch_set_voltag(scsi_changer *ch, u_int elem,
elem, tag);
memset(cmd,0,sizeof(cmd));
cmd[0] = SEND_VOLUME_TAG;
- cmd[1] = (ch->device->lun << 5) |
+ cmd[1] = ((ch->device->lun & 0x7) << 5) |
ch_elem_to_typecode(ch,elem);
cmd[2] = (elem >> 8) & 0xff;
cmd[3] = elem & 0xff;
@@ -754,7 +754,7 @@ static long ch_ioctl(struct file *file,
voltag_retry:
memset(ch_cmd, 0, sizeof(ch_cmd));
ch_cmd[0] = READ_ELEMENT_STATUS;
- ch_cmd[1] = (ch->device->lun << 5) |
+ ch_cmd[1] = ((ch->device->lun & 0x7) << 5) |
(ch->voltags ? 0x10 : 0) |
ch_elem_to_typecode(ch,elem);
ch_cmd[2] = (elem >> 8) & 0xff;