targetcli-fb (or its library: rtslib-fb) allows us to create LUN up to
65535. On the other hand, the kernel driver is limiting max_lun to 0.
This limitation causes actual problem when you delete a loopback device
(using /sys/class/scsi_device/${lun}/device/delete) and rescan it (using
/sys/class/scsi_host/host${h}/scan). You can delete the device, but
cannot rescan it because its LUN is larger than max_lun and so the scan
request results in -EINVAL error in scsi_scan_host_selected().
This commit fix the upper limit to a max possible value: U64_MAX.
Signed-off-by: Naohiro Aota <naohiro.aota@xxxxxxx>
---
drivers/target/loopback/tcm_loop.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c
index 0942f3bd7eec..50e93b487375 100644
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -336,10 +336,10 @@ static int tcm_loop_driver_probe(struct device *dev)
*/
*((struct tcm_loop_hba **)sh->hostdata) = tl_hba;
/*
- * Setup single ID, Channel and LUN for now..
+ * Setup single ID, and Channel for now..
*/
sh->max_id = 2;
- sh->max_lun = 0;
+ sh->max_lun = U64_MAX;
sh->max_channel = 0;
sh->max_cmd_len = SCSI_MAX_VARLEN_CDB_SIZE;
--
2.23.0
