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| author | Bodo Stroesser <bstroesser@ts.fujitsu.com> | 2019-10-14 20:29:04 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-10 11:25:15 +0100 |
| commit | 5c992eb99d57827f474a713385602c01d509ae08 (patch) | |
| tree | a69232f5bdbd3c579f04f73ea65be77f62eb3027 | |
| parent | f2ffdcec15f34b9ce0856f42ee6a7ea09767a5bc (diff) | |
| download | linux-stable-5c992eb99d57827f474a713385602c01d509ae08.tar.gz linux-stable-5c992eb99d57827f474a713385602c01d509ae08.tar.bz2 linux-stable-5c992eb99d57827f474a713385602c01d509ae08.zip | |
scsi: target: core: Do not overwrite CDB byte 1
[ Upstream commit 27e84243cb63601a10e366afe3e2d05bb03c1cb5 ]
passthrough_parse_cdb() - used by TCMU and PSCSI - attepts to reset the LUN
field of SCSI-2 CDBs (bits 5,6,7 of byte 1). The current code is wrong as
for newer commands not having the LUN field it overwrites relevant command
bits (e.g. for SECURITY PROTOCOL IN / OUT). We think this code was
unnecessary from the beginning or at least it is no longer useful. So we
remove it entirely.
Link: https://lore.kernel.org/r/12498eab-76fd-eaad-1316-c2827badb76a@ts.fujitsu.com
Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/target/target_core_device.c | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index 84742125f773..92b52d2314b5 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -1152,27 +1152,6 @@ passthrough_parse_cdb(struct se_cmd *cmd, unsigned int size; /* - * Clear a lun set in the cdb if the initiator talking to use spoke - * and old standards version, as we can't assume the underlying device - * won't choke up on it. - */ - switch (cdb[0]) { - case READ_10: /* SBC - RDProtect */ - case READ_12: /* SBC - RDProtect */ - case READ_16: /* SBC - RDProtect */ - case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ - case VERIFY: /* SBC - VRProtect */ - case VERIFY_16: /* SBC - VRProtect */ - case WRITE_VERIFY: /* SBC - VRProtect */ - case WRITE_VERIFY_12: /* SBC - VRProtect */ - case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ - break; - default: - cdb[1] &= 0x1f; /* clear logical unit number */ - break; - } - - /* * For REPORT LUNS we always need to emulate the response, for everything * else, pass it up. */ |