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| author | Johannes Thumshirn <jthumshirn@suse.de> | 2018-03-23 16:37:05 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-04-09 23:35:12 +0300 |
| commit | 2ee5671e3ae35e53bb5a53a89ac8f033e4b1721f (patch) | |
| tree | a73d28aef958f9c4ecb75541e52a3aa5ad576cfc | |
| parent | cbee67c2d7f97aaa1a85501d621002b4dc1e24b8 (diff) | |
| download | linux-2ee5671e3ae35e53bb5a53a89ac8f033e4b1721f.tar.xz | |
scsi: scsi_dh: Don't look for NULL devices handlers by name
Currently scsi_dh_lookup() doesn't check for NULL as a device name. This
combined with nvme over dm-mpath results in the following messages
emitted by device-mapper:
device-mapper: multipath: Could not failover device 259:67: Handler scsi_dh_(null) error 14.
Let scsi_dh_lookup() fail fast on NULL names.
[mkp: typo fix]
Cc: <stable@vger.kernel.org> # v4.16
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/scsi_dh.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_dh.c b/drivers/scsi/scsi_dh.c index b88b5dbbc444..188f30572aa1 100644 --- a/drivers/scsi/scsi_dh.c +++ b/drivers/scsi/scsi_dh.c @@ -112,6 +112,9 @@ static struct scsi_device_handler *scsi_dh_lookup(const char *name) { struct scsi_device_handler *dh; + if (!name || strlen(name) == 0) + return NULL; + dh = __scsi_dh_lookup(name); if (!dh) { request_module("scsi_dh_%s", name); |