diff options
| author |   Hannes Reinecke <hare@suse.de> | 2017-09-20 09:18:52 +0200 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2017-09-25 19:03:22 -0400 |
| commit | 2930f817132959254db801fe19e61c477293ad6b (patch) | |
| tree | 57bf1681caed48258094ac628461771be2aa7053 /drivers/scsi/scsi_dh.c | |
| parent | scsi: scsi_dh: Return SCSI_DH_XX error code from ->attach() (diff) | |
| download | linux-dev-2930f817132959254db801fe19e61c477293ad6b.tar.xz linux-dev-2930f817132959254db801fe19e61c477293ad6b.zip | |
scsi: scsi_dh: suppress errors from unsupported devices
Device handlers are optional, and for some handlers like ALUA only
implemented for certain device types. So suppress any errors for
unsupported devices.
Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_dh.c')
| -rw-r--r-- | drivers/scsi/scsi_dh.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/scsi/scsi_dh.c b/drivers/scsi/scsi_dh.c index ac798d284a7e..2b785d09d5bd 100644 --- a/drivers/scsi/scsi_dh.c +++ b/drivers/scsi/scsi_dh.c @@ -140,12 +140,17 @@ static int scsi_dh_handler_attach(struct scsi_device *sdev, case SCSI_DH_RES_TEMP_UNAVAIL: ret = -EAGAIN; break; + case SCSI_DH_DEV_UNSUPP: + case SCSI_DH_NOSYS: + ret = -ENODEV; + break; default: ret = -EINVAL; break; } - sdev_printk(KERN_ERR, sdev, "%s: Attach failed (%d)\n", - scsi_dh->name, error); + if (ret != -ENODEV) + sdev_printk(KERN_ERR, sdev, "%s: Attach failed (%d)\n", + scsi_dh->name, error); module_put(scsi_dh->module); } else sdev->handler = scsi_dh; @@ -164,18 +169,20 @@ static void scsi_dh_handler_detach(struct scsi_device *sdev) module_put(sdev->handler->module); } -int scsi_dh_add_device(struct scsi_device *sdev) +void scsi_dh_add_device(struct scsi_device *sdev) { struct scsi_device_handler *devinfo = NULL; const char *drv; - int err = 0; drv = scsi_dh_find_driver(sdev); if (drv) devinfo = __scsi_dh_lookup(drv); + /* + * device_handler is optional, so ignore errors + * from scsi_dh_handler_attach() + */ if (devinfo) - err = scsi_dh_handler_attach(sdev, devinfo); - return err; + (void)scsi_dh_handler_attach(sdev, devinfo); } void scsi_dh_release_device(struct scsi_device *sdev) |