diff options
Diffstat (limited to 'drivers/scsi/scsi_dh.c')
| -rw-r--r-- | drivers/scsi/scsi_dh.c | 36 |
1 files changed, 27 insertions, 9 deletions
diff --git a/drivers/scsi/scsi_dh.c b/drivers/scsi/scsi_dh.c index 84addee05be6..2b785d09d5bd 100644 --- a/drivers/scsi/scsi_dh.c +++ b/drivers/scsi/scsi_dh.c @@ -126,20 +126,36 @@ static struct scsi_device_handler *scsi_dh_lookup(const char *name) static int scsi_dh_handler_attach(struct scsi_device *sdev, struct scsi_device_handler *scsi_dh) { - int error; + int error, ret = 0; if (!try_module_get(scsi_dh->module)) return -EINVAL; error = scsi_dh->attach(sdev); - if (error) { - sdev_printk(KERN_ERR, sdev, "%s: Attach failed (%d)\n", - scsi_dh->name, error); + if (error != SCSI_DH_OK) { + switch (error) { + case SCSI_DH_NOMEM: + ret = -ENOMEM; + break; + 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; + } + 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; - return error; + return ret; } /* @@ -153,18 +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) |