diff options
Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
| -rw-r--r-- | drivers/scsi/scsi_sysfs.c | 54 |
1 files changed, 50 insertions, 4 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index 939de0de18bc..67a38a1409ba 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -276,8 +276,22 @@ static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; } +static int scsi_bus_uevent(struct device *dev, char **envp, int num_envp, + char *buffer, int buffer_size) +{ + struct scsi_device *sdev = to_scsi_device(dev); + int i = 0; + int length = 0; + + add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, + "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); + envp[i] = NULL; + return 0; +} + static int scsi_bus_suspend(struct device * dev, pm_message_t state) { + struct device_driver *drv = dev->driver; struct scsi_device *sdev = to_scsi_device(dev); struct scsi_host_template *sht = sdev->host->hostt; int err; @@ -286,28 +300,51 @@ static int scsi_bus_suspend(struct device * dev, pm_message_t state) if (err) return err; - if (sht->suspend) + /* call HLD suspend first */ + if (drv && drv->suspend) { + err = drv->suspend(dev, state); + if (err) + return err; + } + + /* then, call host suspend */ + if (sht->suspend) { err = sht->suspend(sdev, state); + if (err) { + if (drv && drv->resume) + drv->resume(dev); + return err; + } + } - return err; + return 0; } static int scsi_bus_resume(struct device * dev) { + struct device_driver *drv = dev->driver; struct scsi_device *sdev = to_scsi_device(dev); struct scsi_host_template *sht = sdev->host->hostt; - int err = 0; + int err = 0, err2 = 0; + /* call host resume first */ if (sht->resume) err = sht->resume(sdev); + /* then, call HLD resume */ + if (drv && drv->resume) + err2 = drv->resume(dev); + scsi_device_resume(sdev); - return err; + + /* favor LLD failure */ + return err ? err : err2;; } struct bus_type scsi_bus_type = { .name = "scsi", .match = scsi_bus_match, + .uevent = scsi_bus_uevent, .suspend = scsi_bus_suspend, .resume = scsi_bus_resume, }; @@ -547,6 +584,14 @@ show_sdev_iostat(iorequest_cnt); show_sdev_iostat(iodone_cnt); show_sdev_iostat(ioerr_cnt); +static ssize_t +sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct scsi_device *sdev; + sdev = to_scsi_device(dev); + return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); +} +static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); /* Default template for device attributes. May NOT be modified */ static struct device_attribute *scsi_sysfs_sdev_attrs[] = { @@ -566,6 +611,7 @@ static struct device_attribute *scsi_sysfs_sdev_attrs[] = { &dev_attr_iorequest_cnt, &dev_attr_iodone_cnt, &dev_attr_ioerr_cnt, + &dev_attr_modalias, NULL }; |