Changing the state of a SCSI device via sysfs into "cancel" or
"deleted" prevents scsi_remove_host() to remove these devices.
Hence do not allow this.
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: James Bottomley <JBottomley@xxxxxxxxxxxxx>
Cc: Mike Christie <michaelc@xxxxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
---
drivers/scsi/scsi_sysfs.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 4348f12..b319c20 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -591,13 +591,15 @@ sdev_store_delete(struct device *dev, struct device_attribute *attr,
};
static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
+#define INVALID_SDEV_STATE 0
+
static ssize_t
store_state_field(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int i;
struct scsi_device *sdev = to_scsi_device(dev);
- enum scsi_device_state state = 0;
+ enum scsi_device_state state = INVALID_SDEV_STATE;
for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
const int len = strlen(sdev_states[i].name);
@@ -607,7 +609,8 @@ store_state_field(struct device *dev, struct device_attribute *attr,
break;
}
}
- if (!state)
+ if (state == INVALID_SDEV_STATE || state == SDEV_CANCEL ||
+ state == SDEV_DEL)
return -EINVAL;
if (scsi_device_set_state(sdev, state))
--
1.7.10.4
--
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