[PATCH] I2O: more error checking

i2o_scsi: handle sysfs failure

i2o_device:
 * convert i2o_device_add() to return integer error code
   rather than pointer.  Fortunately -nobody- checks the return code of
   this function, so changing has nil impact.
 * handle errors thrown by device_register()

More work in i2o_device remains.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Cc: Markus Lidel <Markus.Lidel@shadowconnect.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 21 insertions, 10 deletions

diff --git a/drivers/message/i2o/device.c b/drivers/message/i2o/device.c
index ee183053fa23..55757af4e3b2 100644
--- a/drivers/message/i2o/device.c
+++ b/drivers/message/i2o/device.c
@@ -214,18 +214,17 @@ static struct i2o_device *i2o_device_alloc(void)
  *      Allocate a new I2O device and initialize it with the LCT entry. The
  *      device is appended to the device list of the controller.
  *
- *      Returns a pointer to the I2O device on success or negative error code
- *      on failure.
+ *      Returns zero on success, or a -ve errno.
  */
-static struct i2o_device *i2o_device_add(struct i2o_controller *c,
-                                         i2o_lct_entry * entry)
+static int i2o_device_add(struct i2o_controller *c, i2o_lct_entry *entry)
 {
         struct i2o_device *i2o_dev, *tmp;
+        int rc;
 
         i2o_dev = i2o_device_alloc();
         if (IS_ERR(i2o_dev)) {
                 printk(KERN_ERR "i2o: unable to allocate i2o device\n");
-                return i2o_dev;
+                return PTR_ERR(i2o_dev);
         }
 
         i2o_dev->lct_data = *entry;
@@ -236,7 +235,9 @@ static struct i2o_device *i2o_device_add(struct i2o_controller *c,
         i2o_dev->iop = c;
         i2o_dev->device.parent = &c->device;
 
-        device_register(&i2o_dev->device);
+        rc = device_register(&i2o_dev->device);
+        if (rc)
+                goto err;
 
         list_add_tail(&i2o_dev->list, &c->devices);
 
@@ -270,7 +271,11 @@ static struct i2o_device *i2o_device_add(struct i2o_controller *c,
 
         pr_debug("i2o: device %s added\n", i2o_dev->device.bus_id);
 
-        return i2o_dev;
+        return 0;
+
+err:
+        kfree(i2o_dev);
+        return rc;
 }
 
 /**
diff --git a/drivers/message/i2o/i2o_scsi.c b/drivers/message/i2o/i2o_scsi.c
index 6ebf38213f9f..d5f93b12b6f1 100644
--- a/drivers/message/i2o/i2o_scsi.c
+++ b/drivers/message/i2o/i2o_scsi.c
@@ -220,7 +220,7 @@ static int i2o_scsi_probe(struct device *dev)
         u32 id = -1;
         u64 lun = -1;
         int channel = -1;
-        int i;
+        int i, rc;
 
         i2o_shost = i2o_scsi_get_host(c);
         if (!i2o_shost)
@@ -304,14 +304,20 @@ static int i2o_scsi_probe(struct device *dev)
                 return PTR_ERR(scsi_dev);
         }
 
-        sysfs_create_link(&i2o_dev->device.kobj, &scsi_dev->sdev_gendev.kobj,
-                          "scsi");
+        rc = sysfs_create_link(&i2o_dev->device.kobj,
+                               &scsi_dev->sdev_gendev.kobj, "scsi");
+        if (rc)
+                goto err;
 
         osm_info("device added (TID: %03x) channel: %d, id: %d, lun: %ld\n",
                  i2o_dev->lct_data.tid, channel, le32_to_cpu(id),
                  (long unsigned int)le64_to_cpu(lun));
 
         return 0;
+
+err:
+        scsi_remove_device(scsi_dev);
+        return rc;
 };
 
 static const char *i2o_scsi_info(struct Scsi_Host *SChost)