[6/8,SCSI] osduld: use ida_simple_get to handle id.

Submitted by Jonathan Cameron on July 22, 2011, 4:41 p.m.

Details

Message ID 1311352886-4047-16-git-send-email-jic23@cam.ac.uk
State Not Applicable
Headers show

Commit Message

Jonathan Cameron July 22, 2011, 4:41 p.m.
This does involve additional use of the spin lock in idr.c.
Is this an issue?

Also, some error mangling was needed to keep the interface
the same.  Does this matter or can we return -ENOSPC instead
of -EBUSY?

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
---
 drivers/scsi/osd/osd_uld.c |   22 ++++++++--------------
 1 files changed, 8 insertions(+), 14 deletions(-)

Patch hide | download patch | download mbox

diff --git a/drivers/scsi/osd/osd_uld.c b/drivers/scsi/osd/osd_uld.c
index b31a8e3..fa849bd 100644
--- a/drivers/scsi/osd/osd_uld.c
+++ b/drivers/scsi/osd/osd_uld.c
@@ -387,7 +387,7 @@  static void __remove(struct device *dev)
 
 	if (oud->disk)
 		put_disk(oud->disk);
-	ida_remove(&osd_minor_ida, oud->minor);
+	ida_simple_remove(&osd_minor_ida, oud->minor);
 
 	kfree(oud);
 }
@@ -403,18 +403,12 @@  static int osd_probe(struct device *dev)
 	if (scsi_device->type != TYPE_OSD)
 		return -ENODEV;
 
-	do {
-		if (!ida_pre_get(&osd_minor_ida, GFP_KERNEL))
-			return -ENODEV;
-
-		error = ida_get_new(&osd_minor_ida, &minor);
-	} while (error == -EAGAIN);
-
-	if (error)
-		return error;
-	if (minor >= SCSI_OSD_MAX_MINOR) {
-		error = -EBUSY;
-		goto err_retract_minor;
+	minor = ida_simple_get(&osd_minor_ida, 0,
+			       SCSI_OSD_MAX_MINOR, GFP_KERNEL);
+	if (minor < 0) {
+		if (minor == -ENOSPC)
+			return -EBUSY;
+		return minor;
 	}
 
 	error = -ENOMEM;
@@ -491,7 +485,7 @@  err_free_osd:
 	dev_set_drvdata(dev, NULL);
 	kfree(oud);
 err_retract_minor:
-	ida_remove(&osd_minor_ida, minor);
+	ida_simple_remove(&osd_minor_ida, minor);
 	return error;
 }