Patch to clear driver specific data from struct device associated with
a tape drive when released by st unload or because there was a problem
attaching to the device. Currently set in st_probe but never cleared.
Signed-off-by: Shane Seymour <shane.seymour@xxxxxx>
Tested-by: Shane Seymour <shane.seymour@xxxxxx>
---
diff -uprN linux-3.9-vanilla/drivers/scsi/st.c linux-3.9/drivers/scsi/st.c
--- linux-3.9-vanilla/drivers/scsi/st.c 2013-04-29 01:36:01.000000000 +0100
+++ linux-3.9/drivers/scsi/st.c 2013-04-30 02:39:51.000000000 +0100
@@ -4212,6 +4212,7 @@ static int st_probe(struct device *dev)
out_remove_devs:
remove_cdevs(tpnt);
+ dev_set_drvdata(dev, NULL);
spin_lock(&st_index_lock);
idr_remove(&st_index_idr, tpnt->index);
spin_unlock(&st_index_lock);
@@ -4258,6 +4259,7 @@ static void scsi_tape_release(struct kre
struct scsi_tape *tpnt = to_scsi_tape(kref);
struct gendisk *disk = tpnt->disk;
+ dev_set_drvdata(&tpnt->device->sdev_gendev, NULL);
tpnt->device = NULL;
if (tpnt->buffer) {
--
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