From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Subject: [PATCH] ide: fix locking in drive_release_dev()
* Request queue cleanup should happen before freeing drive->id
and marking device as non-present. Fix it.
* Remove superfluous hwif->lock acquiring/releasing.
Cc: Stanislaw Gruszka <stf_xl@xxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
I noticed this while investigating the host driver removal
issue -- lets also fix/test this one while we are at it...
drivers/ide/ide-probe.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)
Index: b/drivers/ide/ide-probe.c
===================================================================
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -937,20 +937,16 @@ EXPORT_SYMBOL_GPL(ide_init_disk);
static void drive_release_dev (struct device *dev)
{
ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
- ide_hwif_t *hwif = drive->hwif;
ide_proc_unregister_device(drive);
- spin_lock_irq(&hwif->lock);
+ blk_cleanup_queue(drive->queue);
+ drive->queue = NULL;
+
kfree(drive->id);
drive->id = NULL;
+
drive->dev_flags &= ~IDE_DFLAG_PRESENT;
- /* Messed up locking ... */
- spin_unlock_irq(&hwif->lock);
- blk_cleanup_queue(drive->queue);
- spin_lock_irq(&hwif->lock);
- drive->queue = NULL;
- spin_unlock_irq(&hwif->lock);
complete(&drive->gendev_rel_comp);
}
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