From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
To: linux-ide@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] ide: ide_unregister() locking bugfix
Date: Sat, 5 Jul 2008 14:51:18 +0200 [thread overview]
Message-ID: <200807051451.18784.bzolnier@gmail.com> (raw)
Holding ide_lock for ide_release_dma_engine() call is unnecessary
and triggers WARN_ON(irqs_disabled()) in dma_free_coherent().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
drivers/ide/ide.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
Index: b/drivers/ide/ide.c
===================================================================
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -352,15 +352,15 @@ void ide_unregister(ide_hwif_t *hwif)
blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
kfree(hwif->sg_table);
unregister_blkdev(hwif->major, hwif->name);
- spin_lock_irq(&ide_lock);
if (hwif->dma_base)
ide_release_dma_engine(hwif);
+ spin_lock_irq(&ide_lock);
/* restore hwif data to pristine status */
ide_init_port_data(hwif, hwif->index);
-
spin_unlock_irq(&ide_lock);
+
mutex_unlock(&ide_cfg_mtx);
}
reply other threads:[~2008-07-05 12:51 UTC|newest]
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