linux-kernel - [PATCH] [SCSI] scsi_alloc_sdev() trips WARN_ON in scsi_free

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Message-ID: <20111108123623.1a94db09@kryten>
Date:	Tue, 8 Nov 2011 12:36:23 +1100
From:	Anton Blanchard <anton@...ba.org>
To:	Bart Van Assche <bvanassche@....org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	James Bottomley <James.Bottomley@...senpartnership.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, linux-scsi@...r.kernel.org
Subject: [PATCH] [SCSI] scsi_alloc_sdev() trips WARN_ON in scsi_free_queue()


commit 3308511c93e6 ([SCSI] Make scsi_free_queue() kill pending SCSI
commands) requires us to reset the queuedata pointer before calling
scsi_free_queue.

Signed-off-by: Anton Blanchard <anton@...ba.org>
---

Thanks for the tip Bart, does this look good?

diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 72273a0..ebb1206 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -322,6 +322,7 @@ out_device_destroy:
 	scsi_device_set_state(sdev, SDEV_DEL);
 	transport_destroy_device(&sdev->sdev_gendev);
 	put_device(&sdev->sdev_dev);
+	sdev->request_queue->queuedata = NULL;
 	scsi_free_queue(sdev->request_queue);
 	put_device(&sdev->sdev_gendev);
 out:
--
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