linux-kernel - Re: [KERNEL 2.6.26-rc4] bugreport : pata

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Date:	Sun, 6 Jul 2008 10:37:52 +0900
From:	Komuro <komurojun-mbn@...ty.com>
To:	Tejun Heo <htejun@...il.com>
Cc:	Jeff Garzik <jeff@...zik.org>,
	linux-pcmcia <linux-pcmcia@...ts.infradead.org>,
	linux-kernel@...r.kernel.org,
	Dominik Brodowski <linux@...inikbrodowski.net>,
	linux-ide@...r.kernel.org,
	Kristoffer Ericson <kristoffer.ericson@...il.com>,
	jgarzik@...hat.com, rjw@...k.pl
Subject: Re: [KERNEL 2.6.26-rc4]  bugreport : pata_pcmcia with Sandisk
 Extreme III 8GB


Hi, Tejun

The patch below fixes the pata_pcmcia problem.

I think the ap->lock points to bogus address.

Any comment?

--- linux-2.6.26-rc8/drivers/ata/libata-core.c.orig	2008-07-06 10:05:46.000000000 +0900
+++ linux-2.6.26-rc8/drivers/ata/libata-core.c	2008-07-06 10:09:16.000000000 +0900
@@ -5304,6 +5304,8 @@ struct ata_host *ata_host_alloc(struct d
 			goto err_out;
 
 		ap->port_no = i;
+		ap->lock = &ap->__lock;
+		spin_lock_init(ap->lock);
 		host->ports[i] = ap;
 	}
 
--- linux-2.6.26-rc8/include/linux/libata.h.orig	2008-07-06 10:03:54.000000000 +0900
+++ linux-2.6.26-rc8/include/linux/libata.h	2008-07-06 10:04:35.000000000 +0900
@@ -639,6 +639,7 @@ struct ata_port {
 	struct Scsi_Host	*scsi_host; /* our co-allocated scsi host */
 	struct ata_port_operations *ops;
 	spinlock_t		*lock;
+	spinlock_t		__lock;
 	unsigned long		flags;	/* ATA_FLAG_xxx */
 	unsigned int		pflags; /* ATA_PFLAG_xxx */
 	unsigned int		print_id; /* user visible unique port ID */

Best Regards
Komuro

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