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Date: Sun, 25 Feb 2007 11:43:48 +0900
From: Komuro <komurojun-mbn@nifty.com>
To: Jeff Garzik <jeff@garzik.org>
Cc: Alan <alan@lxorguk.ukuu.org.uk>, linux-kernel@vger.kernel.org,
       IDE/ATA development list <linux-ide@vger.kernel.org>,
       Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [BUG]  PATA_PCMCIA does not work
Message-Id: <20070225114348.26b32671.komurojun-mbn@nifty.com>
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On Sat, 24 Feb 2007 20:45:18 -0500
Jeff Garzik <jeff@garzik.org> wrote:

> Any chance you could insert some printk() calls into ata_apci_exec_tfs? 
>   ata_exec_internal_sg() never calls that function, so I'm curious if 
> something corrupted memory a bit, or what happened.

I insert some printk().
I think the problem is happening on do_drive_get_GTF.


>pcmcia: registering new device pcmcia0.0
>SCSI subsystem initialized
>libata version 2.10 loaded.
>ata1: PATA max PIO0 cmd 0x00010100 ctl 0x0001010e bmdma 0x00000000 irq 4
>scsi0 : pata_pcmcia
>ata_acpi_exec_tfs 0  
>ata_acpi_exec_tfs 1  
>BUG: unable to handle kernel NULL pointer dereference at virtual address 0000004d
> printing eip:
>
>
>int ata_acpi_exec_tfs(struct ata_port *ap)
>{
>	int		ix;
>	int		ret =0;
>	unsigned int	gtf_length;
>	unsigned long	gtf_address;
>	unsigned long	obj_loc;
>
>	if (noacpi)
>		return 0;
>
>	for (ix = 0; ix < ATA_MAX_DEVICES; ix++) {
>		printk("ata_acpi_exec_tfs 0  \n");
>		if (!ata_dev_enabled(&ap->device[ix]))
>			continue;
>
>		printk("ata_acpi_exec_tfs 1  \n");
>		ret = do_drive_get_GTF(ap, ix,
>				&gtf_length, &gtf_address, &obj_loc);
>		printk("ata_acpi_exec_tfs 2  \n");
>		if (ret < 0) {

Best Regards
Komuro
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