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From: Herbert Rosmanith <kernel@wildsau.enemy.org>
Message-Id: <200606261454.k5QEsGXW013489@wildsau.enemy.org>
Subject: Re: finding pci_dev from scsi_device
In-Reply-To: <1151332900.3185.49.camel@laptopd505.fenrus.org>
To: Arjan van de Ven <arjan@infradead.org>
Date: Mon, 26 Jun 2006 16:54:16 +0200 (MET DST)
CC: linux-kernel@vger.kernel.org
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>         struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
> 
> as you can see, you can easily go from an ata_probe_ent to a pci
> device... 

just for the sake of completeness:

static int ahci_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) {
struct pci_dev *pdev;

	pdev=to_pci_dev(((struct ata_port *)&scsidev->host->hostdata[0])->host_set->dev);

kind regards,
h.rosmanith