linux-kernel - Re: [PATCH 1/2] pata_legacy: export functionality to ide

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Message-ID: <48998C58.20703@ru.mvista.com>
Date:	Wed, 06 Aug 2008 15:34:48 +0400
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	petkovbb@...il.com, Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	Sergei Shtylyov <sshtylyov@...mvista.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: [PATCH 1/2] pata_legacy: export functionality to ide

Hello.

Borislav Petkov wrote:
> From: Borislav Petkov <petkovbb@...il.com>
> Date: Sun, 3 Aug 2008 18:46:35 +0200
> Subject: [PATCH] ide-generic: handle probing of legacy io-ports v4
>
> Avoid probing the io-ports in case an IDE PCI controller is present and it uses
> the legacy iobases. If we still want to enforce the probing, we do
>
> ide_generic.probe_mask=0x3f
>
> on the kernel command line. The iobase checking code is adapted from
> drivers/ata/pata_legacy.c after converting hex pci ids into their corresponding
> macros in <linux/pci_ids.h>.
>
> CC: Sergei Shtylyov <sshtylyov@...mvista.com>
> Signed-off-by: Borislav Petkov <petkovbb@...il.com>
>   

Acked-by: Sergei Shtylyov <sshtylyov@...mvista.com>

> diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c
> index 8fe8b5b..efce159 100644
> --- a/drivers/ide/ide-generic.c
> +++ b/drivers/ide/ide-generic.c
>   
[...]
> @@ -100,19 +101,69 @@ static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
>  static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
>  #endif
>  
> +static void ide_generic_check_pci_legacy_iobases(int *primary, int *secondary)
> +{
> +	struct pci_dev *p = NULL;
> +	u16 val;
> +
> +	for_each_pci_dev(p) {
> +		int r;
> +
> +		for (r = 0; r < 6; r++) {
> +			if (pci_resource_start(p, r) == 0x1f0)
> +				*primary = 1;
> +			if (pci_resource_start(p, r) == 0x170)
> +				*secondary = 1;
> +		}
>   

   Would have been probably enough to test only BAR0/2, don't you think?

MBR, Sergei


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