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

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Message-ID: <4898630C.7090403@ru.mvista.com>
Date:	Tue, 05 Aug 2008 18:26:20 +0400
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	petkovbb@...il.com
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, bzolnier@...il.com,
	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:

> 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

> Signed-off-by: Borislav Petkov <petkovbb@...il.com>

> diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c
> index 8fe8b5b..e9b7b69 100644
> --- a/drivers/ide/ide-generic.c
> +++ b/drivers/ide/ide-generic.c
[...]
> @@ -100,19 +100,71 @@ static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
>  static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
>  #endif
>  
> +

    Extra newline...

> +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;
> +		}
> +
> +		/* Cyrix CS5510 pre SFF MWDMA ATA on the bridge */
> +		if (p->vendor == 0x1078 && p->device == 0x0000)
> +			*primary = *secondary = 1;
> +
> +		/* Cyrix CS5520 pre SFF MWDMA ATA on the bridge */
> +		if (p->vendor == 0x1078 && p->device == 0x0002)
> +			*primary = *secondary = 1;

    I think the above two if statements should be collapsed into a single one.

> +
> +		/* Intel MPIIX - PIO ATA on non PCI side of bridge */
> +		if (p->vendor == 0x8086 && p->device == 0x1234) {

    Also, perhaps it makes sense to #include <linux/pci_ids.h> and use the 
macros defined there...

MBR, Sergei
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