linux-kernel - Re: [PATCH 1/1] ACPI: pci_irq, add PRT

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Message-ID: <4C27E965.80508@gmail.com>
Date:	Sun, 27 Jun 2010 18:14:29 -0600
From:	Robert Hancock <hancockrwd@...il.com>
To:	Jiri Slaby <jslaby@...e.cz>
CC:	lenb@...nel.org, linux-pci@...r.kernel.org,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	jirislaby@...il.com, Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: Re: [PATCH 1/1] ACPI: pci_irq, add PRT_ quirk for IBM Bartolo

On 06/27/2010 03:21 PM, Jiri Slaby wrote:
> On IBM Bartolo machines, cards in 00:09.0 are defunct (if use
> interrupts). DSDT says that this slot (with function 0, i.e. pin A) is
> routed to \_SB_.PCI0.PIB_.LNKB. But it's not, it's wired to LNKC, so
> interrupts are misrouted. Add a quirk for this to workaround the
> issue.

That seems a rather serious DSDT flaw. Do devices in that slot work in 
Windows?

>
> This error was reported in suse bugzilla at:
> https://bugzilla.novell.com/show_bug.cgi?id=595683

Apparently that bugzilla requires a login to even view the bug, seems 
bizarre to me..

>
> Signed-off-by: Jiri Slaby<jslaby@...e.cz>
> Cc: Len Brown<lenb@...nel.org>
> Cc: Jesse Barnes<jbarnes@...tuousgeek.org>
> ---
>   drivers/acpi/pci_irq.c |   15 +++++++++++++++
>   1 files changed, 15 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
> index e4804fb..8e054a4 100644
> --- a/drivers/acpi/pci_irq.c
> +++ b/drivers/acpi/pci_irq.c
> @@ -125,6 +125,18 @@ static const struct dmi_system_id hp_t5710[] = {
>   	{ }
>   };
>
> +/* https://bugzilla.novell.com/show_bug.cgi?id=595683 */
> +static const struct dmi_system_id ibm_bartolo[] = {
> +	{
> +		.ident = "IBM Bartolo",
> +		.matches = {
> +			DMI_MATCH(DMI_SYS_VENDOR, "IBM CORPORATION"),
> +			DMI_MATCH(DMI_PRODUCT_NAME, "4810320"),
> +		},
> +	},
> +	{ }
> +};
> +
>   struct prt_quirk {
>   	const struct dmi_system_id *system;
>   	unsigned int		segment;
> @@ -152,6 +164,9 @@ static const struct prt_quirk prt_quirks[] = {
>   	{ hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'),
>   		"\\_SB_.PCI0.LNK1",
>   		"\\_SB_.PCI0.LNK3"},
> +	{ ibm_bartolo, 0, 0, 9, PCI_INTX_PIN('A'),
> +		"\\_SB_.PCI0.PIB_.LNKB",
> +		"\\_SB_.PCI0.PIB_.LNKC"},
>   };
>
>   static void do_prt_fixups(struct acpi_prt_entry *entry,

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