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

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Message-ID: <4DA41440.8060703@suse.cz>
Date:	Tue, 12 Apr 2011 10:58:40 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	Jiri Slaby <jirislaby@...il.com>
CC:	Robert Hancock <hancockrwd@...il.com>, mjg59@...f.ucam.org,
	lenb@...nel.org, linux-pci@...r.kernel.org,
	linux-acpi@...r.kernel.org, jbarnes@...tuousgeek.org,
	linux-kernel@...r.kernel.org, yakui.zhao@...el.com
Subject: Re: [RFC 1/1] ACPI: pci_irq, add PRT_ quirk for IBM Bartolo

On 04/12/2011 10:48 AM, 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.
> 
> References: https://bugzilla.novell.com/show_bug.cgi?id=595683
> References: https://bugzilla.kernel.org/show_bug.cgi?id=18092
> 
> ---
> Hi,
> 
> as Robert Hancock suggested at:
> http://lkml.org/lkml/2010/9/7/206
> 
> I reported this in bugzilla (the link above). But I got only replies
> requesting another infos which I provided.

BTW. the info is (w/ and w/o acpi=noirq):
acpidump: https://bugzilla.kernel.org/attachment.cgi?id=29332
dmesg w/:  https://bugzilla.kernel.org/attachment.cgi?id=29322
dmesg w/o: https://bugzilla.kernel.org/attachment.cgi?id=29312
lspci w/:  https://bugzilla.kernel.org/attachment.cgi?id=29712
lspci w/o: https://bugzilla.kernel.org/attachment.cgi?id=29902
BIOS PRT w/:  https://bugzilla.kernel.org/attachment.cgi?id=43192
BIOS PRT w/o: https://bugzilla.kernel.org/attachment.cgi?id=43182

> Could anybody look into
> the bug and confirm whether this patch is correct or not. And if yes,
> could you apply that?
> 
> ---
> 
> Not-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 f907cfb..e8fb00d 100644
> --- a/drivers/acpi/pci_irq.c
> +++ b/drivers/acpi/pci_irq.c
> @@ -124,6 +124,18 @@ 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;
> @@ -151,6 +163,9 @@ 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,

thanks,
-- 
js
suse labs
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