linux-kernel - Re: [PATCH 1/4] Remove path attribute from sgi

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Date:	Tue, 4 Mar 2008 17:19:00 -0700
From:	Alex Chiang <achiang@...com>
To:	Prarit Bhargava <prarit@...hat.com>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Gary Hade <garyhade@...ibm.com>,
	kaneshige.kenji@...fujitsu.com, warthog19@...lescrag.net,
	Matthew Wilcox <matthew@....cx>, gregkh@...e.de,
	kristen.c.accardi@...el.com, rick.jones2@...com,
	linux-kernel@...r.kernel.org, linux-pci@...ey.karlin.mff.cuni.cz,
	linux-acpi@...r.kernel.org
Subject: Re: [PATCH 1/4] Remove path attribute from sgi_hotplug

* Prarit Bhargava <prarit@...hat.com>:
>
>>> -	bss_hotplug_slot->name = kmalloc(SN_SLOT_NAME_SIZE, GFP_KERNEL);
>>> -	if (!bss_hotplug_slot->name) {
>>> -		kfree(bss_hotplug_slot->private);
>>> -		return -ENOMEM;
>>> -	}
>>> +	bss_hotplug_slot->name = slot->physical_path;
>>>
>>>  	slot->device_num = device;
>>>  	slot->pci_bus = pci_bus;
>>> -	sprintf(bss_hotplug_slot->name, "%04x:%02x:%02x",
>>> -		pci_domain_nr(pci_bus),
>>> -		((u16)pcibus_info->pbi_buscommon.bs_persist_busnum),
>>> -		device + 1);
>>>
>>>     
>>   
> Ugh ... it has been a while since I've looked at or owned this code ;) -- 
> but I do seem to recall that on SGI boxes the slot's name was different 
> from the physical path of the device (ie, what was stamped on the back of 
> the PCI hotplug chassis was different from Linux' PCI name) -- OTOH, I 
> haven't recently looked at what slot->physical_path has been initialized 
> to, so they might now be one-and-the-same ....

Nope, you are right -- slot->name is quite different from
slot->physical_path.

I'm going to remove this patch from my series since it will
definitely break SGI.

Jesse, Prarit, thanks for the good catch.

/ac

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