isp(4) broken in RELENG_9

[Joerg Pulz]

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On Thu, 1 Nov 2012, Matthew Jacob wrote:

> On 11/01/12 07:05, Matthew Jacob wrote:
>> So, it's working in 9.1 but not in 9?
>> 
>> Since any fix to 9.0 would be in 9.1 are we just concerned with 
>> understanding what happened, or is there a specific reason we need to know 
>> what changed so that a specific fix to 9.0 is needed?
>> 
>> I'm sure that there is a bug in isp where it can ask for more than a page's 
>> worth of queue space mapping but can't deal with things if you get more 
>> than 1 segment descriptor back. I need to fix that, but I won't be able to 
>> get to that for a couple of weeks.
>> 
>> It's possible that the FC-TAPE changes triggered this because that threw 
>> more of a load on the control space. I'll try and calculate a change to 
>> MAXISPREQUEST to re-fit within a page some time today.
>> 
>> -matt
>> 
> Try the attached patch and see if it works for you. I'm not really satisfied 
> with it- I need to do a slightly more finessed solution, but it might work 
> for you for the moment.

Hi again,

i tried your patch and for now it is working again.
I've added some debug stuff right before the call to isp_dma_tag_create(), 
just FYI, see below.

If you have any "better" solution, just let me know and i will test it.

Kind regards
Joerg

####
isp0: <Qlogic ISP 2532 PCI FC-AL Adapter> port 0x3000-0x30ff mem 
0xf7140000-0xf7143fff,0xf7200000-0xf72fffff irq 16 at device 0.0 on pci3
isp0: isp_pci_mbxdma(): slim: 0
isp0: isp_pci_mbxdma(): len: 114688
isp0: isp_pci_mbxdma(): ns: 29

isp1: <Qlogic ISP 2532 PCI FC-AL Adapter> port 0x3400-0x34ff mem 
0xf7144000-0xf7147fff,0xf7300000-0xf73fffff irq 17 at device 0.1 on pci3
isp1: isp_pci_mbxdma(): slim: 0
isp1: isp_pci_mbxdma(): len: 114688
isp1: isp_pci_mbxdma(): ns: 29
####

- -- 
The beginning is the most important part of the work.
 				-Plato
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