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[SCSI] fusion: default MSI to disabled for SPI and FC controllers 

There's a fault on the FC controllers that makes them not respond
correctly to MSI.  The SPI controllers are fine, but are likely to be
onboard on older motherboards which don't handle MSI correctly, so
default both these cases to disabled.  Enable by setting the module
parameter mpt_msi_enable=1.

For the SAS case, enable MSI by default, but it can be disabled by
setting the module parameter mpt_msi_enable=0.

Cc: "Prakash, Sathya" <sathya.prakash@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
James Bottomley 2008-07-10 22:10:55 -05:00
parent 0ce3a7e5bd
commit 2789898817
1 changed files with 8 additions and 3 deletions
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11
drivers/message/fusion/mptbase.c
View File

@ -1686,9 +1686,14 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id)
ioc->bus_type = SAS;
}
if (ioc->bus_type == SAS && mpt_msi_enable == -1)
ioc->msi_enable = 1;
else
if (mpt_msi_enable == -1) {
/* Enable on SAS, disable on FC and SPI */
if (ioc->bus_type == SAS)
ioc->msi_enable = 1;
else
ioc->msi_enable = 0;
} else
/* follow flag: 0 - disable; 1 - enable */
ioc->msi_enable = mpt_msi_enable;
if (ioc->errata_flag_1064)