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authorJames Bottomley <James.Bottomley@HansenPartnership.com>2008-07-10 22:10:55 -0500
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-07-12 08:18:11 -0500
commit27898988174bb211fd962ea73b9c6dc09f888705 (patch)
treee07c5156a522f185eae2d17285e26731a2765387
parent0ce3a7e5bd305e96c924fab1e3126480c665f017 (diff)
downloadlinux-27898988174bb211fd962ea73b9c6dc09f888705.tar.bz2
[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>
-rw-r--r--drivers/message/fusion/mptbase.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index db3c892f87fb..d40d6d15ae20 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -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)