3.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: "sreekanth.re...@lsi.com" <sreekanth.re...@lsi.com>
commit 10cce6d8b5af0b32bc4254ae4a28423a74c0921c upstream.
This patch checks whether HBA is SAS2008 B0 controller.
if it is a SAS2008 B0 controller then it use IO-APIC interrupt instead of MSIX,
as SAS2008 B0 controller doesn't support MSIX interrupts.
[jejb: fix whitespace problems]
Signed-off-by: Sreekanth Reddy <sreekanth.re...@lsi.com>
Signed-off-by: James Bottomley <jbottom...@parallels.com>
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
drivers/scsi/mpt2sas/mpt2sas_base.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c
b/drivers/scsi/mpt2sas/mpt2sas_base.c
index b25757d..9d5a56c 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -1209,6 +1209,13 @@ _base_check_enable_msix(struct MPT2SAS_ADAPTER *ioc)
u16 message_control;
+ /* Check whether controller SAS2008 B0 controller,
+ if it is SAS2008 B0 controller use IO-APIC instead of MSIX */
+ if (ioc->pdev->device == MPI2_MFGPAGE_DEVID_SAS2008 &&
+ ioc->pdev->revision == 0x01) {
+ return -EINVAL;
+ }
+
base = pci_find_capability(ioc->pdev, PCI_CAP_ID_MSIX);
if (!base) {
dfailprintk(ioc, printk(MPT2SAS_INFO_FMT "msix not "
--
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