Fix for issue - Unable to boot from the SAS drive connected to HBA
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.
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@xxxxxxx>
Cc: <stable@xxxxxxxxxx>
---
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index 6102ef2..fd2f4ad 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -1207,6 +1207,15 @@ _base_check_enable_msix(struct MPT2SAS_ADAPTER *ioc)
{
int base;
u16 message_control;
+ u8 revision;
+
+ /* Check whether controller SAS2008 B0 controller,
+ if it is a SAS2008 B0 controller use IO-APIC instead of MSIX */
+ pci_read_config_byte(ioc->pdev, PCI_CLASS_REVISION, &revision);
+ if (ioc->pdev->device == MPI2_MFGPAGE_DEVID_SAS2008 &&
+ revision == 0x01) {
+ return -EINVAL;
+ }
base = pci_find_capability(ioc->pdev, PCI_CAP_ID_MSIX);
--
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