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[SCSI] megaraid_sas: megaraid_sas driver init fails in kdump kernel

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Problem: When Hardware IOMMU is on, megaraid_sas driver initialization fails
in kdump kernel with LSI MegaRAID controller(device id-0x73).

Actually this issue needs fix in firmware, but for firmware running in field,
this driver fix is proposed to resolve the issue.  At firmware initialization
time, if firmware does not come to ready state, driver will reset the adapter
and retry for firmware transition to ready state unconditionally(not only
executed for kdump kernel).

Signed-off-by: Sumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Sumit.Saxena@lsi.com 2013-07-16 02:26:05 +05:30 committed by James Bottomley
parent 36f571e9ed
commit 6431f5d7c6
1 changed files with 15 additions and 5 deletions
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20
drivers/scsi/megaraid/megaraid_sas_base.c
View file

@ -3547,11 +3547,21 @@ static int megasas_init_fw(struct megasas_instance *instance)
break;
}
/*
* We expect the FW state to be READY
*/
if (megasas_transition_to_ready(instance, 0))
goto fail_ready_state;
if (megasas_transition_to_ready(instance, 0)) {
atomic_set(&instance->fw_reset_no_pci_access, 1);
instance->instancet->adp_reset
(instance, instance->reg_set);
atomic_set(&instance->fw_reset_no_pci_access, 0);
dev_info(&instance->pdev->dev,
"megasas: FW restarted successfully from %s!\n",
__func__);
/*waitting for about 30 second before retry*/
ssleep(30);
if (megasas_transition_to_ready(instance, 0))
goto fail_ready_state;
}
/*
* MSI-X host index 0 is common for all adapter.