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scsi: megaraid_sas: Reset adapter if FW is not in READY state after device resume

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After device resume we expect the firmware to be in READY state.
Transition to READY might fail due to unhandled exceptions, such as an
internal error or a hardware failure. Retry initiating chip reset and wait
for the controller to come to ready state.

Link: https://lore.kernel.org/r/1579000882-20246-2-git-send-email-anand.lodnoor@broadcom.com
Signed-off-by: Chandrakanth Patil <chandrakanth.patil@broadcom.com>
Signed-off-by: Anand Lodnoor <anand.lodnoor@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Anand Lodnoor 2020-01-14 16:51:12 +05:30 committed by Martin K. Petersen
parent ba304e5b44
commit 499e7246d6
1 changed files with 29 additions and 2 deletions
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31
drivers/scsi/megaraid/megaraid_sas_base.c
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@ -7593,6 +7593,7 @@ megasas_resume(struct pci_dev *pdev)
struct Scsi_Host *host;
struct megasas_instance *instance;
int irq_flags = PCI_IRQ_LEGACY;
u32 status_reg;
instance = pci_get_drvdata(pdev);
@ -7620,9 +7621,35 @@ megasas_resume(struct pci_dev *pdev)
/*
* 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)) {
dev_info(&instance->pdev->dev,
"Failed to transition controller to ready from %s!\n",
__func__);
if (instance->adapter_type != MFI_SERIES) {
status_reg =
instance->instancet->read_fw_status_reg(instance);
if (!(status_reg & MFI_RESET_ADAPTER) ||
((megasas_adp_reset_wait_for_ready
(instance, true, 0)) == FAILED))
goto fail_ready_state;
} else {
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);
/* waiting for about 30 seconds before retry */
ssleep(30);
if (megasas_transition_to_ready(instance, 0))
goto fail_ready_state;
}
dev_info(&instance->pdev->dev,
"FW restarted successfully from %s!\n",
__func__);
}
if (megasas_set_dma_mask(instance))
goto fail_set_dma_mask;