The _scsih_pci_mmio_enabled called if scsih_pci_error_detected returns PCI_ERS_RESULT_CAN_RECOVER, at this point, read/write to the device still works, no need to reset slot.
Or the mpt3sas_base_map_resources in scsih_pci_slot_reset will fail, and iounamp ioc->chip, then we will meet issue when read ioc->chip in mpt3sas_base_get_iocstate from _base_fault_reset_work. Cc: Sathya Prakash <[email protected]> Cc: Chaitra P B <[email protected]> Cc: Suganath Prabu Subramani <[email protected]> Signed-off-by: Kefeng Wang <[email protected]> --- NOTE: I found this with an earlier kernel version, but the logic is not changed. drivers/scsi/mpt3sas/mpt3sas_scsih.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c index 6bff13e..eedd62e3 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c @@ -9033,8 +9033,11 @@ scsih_pci_mmio_enabled(struct pci_dev *pdev) /* TODO - dump whatever for debugging purposes */ - /* Request a slot reset. */ - return PCI_ERS_RESULT_NEED_RESET; + /* This called only if scsih_pci_error_detected returns + * PCI_ERS_RESULT_CAN_RECOVER, read/write to the device + * still works, not need to reset slot. + */ + return PCI_ERS_RESULT_RECOVERED; } /* -- 1.7.12.4
