scsi: megaraid_sas: fix error handle in megasas_probe_one

megasas_mgmt_info.max_index has increased by 1 before megasas_io_attach,
if megasas_io_attach return error, then goto fail_io_attach,
megasas_mgmt_info.instance has a wrong index here. So first reduce
max_index and then set that instance to NULL.

Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Acked-by: Sumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 316c3df0c3fd80f9689499f0351082703772707f..71c4746341ea379e3881d32cf3078f135d15f999 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -6228,8 +6228,8 @@ static int megasas_probe_one(struct pci_dev *pdev,
 fail_start_aen:
 fail_io_attach:
        megasas_mgmt_info.count--;
-       megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
        megasas_mgmt_info.max_index--;
+       megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
 
        instance->instancet->disable_intr(instance);
        megasas_destroy_irqs(instance);