scsi: pm80xx: Reset PI and CI memory during re-initialization

Producer index(PI) outbound queue and consumer index(CI) for Outbound queue
are in DMA memory. During resume(), the stale PI and CI Values will lead to
unexpected behavior. These values should be reset to 0 during driver
reinitialization.

Link: https://lore.kernel.org/r/20210415103352.3580-8-Viswas.G@microchip.comAcked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Ashokkumar N <Ashokkumar.N@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/pm8001/pm8001_hwi.c

@@ -240,6 +240,7 @@ static void init_default_table_values(struct pm8001_hba_info *pm8001_ha)
 			pm8001_ha->memoryMap.region[ci_offset + i].phys_addr_lo;
 		pm8001_ha->inbnd_q_tbl[i].ci_virt		=
 			pm8001_ha->memoryMap.region[ci_offset + i].virt_ptr;
+		pm8001_write_32(pm8001_ha->inbnd_q_tbl[i].ci_virt, 0, 0);
 		offsetib = i * 0x20;
 		pm8001_ha->inbnd_q_tbl[i].pi_pci_bar		=
 			get_pci_bar_index(pm8001_mr32(addressib,
@@ -268,6 +269,7 @@ static void init_default_table_values(struct pm8001_hba_info *pm8001_ha)
 			0 | (10 << 16) | (i << 24);
 		pm8001_ha->outbnd_q_tbl[i].pi_virt		=
 			pm8001_ha->memoryMap.region[pi_offset + i].virt_ptr;
+		pm8001_write_32(pm8001_ha->outbnd_q_tbl[i].pi_virt, 0, 0);
 		offsetob = i * 0x24;
 		pm8001_ha->outbnd_q_tbl[i].ci_pci_bar		=
 			get_pci_bar_index(pm8001_mr32(addressob,

drivers/scsi/pm8001/pm80xx_hwi.c

@@ -787,6 +787,7 @@ static void init_default_table_values(struct pm8001_hba_info *pm8001_ha)
 			pm8001_ha->memoryMap.region[ci_offset + i].phys_addr_lo;
 		pm8001_ha->inbnd_q_tbl[i].ci_virt		=
 			pm8001_ha->memoryMap.region[ci_offset + i].virt_ptr;
+		pm8001_write_32(pm8001_ha->inbnd_q_tbl[i].ci_virt, 0, 0);
 		offsetib = i * 0x20;
 		pm8001_ha->inbnd_q_tbl[i].pi_pci_bar		=
 			get_pci_bar_index(pm8001_mr32(addressib,
@@ -820,6 +821,7 @@ static void init_default_table_values(struct pm8001_hba_info *pm8001_ha)
 		pm8001_ha->outbnd_q_tbl[i].interrup_vec_cnt_delay = (i << 24);
 		pm8001_ha->outbnd_q_tbl[i].pi_virt		=
 			pm8001_ha->memoryMap.region[pi_offset + i].virt_ptr;
+		pm8001_write_32(pm8001_ha->outbnd_q_tbl[i].pi_virt, 0, 0);
 		offsetob = i * 0x24;
 		pm8001_ha->outbnd_q_tbl[i].ci_pci_bar		=
 			get_pci_bar_index(pm8001_mr32(addressob,