pm8001: Update nvmd response data to request buffer

Instead of using the virt_ptr use request buffer for copying
back the nvmd response data and use the same in request function also

Signed-off-by: Suresh Thiagarajan <suresh.thiagarajan@pmcs.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/scsi/pm8001/pm8001_ctl.c

@@ -385,7 +385,6 @@ static ssize_t pm8001_ctl_bios_version_show(struct device *cdev,
 	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 	char *str = buf;
-	void *virt_addr;
 	int bios_index;
 	DECLARE_COMPLETION_ONSTACK(completion);
 	struct pm8001_ioctl_payload payload;
@@ -402,11 +401,10 @@ static ssize_t pm8001_ctl_bios_version_show(struct device *cdev,
 		return -ENOMEM;
 	}
 	wait_for_completion(&completion);
-	virt_addr = pm8001_ha->memoryMap.region[NVMD].virt_ptr;
 	for (bios_index = BIOSOFFSET; bios_index < BIOS_OFFSET_LIMIT;
 		bios_index++)
 		str += sprintf(str, "%c",
-			*((u8 *)((u8 *)virt_addr+bios_index)));
+			*(payload.func_specific+bios_index));
 	kfree(payload.func_specific);
 	return str - buf;
 }

drivers/scsi/pm8001/pm8001_hwi.c

@@ -3132,6 +3132,7 @@ void pm8001_mpi_set_nvmd_resp(struct pm8001_hba_info *pm8001_ha, void *piomb)
 void
 pm8001_mpi_get_nvmd_resp(struct pm8001_hba_info *pm8001_ha, void *piomb)
 {
+	struct fw_control_ex    *fw_control_context;
 	struct get_nvm_data_resp *pPayload =
 		(struct get_nvm_data_resp *)(piomb + 4);
 	u32 tag = le32_to_cpu(pPayload->tag);
@@ -3140,6 +3141,7 @@ pm8001_mpi_get_nvmd_resp(struct pm8001_hba_info *pm8001_ha, void *piomb)
 	u32 ir_tds_bn_dps_das_nvm =
 		le32_to_cpu(pPayload->ir_tda_bn_dps_das_nvm);
 	void *virt_addr = pm8001_ha->memoryMap.region[NVMD].virt_ptr;
+	fw_control_context = ccb->fw_control_context;
 
 	PM8001_MSG_DBG(pm8001_ha, pm8001_printk("Get nvm data complete!\n"));
 	if ((dlen_status & NVMD_STAT) != 0) {
@@ -3180,6 +3182,12 @@ pm8001_mpi_get_nvmd_resp(struct pm8001_hba_info *pm8001_ha, void *piomb)
 			pm8001_printk("Get NVMD success, IR=0, dataLen=%d\n",
 			(dlen_status & NVMD_LEN) >> 24));
 	}
+	/* Though fw_control_context is freed below, usrAddr still needs
+	 * to be updated as this holds the response to the request function
+	 */
+	memcpy(fw_control_context->usrAddr,
+		pm8001_ha->memoryMap.region[NVMD].virt_ptr,
+		fw_control_context->len);
 	kfree(ccb->fw_control_context);
 	ccb->task = NULL;
 	ccb->ccb_tag = 0xFFFFFFFF;