[SCSI] qla2xxx: Return sysfs error codes appropriate to conditions.

Return sysfs error codes that match the conditions encountered.
This prevents sysfs from retrying a request which is conditioned
to fail under the current circumstance.
Signed-off-by: NJoe Carnuccio <joe.carnuccio@qlogic.com>
Signed-off-by: NChad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

drivers/scsi/qla2xxx/qla_attr.c

@@ -107,7 +107,7 @@ qla2x00_sysfs_write_fw_dump(struct file *filp, struct kobject *kobj,
 			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
 		break;
 	}
-	return (count);
+	return -EINVAL;
 }
 
 static struct bin_attribute sysfs_fw_dump_attr = {
@@ -151,7 +151,7 @@ qla2x00_sysfs_write_nvram(struct file *filp, struct kobject *kobj,
 
 	if (!capable(CAP_SYS_ADMIN) || off != 0 || count != ha->nvram_size ||
 	    !ha->isp_ops->write_nvram)
-		return 0;
+		return -EINVAL;
 
 	/* Checksum NVRAM. */
 	if (IS_FWI2_CAPABLE(ha)) {
@@ -194,7 +194,7 @@ qla2x00_sysfs_write_nvram(struct file *filp, struct kobject *kobj,
 	qla2xxx_wake_dpc(vha);
 	qla2x00_wait_for_chip_reset(vha);
 
-	return (count);
+	return count;
 }
 
 static struct bin_attribute sysfs_nvram_attr = {
@@ -268,10 +268,10 @@ qla2x00_sysfs_write_optrom_ctl(struct file *filp, struct kobject *kobj,
 	int val, valid;
 
 	if (off)
-		return 0;
+		return -EINVAL;
 
 	if (unlikely(pci_channel_offline(ha->pdev)))
-		return 0;
+		return -EAGAIN;
 
 	if (sscanf(buf, "%d:%x:%x", &val, &start, &size) < 1)
 		return -EINVAL;
@@ -282,7 +282,7 @@ qla2x00_sysfs_write_optrom_ctl(struct file *filp, struct kobject *kobj,
 	case 0:
 		if (ha->optrom_state != QLA_SREADING &&
 		    ha->optrom_state != QLA_SWRITING)
-			break;
+			return -EINVAL;
 
 		ha->optrom_state = QLA_SWAITING;
 
@@ -295,7 +295,7 @@ qla2x00_sysfs_write_optrom_ctl(struct file *filp, struct kobject *kobj,
 		break;
 	case 1:
 		if (ha->optrom_state != QLA_SWAITING)
-			break;
+			return -EINVAL;
 
 		ha->optrom_region_start = start;
 		ha->optrom_region_size = start + size > ha->optrom_size ?
@@ -309,7 +309,7 @@ qla2x00_sysfs_write_optrom_ctl(struct file *filp, struct kobject *kobj,
 			    "(%x).\n", ha->optrom_region_size);
 
 			ha->optrom_state = QLA_SWAITING;
-			return count;
+			return -ENOMEM;
 		}
 
 		if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS) {
@@ -328,7 +328,7 @@ qla2x00_sysfs_write_optrom_ctl(struct file *filp, struct kobject *kobj,
 		break;
 	case 2:
 		if (ha->optrom_state != QLA_SWAITING)
-			break;
+			return -EINVAL;
 
 		/*
 		 * We need to be more restrictive on which FLASH regions are
@@ -376,7 +376,7 @@ qla2x00_sysfs_write_optrom_ctl(struct file *filp, struct kobject *kobj,
 			    "(%x)\n", ha->optrom_region_size);
 
 			ha->optrom_state = QLA_SWAITING;
-			return count;
+			return -ENOMEM;
 		}
 
 		ql_dbg(ql_dbg_user, vha, 0x7067,
@@ -387,7 +387,7 @@ qla2x00_sysfs_write_optrom_ctl(struct file *filp, struct kobject *kobj,
 		break;
 	case 3:
 		if (ha->optrom_state != QLA_SWRITING)
-			break;
+			return -ENOMEM;
 
 		if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS) {
 			ql_log(ql_log_warn, vha, 0x7068,
@@ -403,7 +403,7 @@ qla2x00_sysfs_write_optrom_ctl(struct file *filp, struct kobject *kobj,
 		    ha->optrom_region_start, ha->optrom_region_size);
 		break;
 	default:
-		count = -EINVAL;
+		return -EINVAL;
 	}
 	return count;
 }
@@ -427,10 +427,10 @@ qla2x00_sysfs_read_vpd(struct file *filp, struct kobject *kobj,
 	struct qla_hw_data *ha = vha->hw;
 
 	if (unlikely(pci_channel_offline(ha->pdev)))
-		return 0;
+		return -EAGAIN;
 
 	if (!capable(CAP_SYS_ADMIN))
-		return 0;
+		return -EINVAL;
 
 	if (IS_NOCACHE_VPD_TYPE(ha))
 		ha->isp_ops->read_optrom(vha, ha->vpd, ha->flt_region_vpd << 2,
@@ -467,17 +467,17 @@ qla2x00_sysfs_write_vpd(struct file *filp, struct kobject *kobj,
 
 	/* Update flash version information for 4Gb & above. */
 	if (!IS_FWI2_CAPABLE(ha))
-		goto done;
+		return -EINVAL;
 
 	tmp_data = vmalloc(256);
 	if (!tmp_data) {
 		ql_log(ql_log_warn, vha, 0x706b,
 		    "Unable to allocate memory for VPD information update.\n");
-		goto done;
+		return -ENOMEM;
 	}
 	ha->isp_ops->get_flash_version(vha, tmp_data);
 	vfree(tmp_data);
-done:
+
 	return count;
 }
 
@@ -534,8 +534,7 @@ qla2x00_sysfs_read_sfp(struct file *filp, struct kobject *kobj,
 			    "Unable to read SFP data (%x/%x/%x).\n", rval,
 			    addr, offset);
 
-			count = 0;
-			break;
+			return -EIO;
 		}
 		memcpy(buf, ha->sfp_data, SFP_BLOCK_SIZE);
 		buf += SFP_BLOCK_SIZE;
@@ -565,7 +564,7 @@ qla2x00_sysfs_write_reset(struct file *filp, struct kobject *kobj,
 	int type;
 
 	if (off != 0)
-		return 0;
+		return -EINVAL;
 
 	type = simple_strtol(buf, NULL, 10);
 	switch (type) {
@@ -586,7 +585,7 @@ qla2x00_sysfs_write_reset(struct file *filp, struct kobject *kobj,
 		break;
 	case 0x2025d:
 		if (!IS_QLA81XX(ha))
-			break;
+			return -EPERM;
 
 		ql_log(ql_log_info, vha, 0x706f,
 		    "Issuing MPI reset.\n");
@@ -605,7 +604,7 @@ qla2x00_sysfs_write_reset(struct file *filp, struct kobject *kobj,
 		if (!IS_QLA82XX(ha) || vha != base_vha) {
 			ql_log(ql_log_info, vha, 0x7071,
 			    "FCoE ctx reset no supported.\n");
-			return count;
+			return -EPERM;
 		}
 
 		ql_log(ql_log_info, vha, 0x7072,
@@ -641,7 +640,7 @@ qla2x00_sysfs_write_edc(struct file *filp, struct kobject *kobj,
 	ha->edc_data_len = 0;
 
 	if (!capable(CAP_SYS_ADMIN) || off != 0 || count < 8)
-		return 0;
+		return -EINVAL;
 
 	if (!ha->edc_data) {
 		ha->edc_data = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
@@ -649,7 +648,7 @@ qla2x00_sysfs_write_edc(struct file *filp, struct kobject *kobj,
 		if (!ha->edc_data) {
 			ql_log(ql_log_warn, vha, 0x7073,
 			    "Unable to allocate memory for EDC write.\n");
-			return 0;
+			return -ENOMEM;
 		}
 	}
 
@@ -670,7 +669,7 @@ qla2x00_sysfs_write_edc(struct file *filp, struct kobject *kobj,
 		ql_log(ql_log_warn, vha, 0x7074,
 		    "Unable to write EDC (%x) %02x:%04x:%02x:%02hhx\n",
 		    rval, dev, adr, opt, len, buf[8]);
-		return -EINVAL;
+		return -EIO;
 	}
 
 	return count;
@@ -699,7 +698,7 @@ qla2x00_sysfs_write_edc_status(struct file *filp, struct kobject *kobj,
 	ha->edc_data_len = 0;
 
 	if (!capable(CAP_SYS_ADMIN) || off != 0 || count < 8)
-		return 0;
+		return -EINVAL;
 
 	if (!ha->edc_data) {
 		ha->edc_data = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
@@ -707,7 +706,7 @@ qla2x00_sysfs_write_edc_status(struct file *filp, struct kobject *kobj,
 		if (!ha->edc_data) {
 			ql_log(ql_log_warn, vha, 0x708c,
 			    "Unable to allocate memory for EDC status.\n");
-			return 0;
+			return -ENOMEM;
 		}
 	}
 
@@ -727,7 +726,7 @@ qla2x00_sysfs_write_edc_status(struct file *filp, struct kobject *kobj,
 		ql_log(ql_log_info, vha, 0x7075,
 		    "Unable to write EDC status (%x) %02x:%04x:%02x.\n",
 		    rval, dev, adr, opt, len);
-		return -EINVAL;
+		return -EIO;
 	}
 
 	ha->edc_data_len = len;
@@ -839,7 +838,7 @@ qla2x00_sysfs_read_dcbx_tlv(struct file *filp, struct kobject *kobj,
 	if (!ha->dcbx_tlv) {
 		ql_log(ql_log_warn, vha, 0x7078,
 		    "Unable to allocate memory for DCBX TLV read-data.\n");
-		return 0;
+		return -ENOMEM;
 	}
 
 do_read:
@@ -851,7 +850,7 @@ qla2x00_sysfs_read_dcbx_tlv(struct file *filp, struct kobject *kobj,
 	if (rval != QLA_SUCCESS) {
 		ql_log(ql_log_warn, vha, 0x7079,
 		    "Unable to read DCBX TLV (%x).\n", rval);
-		count = 0;
+		return -EIO;
 	}
 
 	memcpy(buf, ha->dcbx_tlv, count);