linux-kernel - [PATCH 1/1] pseries/hotplug-memory.c: Replace nested ifs by switch-case

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Date:   Thu,  1 Aug 2019 19:52:51 -0300
From:   Leonardo Bras <leonardo@...ux.ibm.com>
To:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Cc:     Leonardo Bras <leonardo@...ux.ibm.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nathan Fontenot <nfont@...ux.vnet.ibm.com>,
        Pavel Tatashin <pavel.tatashin@...rosoft.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Nathan Lynch <nathanl@...ux.ibm.com>,
        YueHaibing <yuehaibing@...wei.com>,
        Mahesh Salgaonkar <mahesh@...ux.vnet.ibm.com>,
        Rob Herring <robh@...nel.org>
Subject: [PATCH 1/1] pseries/hotplug-memory.c: Replace nested ifs by switch-case

I noticed these nested ifs can be easily replaced by switch-cases,
which can improve readability.

Signed-off-by: Leonardo Bras <leonardo@...ux.ibm.com>
---
 .../platforms/pseries/hotplug-memory.c        | 26 +++++++++++++------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
index 46d0d35b9ca4..8e700390f3d6 100644
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -880,34 +880,44 @@ int dlpar_memory(struct pseries_hp_errorlog *hp_elog)
 
 	switch (hp_elog->action) {
 	case PSERIES_HP_ELOG_ACTION_ADD:
-		if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_COUNT) {
+		switch (hp_elog->id_type) {
+		case PSERIES_HP_ELOG_ID_DRC_COUNT:
 			count = hp_elog->_drc_u.drc_count;
 			rc = dlpar_memory_add_by_count(count);
-		} else if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_INDEX) {
+			break;
+		case PSERIES_HP_ELOG_ID_DRC_INDEX:
 			drc_index = hp_elog->_drc_u.drc_index;
 			rc = dlpar_memory_add_by_index(drc_index);
-		} else if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_IC) {
+			break;
+		case PSERIES_HP_ELOG_ID_DRC_IC:
 			count = hp_elog->_drc_u.ic.count;
 			drc_index = hp_elog->_drc_u.ic.index;
 			rc = dlpar_memory_add_by_ic(count, drc_index);
-		} else {
+			break;
+		default:
 			rc = -EINVAL;
+			break;
 		}
 
 		break;
 	case PSERIES_HP_ELOG_ACTION_REMOVE:
-		if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_COUNT) {
+		switch (hp_elog->id_type) {
+		case PSERIES_HP_ELOG_ID_DRC_COUNT:
 			count = hp_elog->_drc_u.drc_count;
 			rc = dlpar_memory_remove_by_count(count);
-		} else if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_INDEX) {
+			break;
+		case PSERIES_HP_ELOG_ID_DRC_INDEX:
 			drc_index = hp_elog->_drc_u.drc_index;
 			rc = dlpar_memory_remove_by_index(drc_index);
-		} else if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_IC) {
+			break;
+		case PSERIES_HP_ELOG_ID_DRC_IC:
 			count = hp_elog->_drc_u.ic.count;
 			drc_index = hp_elog->_drc_u.ic.index;
 			rc = dlpar_memory_remove_by_ic(count, drc_index);
-		} else {
+			break;
+		default:
 			rc = -EINVAL;
+			break;
 		}
 
 		break;
-- 
2.20.1