[dpdk-dev] [PATCH 4/5] examples: fix check for null before de-reference

[Bruce Richardson <bruce.richardson@intel.com>]

The check for NULL is in the wrong position in the "if" error leg. The
pointer should be checked for NULL before checking what the value of
what the pointer points to is.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 examples/vm_power_manager/channel_manager.c | 2 +-
 examples/vm_power_manager/vm_power_cli.c    | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/examples/vm_power_manager/channel_manager.c b/examples/vm_power_manager/channel_manager.c
index 34a395d..04344ae 100644
--- a/examples/vm_power_manager/channel_manager.c
+++ b/examples/vm_power_manager/channel_manager.c
@@ -389,7 +389,7 @@ add_all_channels(const char *vm_name)
 		errno = 0;
 		channel_num = (unsigned)strtol(remaining, &tail_ptr, 0);
 		if ((errno != 0) || (remaining[0] == '\0') ||
-				(*tail_ptr != '\0') || tail_ptr == NULL) {
+				tail_ptr == NULL || (*tail_ptr != '\0')) {
 			RTE_LOG(WARNING, CHANNEL_MANAGER, "Malformed channel name"
 					"'%s' found it should be in the form of "
 					"'<guest_name>.<channel_num>(decimal)'\n",
diff --git a/examples/vm_power_manager/vm_power_cli.c b/examples/vm_power_manager/vm_power_cli.c
index e7f4469..bd685fd 100644
--- a/examples/vm_power_manager/vm_power_cli.c
+++ b/examples/vm_power_manager/vm_power_cli.c
@@ -323,7 +323,7 @@ cmd_channels_op_parsed(void *parsed_result, struct cmdline *cl,
 			break;
 		errno = 0;
 		channel_num = (unsigned)strtol(token, &tail_ptr, 10);
-		if ((errno != 0) || (*tail_ptr != '\0') || tail_ptr == NULL)
+		if ((errno != 0) || tail_ptr == NULL || (*tail_ptr != '\0'))
 			break;
 
 		if (channel_num == CHANNEL_CMDS_MAX_VM_CHANNELS) {
@@ -408,7 +408,7 @@ cmd_channels_status_op_parsed(void *parsed_result, struct cmdline *cl,
 			break;
 		errno = 0;
 		channel_num = (unsigned)strtol(token, &tail_ptr, 10);
-		if ((errno != 0) || (*tail_ptr != '\0') || tail_ptr == NULL)
+		if ((errno != 0) || tail_ptr == NULL || (*tail_ptr != '\0'))
 			break;
 
 		if (channel_num == CHANNEL_CMDS_MAX_VM_CHANNELS) {
-- 
1.9.3