[PATCH v2] drivers/firmware/psci: Assign @err directly in hotplug_tests()

[Gavin Shan]

The return value of down_and_up_cpus() can be assigned to @err directly.
With that, the useless assignment to @err with zero can be dropped.

Signed-off-by: Gavin Shan <gshan at redhat.com>
Reviewed-by: Sudeep Holla <sudeep.holla at arm.com>
---
v2: Pick r-b from Sudeep and rebase to 5.8.rc3
---
 drivers/firmware/psci/psci_checker.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/firmware/psci/psci_checker.c b/drivers/firmware/psci/psci_checker.c
index d9b1a2d71223..3d6ba425dbb9 100644
--- a/drivers/firmware/psci/psci_checker.c
+++ b/drivers/firmware/psci/psci_checker.c
@@ -199,13 +199,12 @@ static int hotplug_tests(void)
 	if (!page_buf)
 		goto out_free_cpu_groups;
 
-	err = 0;
 	/*
 	 * Of course the last CPU cannot be powered down and cpu_down() should
 	 * refuse doing that.
 	 */
 	pr_info("Trying to turn off and on again all CPUs\n");
-	err += down_and_up_cpus(cpu_online_mask, offlined_cpus);
+	err = down_and_up_cpus(cpu_online_mask, offlined_cpus);
 
 	/*
 	 * Take down CPUs by cpu group this time. When the last CPU is turned
-- 
2.23.0