[RESEND][PATCH] firmware: psci: Fix return value from psci_system_suspend()

[Sudeep Holla]

Currently we return the value from invoke_psci_fn() directly as return
value from psci_system_suspend(). It is wrong to send the PSCI interface
return value directly. psci_to_linux_errno() provide the mapping from
PSCI return value to the one that can be returned to the callers within
the kernel.

Use psci_to_linux_errno() to convert and return the correct value from
psci_system_suspend().

Fixes: faf7ec4a92c0 ("drivers: firmware: psci: add system suspend support")
Acked-by: Mark Rutland <mark.rutland at arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla at arm.com>
---
 drivers/firmware/psci/psci.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Hi {arm-}soc team,

Please pick this up directly. This has slipped through the cracks as I
didn't follow up or cc-ed arm-soc team. Previously posted @[1].

Regards,
Sudeep

[1] https://lore.kernel.org/r/20231113153446.82684-1-sudeep.holla@arm.com

diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
index d9629ff87861..2328ca58bba6 100644
--- a/drivers/firmware/psci/psci.c
+++ b/drivers/firmware/psci/psci.c
@@ -497,10 +497,12 @@ int psci_cpu_suspend_enter(u32 state)

 static int psci_system_suspend(unsigned long unused)
 {
+	int err;
 	phys_addr_t pa_cpu_resume = __pa_symbol(cpu_resume);

-	return invoke_psci_fn(PSCI_FN_NATIVE(1_0, SYSTEM_SUSPEND),
+	err = invoke_psci_fn(PSCI_FN_NATIVE(1_0, SYSTEM_SUSPEND),
 			      pa_cpu_resume, 0, 0);
+	return psci_to_linux_errno(err);
 }

 static int psci_system_suspend_enter(suspend_state_t state)
--
2.43.2