[PATCH -next] misc: rtsx: fix build for CONFIG_PM not set

[Randy Dunlap]

When CONFG_WERROR=y and CONFIG_PM is not set, there are fatal build
errors, so surround these functions in an #ifdef CONFIG_PM block.

../drivers/misc/cardreader/rtsx_pcr.c:1057:13: error: ‘rtsx_enable_aspm’ defined but not used [-Werror=unused-function]
 static void rtsx_enable_aspm(struct rtsx_pcr *pcr)
miscread001.out:../drivers/misc/cardreader/rtsx_pcr.c:1065:13: error: ‘rtsx_comm_pm_power_saving’ defined but not used [-Werror=unused-function]
miscread001.out: static void rtsx_comm_pm_power_saving(struct rtsx_pcr *pcr)
../drivers/misc/cardreader/rtsx_pcr.c:1084:13: error: ‘rtsx_pm_power_saving’ defined but not used [-Werror=unused-function]
 static void rtsx_pm_power_saving(struct rtsx_pcr *pcr)

Fixes: 597568e8df04 ("misc: rtsx: Rework runtime power management flow")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Wei WANG <wei_wang@xxxxxxxxxxxxxx>
Cc: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
---
 drivers/misc/cardreader/rtsx_pcr.c |    2 ++
 1 file changed, 2 insertions(+)

--- linux-next-20220225.orig/drivers/misc/cardreader/rtsx_pcr.c
+++ linux-next-20220225/drivers/misc/cardreader/rtsx_pcr.c
@@ -1054,6 +1054,7 @@ static int rtsx_pci_acquire_irq(struct r
 	return 0;
 }
 
+#ifdef CONFIG_PM
 static void rtsx_enable_aspm(struct rtsx_pcr *pcr)
 {
 	if (pcr->ops->set_aspm)
@@ -1085,6 +1086,7 @@ static void rtsx_pm_power_saving(struct
 {
 	rtsx_comm_pm_power_saving(pcr);
 }
+#endif
 
 static void rtsx_base_force_power_down(struct rtsx_pcr *pcr)
 {