[PATCH] ARM: imx: Fix suspend/resume crash with Clang CFI

[PATCH] ARM: imx: Fix suspend/resume crash with Clang CFI

[Yo'av Moshe]

Relocated suspend code in OCRAM lacks compiler-generated CFI type
signatures. When CONFIG_CFI=y is active, the indirect call to
imx6_suspend_in_ocram_fn triggers a strict CFI violation panic.

Annotate imx6q_suspend_finish with __nocfi to bypass CFI checking
for this specific indirect call.

Cc: stable@vger.kernel.org
Signed-off-by: Yo'av Moshe <linux@yoavmoshe.com>
---
Tested on a Kobo Clara HD (i.MX6SLL SoC) running postmarketOS edge. 
Before this patch, suspending the device caused an immediate silent 
hang requiring a hard-reboot. With this patch applied, suspend and 
resume work successfully.

 arch/arm/mach-imx/pm-imx6.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-imx/pm-imx6.c b/arch/arm/mach-imx/pm-imx6.c
index a671ca498..d9b0c1803 100644
--- a/arch/arm/mach-imx/pm-imx6.c
+++ b/arch/arm/mach-imx/pm-imx6.c
@@ -360,7 +360,7 @@ int imx6_set_lpm(enum mxc_cpu_pwr_mode mode)
 	return 0;
 }
 
-static int imx6q_suspend_finish(unsigned long val)
+static int __nocfi imx6q_suspend_finish(unsigned long val)
 {
 	if (!imx6_suspend_in_ocram_fn) {
 		cpu_do_idle();
-- 
2.55.0