bus: ti-sysc: Fix error handling for sysc_check_active_timer()

We have changed the return type for sysc_check_active_timer() from -EBUSY
to -ENXIO, but the gpt12 system timer fix still checks for -EBUSY. We are
also not returning on other errors like we did earlier as noted by
Pavel Machek <[email protected]>.

Commit 3ff340e ("bus: ti-sysc: Fix gpt12 system timer issue with
reserved status") should have been updated for commit 65fb736
("bus: ti-sysc: suppress err msg for timers used as clockevent/source").

Let's fix the issue by checking for -ENXIO and returning on any other
errors as suggested by Pavel Machek <[email protected]>.

Fixes: 3ff340e ("bus: ti-sysc: Fix gpt12 system timer issue with reserved status")
Depends-on: 65fb736 ("bus: ti-sysc: suppress err msg for timers used as clockevent/source")
Reported-by: Pavel Machek <[email protected]>
Reviewed-by: Pavel Machek (CIP) <[email protected]>
Cc: Grygorii Strashko <[email protected]>
Cc: Jarkko Nikula <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>

Author: tmlind

drivers/bus/ti-sysc.c

@@ -3097,8 +3097,10 @@ static int sysc_probe(struct platform_device *pdev)
 		return error;
 
 	error = sysc_check_active_timer(ddata);
-	if (error == -EBUSY)
+	if (error == -ENXIO)
 		ddata->reserved = true;
+	else if (error)
+		return error;
 
 	error = sysc_get_clocks(ddata);
 	if (error)