Commit e7e17c53 authored by Kevin Hilman's avatar Kevin Hilman Committed by Tony Lindgren
Browse files

ARM: OMAP2+: omap_device: use late_initcall_sync



If DEBUG_LL and earlyprintk are enabled, and omap-serial.c is compiled
as a module, the kernel boot hangs early as the clocks for serial port
are cut while earlyprintk still uses the port.

The problem is a race between the late_initcall for omap_device (which
idles devices that have no drivers) and the late_initcall in
kernel/printk.c which turns off the earlyconsole.   Any printks
that happen between this omap_device late initcall and the earlyconsole
late initcall will crash when accessing the UART.

The fix is to ensure the omap_device initcall happens after the
earlyconsole initcall.
Reported-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarKevin Hilman <khilman@linaro.org>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent e65f131a
......@@ -876,4 +876,4 @@ static int __init omap_device_late_init(void)
bus_for_each_dev(&platform_bus_type, NULL, NULL, omap_device_late_idle);
return 0;
}
omap_late_initcall(omap_device_late_init);
omap_late_initcall_sync(omap_device_late_init);
......@@ -496,6 +496,7 @@ level(__##fn);
#define omap_subsys_initcall(fn) omap_initcall(subsys_initcall, fn)
#define omap_device_initcall(fn) omap_initcall(device_initcall, fn)
#define omap_late_initcall(fn) omap_initcall(late_initcall, fn)
#define omap_late_initcall_sync(fn) omap_initcall(late_initcall_sync, fn)
#endif /* __ASSEMBLY__ */
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