Re: [PATCH] ARM: OMAP2+: omap_device: use late_initcall_sync
* Kevin Hilman khil...@linaro.org [130507 14:44]: 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: Tony Lindgren t...@atomide.com Signed-off-by: Kevin Hilman khil...@linaro.org Thanks applying into omap-for-v3.10/fixes. Tony --- Based on v3.9-rc8 arch/arm/mach-omap2/omap_device.c | 2 +- arch/arm/mach-omap2/soc.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c index 381be7a..2d20d69 100644 --- a/arch/arm/mach-omap2/omap_device.c +++ b/arch/arm/mach-omap2/omap_device.c @@ -879,4 +879,4 @@ 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); diff --git a/arch/arm/mach-omap2/soc.h b/arch/arm/mach-omap2/soc.h index c62116b..de88611 100644 --- a/arch/arm/mach-omap2/soc.h +++ b/arch/arm/mach-omap2/soc.h @@ -494,6 +494,7 @@ 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__ */ -- 1.8.2 -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH] 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: Tony Lindgren t...@atomide.com Signed-off-by: Kevin Hilman khil...@linaro.org --- Based on v3.9-rc8 arch/arm/mach-omap2/omap_device.c | 2 +- arch/arm/mach-omap2/soc.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c index 381be7a..2d20d69 100644 --- a/arch/arm/mach-omap2/omap_device.c +++ b/arch/arm/mach-omap2/omap_device.c @@ -879,4 +879,4 @@ 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); diff --git a/arch/arm/mach-omap2/soc.h b/arch/arm/mach-omap2/soc.h index c62116b..de88611 100644 --- a/arch/arm/mach-omap2/soc.h +++ b/arch/arm/mach-omap2/soc.h @@ -494,6 +494,7 @@ 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__ */ -- 1.8.2 -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
