From mboxrd@z Thu Jan 1 00:00:00 1970 From: heiko@sntech.de (Heiko =?ISO-8859-1?Q?St=FCbner?=) Date: Sat, 09 Aug 2014 22:01:21 +0200 Subject: [PATCH v6 3/7] arm: Support restart through restart handler call chain In-Reply-To: <1407203338-12915-4-git-send-email-linux@roeck-us.net> References: <1407203338-12915-1-git-send-email-linux@roeck-us.net> <1407203338-12915-4-git-send-email-linux@roeck-us.net> Message-ID: <2985231.leR3BbmHFl@diego> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Guenter, Am Montag, 4. August 2014, 18:48:54 schrieb Guenter Roeck: > The kernel core now supports a restart handler call chain for system > restart functions. > > With this change, the arm_pm_restart callback is now optional, so check > if it is set before calling it. Only call the kernel restart handler > if arm_pm_restart is not set. > > Signed-off-by: Guenter Roeck > Acked-by: Catalin Marinas > Acked-by: Heiko Stuebner > --- > v6: No change. > v5: Renamed restart function to do_kernel_restart > v4: No change. > v3: Use wrapper function to execute notifier call chain. > v2: Only call notifier call chain if arm_pm_restart is not set. > Do not include linux/watchdog.h. > > arch/arm/kernel/process.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c > index 81ef686..84ca0d5 100644 > --- a/arch/arm/kernel/process.c > +++ b/arch/arm/kernel/process.c > @@ -230,7 +230,10 @@ void machine_restart(char *cmd) > local_irq_disable(); > smp_send_stop(); > > - arm_pm_restart(reboot_mode, cmd); > + if (arm_pm_restart) > + arm_pm_restart(reboot_mode, cmd); > + else > + do_kernel_restart(cmd); > > /* Give a grace period for failure to restart of 1s */ > mdelay(1000); shouldn't you also get rid of void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd) = null_restart; like a previous attempt at unifying the restart handling [0] did. Because when testing the current series on my Rockchip boards, there was always an arm_pm_restart defined ... namely the null_restart mentioned above. So do_kernel_restart is never reached until I disable the null_restart. Heiko [0] http://permalink.gmane.org/gmane.linux.ports.arm.kernel/277042