From mboxrd@z Thu Jan 1 00:00:00 1970 From: balbi@ti.com (Felipe Balbi) Date: Mon, 5 May 2014 13:36:06 -0500 Subject: [RFC PATCH 1/5] watchdog: Add API to trigger reboots In-Reply-To: <1398958893-30049-2-git-send-email-linux@roeck-us.net> References: <1398958893-30049-1-git-send-email-linux@roeck-us.net> <1398958893-30049-2-git-send-email-linux@roeck-us.net> Message-ID: <20140505183606.GJ17875@saruman.home> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, May 01, 2014 at 08:41:29AM -0700, Guenter Roeck wrote: > Some hardware implements reboot through its watchdog hardware, > for example by triggering a watchdog timeout. Platform specific > code starts to spread into watchdog drivers, typically by setting > pointers to a callback functions which is then called from the > platform reset handler. > > To simplify code and provide a unified API to trigger reboots by > watchdog drivers, provide a single API to trigger such reboots > through the watchdog subsystem. > > Signed-off-by: Guenter Roeck > --- > drivers/watchdog/watchdog_core.c | 17 +++++++++++++++++ > include/linux/watchdog.h | 11 +++++++++++ > 2 files changed, 28 insertions(+) > > diff --git a/drivers/watchdog/watchdog_core.c b/drivers/watchdog/watchdog_core.c > index cec9b55..4ec6e2f 100644 > --- a/drivers/watchdog/watchdog_core.c > +++ b/drivers/watchdog/watchdog_core.c > @@ -43,6 +43,17 @@ > static DEFINE_IDA(watchdog_ida); > static struct class *watchdog_class; > > +static struct watchdog_device *wdd_reboot_dev; > + > +void watchdog_do_reboot(enum reboot_mode mode, const char *cmd) > +{ > + if (wdd_reboot_dev) { > + if (wdd_reboot_dev->ops->reboot) you can decrease one level of indentation: if (wdd_reboot_dev && wdd_reboot_dev->ops->reboot) also, shouldn't you test if 'ops' is valid too ? In that case: if (wdd_reboot_dev && wdd_reboot_dev->ops && wdd_reboot_dev->ops->reboot) -- balbi -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: Digital signature URL: