Messages in this thread | | | Date | Fri, 27 Oct 2017 18:53:14 +0900 | From | Sergey Senozhatsky <> | Subject | Re: [PATCH V2] panic: add support to update panic_timeout via DT |
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Cc-ing Andrew on this
v1: lkml.kernel.org/r/1509076662-22253-1-git-send-email-jburman@nvidia.com lkml.kernel.org/r/20171027080006.GA609@tigerII.localdomain
v2: lkml.kernel.org/r/1509097165-15695-1-git-send-email-jburman@nvidia.com
-ss
On (10/27/17 15:09), Jeetesh Burman wrote: > Add support to set 'panic_timeout' value via dtb to have > control from device tree. This makes sense when you have > multiple platforms support from same defconfig and > differentiated only through device tree blob. > The patch will check for panic time out value coming > from dtb if it exists, otherwise continues with > defconfig provided option. > > Signed-off-by: Jeetesh Burman <jburman@nvidia.com> > --- > kernel/panic.c | 11 +++++++++-- > 1 file changed, 9 insertions(+), 2 deletions(-) > > diff --git a/kernel/panic.c b/kernel/panic.c > index bdd18af..b487331 100644 > --- a/kernel/panic.c > +++ b/kernel/panic.c > @@ -27,6 +27,7 @@ > #include <linux/console.h> > #include <linux/bug.h> > #include <linux/ratelimit.h> > +#include <linux/of.h> > > #define PANIC_TIMER_STEP 100 > #define PANIC_BLINK_SPD 18 > @@ -482,9 +483,15 @@ static u64 oops_id; > > static int init_oops_id(void) > { > - if (!oops_id) > + struct device_node *np; > + > + if (!oops_id) { > + np = of_find_node_by_name(NULL, "panic_timeout"); > + if (np) > + of_property_read_u32(np, "panic-timeout-value", > + &panic_timeout); > get_random_bytes(&oops_id, sizeof(oops_id)); > - else > + } else > oops_id++; > > return 0; > -- > 2.1.4 >
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