Messages in this thread | | | Date | Thu, 20 Sep 2012 17:06:47 +0000 | From | "Serge E. Hallyn" <> | Subject | Re: [PATCH V2] poweroff: fix bug in orderly_poweroff |
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Quoting hongfeng (hongfeng@marvell.com): > orderly_poweroff is trying to poweroff platform by two steps: > step 1: Call userspace application to poweroff > step 2: If userspace poweroff fail, then do a force power off if force param is set. > > The bug here is, step 1 is always successful with param UMH_NO_WAIT,
Note that a changelog here explaining that you switched to UMH_WAIT_EXEC per Eric's suggestion would be both informative and courteous.
> should change to UMH_WAIT_EXEC which will monitor whether user application successful run.
Is this actually sufficient for you? The exec will have started, but may for whatever (very unlikely) reason fail. If you're happy with it,
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
> Change-Id: I2f9ebbb90c0c2443780080ec9507c8d004e5da74 > Signed-off-by: Feng Hong <hongfeng@marvell.com> > Acked-by: Kees Cook <keescook@chromium.org> > --- > kernel/sys.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/kernel/sys.c b/kernel/sys.c > index 241507f..a624d4c 100644 > --- a/kernel/sys.c > +++ b/kernel/sys.c > @@ -2204,7 +2204,7 @@ static int __orderly_poweroff(void) > return -ENOMEM; > } > > - ret = call_usermodehelper_fns(argv[0], argv, envp, UMH_NO_WAIT, > + ret = call_usermodehelper_fns(argv[0], argv, envp, UMH_WAIT_EXEC, > NULL, argv_cleanup, NULL); > if (ret == -ENOMEM) > argv_free(argv); > -- > 1.7.0.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
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