rtc: Disable EFI rtc for x86
authorMatt Fleming <matt.fleming@intel.com>
Fri, 3 Oct 2014 12:06:33 +0000 (13:06 +0100)
committerMatt Fleming <matt.fleming@intel.com>
Fri, 3 Oct 2014 20:24:17 +0000 (21:24 +0100)
commit7efe665903d0d963b0ebf4cab25cc3ae32c62600
tree333c56315d4d087469a963a5c68303c60434de06
parent3f71f6da7791a5feae0ff07e718431d1df01273a
rtc: Disable EFI rtc for x86

commit da167ad7638759 ("rtc: ia64: allow other architectures to use EFI
RTC") inadvertently introduced a regression for x86 because we've been
careful not to enable the EFI rtc driver due to the generally buggy
implementations of the time-related EFI runtime services.

In fact, since the above commit was merged we've seen reports of crashes
on 32-bit tablets,

  https://bugzilla.kernel.org/show_bug.cgi?id=84241#c21

Disable it explicitly for x86 so that we don't give users false hope
that this driver will work - it won't, and your machine is likely to
crash.

Acked-by: Mark Salter <msalter@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: <stable@vger.kernel.org> # v3.17
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
drivers/rtc/Kconfig