[PATCH 0/1] EmbeddedPkg: Fix multiple Virtual RTC issues

[Pete Batard <pete@akeo.ie>]

This patch fixes multiple issues in VirtualRealTimeClockLib.c:

1. Use of two separate variables (ElapsedSeconds and EpochSeconds) in
   LibGetTime(), where only a single one should have been used.

2. Possible underflow while sustracting TZ/DST offsets in LibSetTime()
   if the user sets a date that is very close to start of epoch.

3. Non substraction of elpased seconds since reset, which would lead to
   the following behaviour in UEFI shell (assuming for this example that
   exactly 5 minutes have elapsed since platform reset):

     Shell> time 12:00:00
     Shell> time
     12:05:01 (LOCAL)

   In other words, setting and immediately reading back the time would
   result in the returned value being offset by the time since reset.

   This last behaviour has been observed (and confirmed fixed) using an
   RPi3 platform.

Regards,

/Pete

Pete Batard (1):
  EmbeddedPkg: Fix multiple Virtual RTC issues

 .../VirtualRealTimeClockLib.c                 | 34 ++++++++++++++-----
 1 file changed, 25 insertions(+), 9 deletions(-)

-- 
2.17.0.windows.1