[Bug 880472] Re: fwts: CMOS reading should have interrupts disabled during a read op

Colin King 880472 at bugs.launchpad.net
Mon Dec 5 12:46:20 UTC 2011


.."fix committed" was marked in this bug by me as the commit has been
committed to the git repo - however, the new changes have not been
uploaded.

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Title:
  fwts: CMOS reading should have interrupts disabled during a read op

Status in “fwts” package in Ubuntu:
  Fix Committed

Bug description:
  To stop any potential race conditions between writing to port 0x70 and
  reading from port 0x71 we should disable interrupts to be safe.  We
  can do this by:

  iopl(3);
  asm("cli");
  write to port 0x70
  read data from port 0x71
  asm("sti");
  iopl(0);

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