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ddf77bbe78
mutex_lock() is called from MEC1322_IRQ_ACPIEC0_IBF interrupt context, causing deadlock and assertion in __wait_evt(). In the interrupt context it now checks for mutex lock first. If the mutex is already locked,, it will disable ACPI interrupts and defer the memmap mutex lock. Added LPC interrupt disable/enable functions as needed. Increased deferred function count where needed. BRANCH=None BUG=chrome-os-partner:40820 TEST=Test for suspend-resume, cold, warm reboots and other general stability. Change-Id: I3dda0d4635a6b6281faf200c8c7b6fcba8877254 Signed-off-by: Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.com> Reviewed-on: https://chromium-review.googlesource.com/280418 Reviewed-by: Randall Spangler <rspangler@chromium.org> Reviewed-by: Shawn N <shawnn@chromium.org> Commit-Queue: Divya Jyothi <divya.jyothi@intel.com> Tested-by: Divya Jyothi <divya.jyothi@intel.com>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit