If the endpoint device state is D0 and irq's are not freed, then kernel try to mask interrupts by writing in to the vector table (for MSIX interrupts) and config space (for MSI's). These transactions are initiated after clocks are getting disabled as part of PM suspend call. Due to it, these transactions are resulting in un-clocked access and eventual to crashes. So added a logic in qcom driver to restrict the unclocked access. And updated the logic to check the link state before masking or unmasking the interrupts. Krishna chaitanya chundru (2): PCI: qcom: Add system PM support PCI: qcom: Restrict pci transactions after pci suspend drivers/pci/controller/dwc/pcie-designware-host.c | 14 ++- drivers/pci/controller/dwc/pcie-qcom.c | 116 +++++++++++++++++++++- 2 files changed, 126 insertions(+), 4 deletions(-) -- 2.7.4
