diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-tegra194.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c index 55c8afb9a899..f2e49dda2c83 100644 --- a/drivers/pci/controller/dwc/pcie-tegra194.c +++ b/drivers/pci/controller/dwc/pcie-tegra194.c @@ -1493,6 +1493,16 @@ static void tegra_pcie_dw_pme_turnoff(struct tegra_pcie_dw *pcie) return; } + /* + * PCIe controller exits from L2 only if reset is applied, so + * controller doesn't handle interrupts. But in cases where + * L2 entry fails, PERST# is asserted which can trigger surprise + * link down AER. However this function call happens in + * suspend_noirq(), so AER interrupt will not be processed. + * Disable all interrupts to avoid such a scenario. + */ + appl_writel(pcie, 0x0, APPL_INTR_EN_L0_0); + if (tegra_pcie_try_link_l2(pcie)) { dev_info(pcie->dev, "Link didn't transition to L2 state\n"); /* |