[PATCH 08/11] PCI: tegra194: Guard Endpoint PLL-off error path

[Manikanta Maddireddy <mmaddireddy@nvidia.com>]

The Endpoint PERST# deassert path initializes the external-refclk PLL only
when enable_ext_refclk is set, but the error unwind always sent the PLL-off
request.

Guard the PLL-off request with enable_ext_refclk so Tegra234 Endpoint
configurations that did not enable the PLL do not send a spurious BPMP
PLL-off command.

Fixes: a54e19073718 ("PCI: tegra194: Add Tegra234 PCIe support")
Signed-off-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
---
 drivers/pci/controller/dwc/pcie-tegra194.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index f8e39459db41..637779993c40 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -1973,7 +1973,8 @@ static void pex_ep_event_pex_rst_deassert(struct tegra_pcie_dw *pcie)
 fail_core_apb_rst:
 	clk_disable_unprepare(pcie->core_clk);
 fail_core_clk_enable:
-	tegra_pcie_bpmp_set_pll_state(pcie, false);
+	if (pcie->enable_ext_refclk)
+		tegra_pcie_bpmp_set_pll_state(pcie, false);
 fail_pll_init:
 	tegra_pcie_bpmp_set_ctrl_state(pcie, false);
 fail_set_ctrl_state:
-- 
2.34.1