[PATCH 01/11] phy: qcom-qmp-pcie: add pcs_misc sanity check

Johan Hovold
2022-09-14T16:27:07Z

Make sure that the (otherwise) optional pcs_misc IO region has been
provided in case the configuration specifies a corresponding
initialisation table to avoid crashing with malformed devicetrees.

Note that the related debug message is now superfluous as the region is
only used when the configuration has a pcs_misc table.

Fixes: 421c9a0e9731 ("phy: qcom: qmp: Add SDM845 PCIe QMP PHY support")
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
index e6bffb0e2da3..05e73625a619 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
@@ -2300,8 +2300,10 @@ static int qmp_pcie_create(struct device *dev, struct device_node *np, int id,
of_device_is_compatible(dev->of_node, "qcom,ipq6018-qmp-pcie-phy"))
qphy->pcs_misc = qphy->pcs + 0x400;

- if (!qphy->pcs_misc)
- dev_vdbg(dev, "PHY pcs_misc-reg not used\n");
+ if (!qphy->pcs_misc) {
+ if (cfg->pcs_misc_tbl || cfg->pcs_misc_tbl_sec)
+ return -EINVAL;
+ }

qphy->pipe_clk = devm_get_clk_from_child(dev, np, NULL);
if (IS_ERR(qphy->pipe_clk)) {
--
2.35.1