From e9bb4a068b206f61ef01057cfeafdb852fb244c5 Mon Sep 17 00:00:00 2001 From: AngeloGioacchino Del Regno Date: Sat, 26 Sep 2020 14:55:43 +0200 Subject: regulator: core: Enlarge max OF property name length to 64 chars Some regulator drivers may be defining very long names: this is the case with the qcom_smd and qcom_spmi regulators, where we need to parse the regulator parents from DT. For clarity, this is an example: { "l13a", QCOM_SMD_RPM_LDOA, 13, &pm660_ht_lvpldo, "vdd_l8_l9_l10_l11_l12_l13_l14" }, pm660-regulators { ... vdd_l8_l9_l10_l11_l12_l13_l14-supply = <&vreg_s4a_2p04> ... }; Now, with a 32 characters limit, the function is trying to parse, exactly, "vdd_l8_l9_l10_l11_l12_l13_l14-s" (32 chars) instead of the right one, which is 37 chars long in this specific case. ... And this is not only the case with PM660/PM660L, but also with PMA8084, PM8916, PM8950 and others that are not implemented yet. The length of 64 chars was chosen based on the longest parsed property name that I could find, which is in PM8916, and would be 53 characters long. At that point, rounding that to 64 looked like being the best idea. Signed-off-by: AngeloGioacchino Del Regno Link: https://lore.kernel.org/r/20200926125549.13191-2-kholk11@gmail.com Signed-off-by: Mark Brown --- drivers/regulator/core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/regulator/core.c') diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 9f704a6c4802..16497192e99b 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -404,11 +404,11 @@ err_node_put: static struct device_node *of_get_regulator(struct device *dev, const char *supply) { struct device_node *regnode = NULL; - char prop_name[32]; /* 32 is max size of property name */ + char prop_name[64]; /* 64 is max size of property name */ dev_dbg(dev, "Looking up %s-supply from device tree\n", supply); - snprintf(prop_name, 32, "%s-supply", supply); + snprintf(prop_name, 64, "%s-supply", supply); regnode = of_parse_phandle(dev->of_node, prop_name, 0); if (!regnode) { -- cgit v1.2.3-59-g8ed1b