From: Bartosz Golaszewski <bartosz.golaszew...@linaro.org>
We currently duplicate the entire struct pinfunction object in
pinmux_generic_add_pinfunction(). While this is inevitable when the
arguments come in split through pinmux_generic_add_function(), users of
pinmux_generic_add_pinfunction() will typically pass addresses of
structures in .rodata, meaning we can try to avoid the duplication with
the help from kmemdup_const(). To that end: don't wrap the entire struct
pinfunction in struct function_desc but rather just store the address.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszew...@linaro.org>
---
drivers/pinctrl/freescale/pinctrl-imx.c | 2 +-
drivers/pinctrl/mediatek/pinctrl-airoha.c | 2 +-
drivers/pinctrl/mediatek/pinctrl-moore.c | 2 +-
drivers/pinctrl/pinctrl-ingenic.c | 2 +-
drivers/pinctrl/pinmux.c | 23 +++++++++++++++++++----
drivers/pinctrl/pinmux.h | 2 +-
6 files changed, 24 insertions(+), 9 deletions(-)
diff --git a/drivers/pinctrl/freescale/pinctrl-imx.c
b/drivers/pinctrl/freescale/pinctrl-imx.c
index
9ed84479a5b43871861f46fe1326f1dfadc7f63c..0df7eba8ccd3209fbc4b2e67ffdea12b77b90858
100644
--- a/drivers/pinctrl/freescale/pinctrl-imx.c
+++ b/drivers/pinctrl/freescale/pinctrl-imx.c
@@ -266,7 +266,7 @@ static int imx_pmx_set(struct pinctrl_dev *pctldev,
unsigned selector,
npins = grp->grp.npins;
dev_dbg(ipctl->dev, "enable function %s group %s\n",
- func->func.name, grp->grp.name);
+ func->func->name, grp->grp.name);
for (i = 0; i < npins; i++) {
/*
diff --git a/drivers/pinctrl/mediatek/pinctrl-airoha.c
b/drivers/pinctrl/mediatek/pinctrl-airoha.c
index
9a95577439a1b50607427756a713c8122c7c4af1..148b6e235db53290c48d717a994d88cd53c3a135
100644
--- a/drivers/pinctrl/mediatek/pinctrl-airoha.c
+++ b/drivers/pinctrl/mediatek/pinctrl-airoha.c
@@ -2459,7 +2459,7 @@ static int airoha_pinmux_set_mux(struct pinctrl_dev
*pctrl_dev,
return -EINVAL;
dev_dbg(pctrl_dev->dev, "enable function %s group %s\n",
- desc->func.name, grp->grp.name);
+ desc->func->name, grp->grp.name);
func = desc->data;
for (i = 0; i < func->group_size; i++) {
diff --git a/drivers/pinctrl/mediatek/pinctrl-moore.c
b/drivers/pinctrl/mediatek/pinctrl-moore.c
index
ec0005246c19a156079807acddc93bcb767d1222..8ebd731675f69c8b076a7e7767be8ff7c6d3dd79
100644
--- a/drivers/pinctrl/mediatek/pinctrl-moore.c
+++ b/drivers/pinctrl/mediatek/pinctrl-moore.c
@@ -56,7 +56,7 @@ static int mtk_pinmux_set_mux(struct pinctrl_dev *pctldev,
return -EINVAL;
dev_dbg(pctldev->dev, "enable function %s group %s\n",
- func->func.name, grp->grp.name);
+ func->func->name, grp->grp.name);
for (i = 0; i < grp->grp.npins; i++) {
const struct mtk_pin_desc *desc;
diff --git a/drivers/pinctrl/pinctrl-ingenic.c
b/drivers/pinctrl/pinctrl-ingenic.c
index
f89f8ec06ac63227930a38dbc80f00333cc15b48..d81788aea5cb002a86869e22eaab430f7ad18e77
100644
--- a/drivers/pinctrl/pinctrl-ingenic.c
+++ b/drivers/pinctrl/pinctrl-ingenic.c
@@ -4015,7 +4015,7 @@ static int ingenic_pinmux_set_mux(struct pinctrl_dev
*pctldev,
return -EINVAL;
dev_dbg(pctldev->dev, "enable function %s group %s\n",
- func->func.name, grp->grp.name);
+ func->func->name, grp->grp.name);
mode = (uintptr_t)grp->data;
if (mode <= 3) {
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
index
62bd4aa53b2b22cb09eacfb05398205f2fe391b9..504dbb3e97cf334e39b49121137c6768081fcd40
100644
--- a/drivers/pinctrl/pinmux.c
+++ b/drivers/pinctrl/pinmux.c
@@ -810,7 +810,7 @@ pinmux_generic_get_function_name(struct pinctrl_dev
*pctldev,
if (!function)
return NULL;
- return function->func.name;
+ return function->func->name;
}
EXPORT_SYMBOL_GPL(pinmux_generic_get_function_name);
@@ -835,8 +835,8 @@ int pinmux_generic_get_function_groups(struct pinctrl_dev
*pctldev,
__func__, selector);
return -EINVAL;
}
- *groups = function->func.groups;
- *ngroups = function->func.ngroups;
+ *groups = function->func->groups;
+ *ngroups = function->func->ngroups;
return 0;
}
@@ -903,7 +903,22 @@ int pinmux_generic_add_pinfunction(struct pinctrl_dev
*pctldev,
if (!function)
return -ENOMEM;
- function->func = *func;
+ function->func = kmemdup_const(func, sizeof(*func), GFP_KERNEL);
+ if (!function->func)
+ return -ENOMEM;
+
+ /*
+ * FIXME: It's generally a bad idea to use devres in subsystem core
+ * code - managed interfaces are aimed at drivers - but pinctrl already
+ * uses it all over the place so it's a larger piece of technical debt
+ * to fix.
+ */
+ error = devm_add_action_or_reset(pctldev->dev,
+ (void (*)(void *))kfree_const,
+ (void *)function->func);
+ if (error)
+ return error;
+
function->data = data;
error = radix_tree_insert(&pctldev->pin_function_tree, selector,
function);
diff --git a/drivers/pinctrl/pinmux.h b/drivers/pinctrl/pinmux.h
index
549ab10f7afbda32fadf4ad151401180bed2064f..653684290666d78fd725febb5f8bc987b66a1afb
100644
--- a/drivers/pinctrl/pinmux.h
+++ b/drivers/pinctrl/pinmux.h
@@ -137,7 +137,7 @@ static inline void pinmux_init_device_debugfs(struct dentry
*devroot,
* @data: pin controller driver specific data
*/
struct function_desc {
- struct pinfunction func;
+ const struct pinfunction *func;
void *data;
};
--
2.48.1
