Patch "pinctrl: tegra: Duplicate pinmux functions table" has been added to the 6.4-stable tree

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This is a note to let you know that I've just added the patch titled

    pinctrl: tegra: Duplicate pinmux functions table

to the 6.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     pinctrl-tegra-duplicate-pinmux-functions-table.patch
and it can be found in the queue-6.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 6ef5a5d5bc1db1d5deaab60f4ee4ef6be027f01b
Author: Thierry Reding <treding@xxxxxxxxxx>
Date:   Tue May 30 12:53:07 2023 +0200

    pinctrl: tegra: Duplicate pinmux functions table
    
    [ Upstream commit fad57233501beb5bd25f037cb9128a533e710600 ]
    
    The function table is filled with group information based on other
    instance-specific data at runtime. However, the function table can be
    shared between multiple instances, causing the ->probe() function for
    one instance to overwrite the table of a previously probed instance.
    
    Fix this by sharing only the function names and allocating a separate
    function table for each instance.
    
    Fixes: 5a0047360743 ("pinctrl: tegra: Separate Tegra194 instances")
    Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230530105308.1292852-1-thierry.reding@xxxxxxxxx
    Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.c b/drivers/pinctrl/tegra/pinctrl-tegra.c
index 1729b7ddfa946..21e08fbd1df0e 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra.c
+++ b/drivers/pinctrl/tegra/pinctrl-tegra.c
@@ -232,7 +232,7 @@ static const char *tegra_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
 {
 	struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 
-	return pmx->soc->functions[function].name;
+	return pmx->functions[function].name;
 }
 
 static int tegra_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
@@ -242,8 +242,8 @@ static int tegra_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
 {
 	struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
 
-	*groups = pmx->soc->functions[function].groups;
-	*num_groups = pmx->soc->functions[function].ngroups;
+	*groups = pmx->functions[function].groups;
+	*num_groups = pmx->functions[function].ngroups;
 
 	return 0;
 }
@@ -795,10 +795,17 @@ int tegra_pinctrl_probe(struct platform_device *pdev,
 	if (!pmx->group_pins)
 		return -ENOMEM;
 
+	pmx->functions = devm_kcalloc(&pdev->dev, pmx->soc->nfunctions,
+				      sizeof(*pmx->functions), GFP_KERNEL);
+	if (!pmx->functions)
+		return -ENOMEM;
+
 	group_pins = pmx->group_pins;
+
 	for (fn = 0; fn < soc_data->nfunctions; fn++) {
-		struct tegra_function *func = &soc_data->functions[fn];
+		struct tegra_function *func = &pmx->functions[fn];
 
+		func->name = pmx->soc->functions[fn];
 		func->groups = group_pins;
 
 		for (gn = 0; gn < soc_data->ngroups; gn++) {
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.h b/drivers/pinctrl/tegra/pinctrl-tegra.h
index 6130cba7cce54..b3289bdf727d8 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra.h
+++ b/drivers/pinctrl/tegra/pinctrl-tegra.h
@@ -13,6 +13,7 @@ struct tegra_pmx {
 	struct pinctrl_dev *pctl;
 
 	const struct tegra_pinctrl_soc_data *soc;
+	struct tegra_function *functions;
 	const char **group_pins;
 
 	struct pinctrl_gpio_range gpio_range;
@@ -191,7 +192,7 @@ struct tegra_pinctrl_soc_data {
 	const char *gpio_compatible;
 	const struct pinctrl_pin_desc *pins;
 	unsigned npins;
-	struct tegra_function *functions;
+	const char * const *functions;
 	unsigned nfunctions;
 	const struct tegra_pingroup *groups;
 	unsigned ngroups;
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra114.c b/drivers/pinctrl/tegra/pinctrl-tegra114.c
index e72ab1eb23983..3d425b2018e78 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra114.c
+++ b/drivers/pinctrl/tegra/pinctrl-tegra114.c
@@ -1452,12 +1452,9 @@ enum tegra_mux {
 	TEGRA_MUX_VI_ALT3,
 };
 
-#define FUNCTION(fname)					\
-	{						\
-		.name = #fname,				\
-	}
+#define FUNCTION(fname) #fname
 
-static struct tegra_function tegra114_functions[] = {
+static const char * const tegra114_functions[] = {
 	FUNCTION(blink),
 	FUNCTION(cec),
 	FUNCTION(cldvfs),
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra124.c b/drivers/pinctrl/tegra/pinctrl-tegra124.c
index 26096c6b967e2..2a50c5c7516c3 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra124.c
+++ b/drivers/pinctrl/tegra/pinctrl-tegra124.c
@@ -1611,12 +1611,9 @@ enum tegra_mux {
 	TEGRA_MUX_VIMCLK2_ALT,
 };
 
-#define FUNCTION(fname)					\
-	{						\
-		.name = #fname,				\
-	}
+#define FUNCTION(fname) #fname
 
-static struct tegra_function tegra124_functions[] = {
+static const char * const tegra124_functions[] = {
 	FUNCTION(blink),
 	FUNCTION(ccla),
 	FUNCTION(cec),
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra194.c b/drivers/pinctrl/tegra/pinctrl-tegra194.c
index 277973c884344..69f58df628977 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra194.c
+++ b/drivers/pinctrl/tegra/pinctrl-tegra194.c
@@ -1189,12 +1189,9 @@ enum tegra_mux_dt {
 };
 
 /* Make list of each function name */
-#define TEGRA_PIN_FUNCTION(lid)			\
-	{					\
-		.name = #lid,			\
-	}
+#define TEGRA_PIN_FUNCTION(lid) #lid
 
-static struct tegra_function tegra194_functions[] = {
+static const char * const tegra194_functions[] = {
 	TEGRA_PIN_FUNCTION(rsvd0),
 	TEGRA_PIN_FUNCTION(rsvd1),
 	TEGRA_PIN_FUNCTION(rsvd2),
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra20.c b/drivers/pinctrl/tegra/pinctrl-tegra20.c
index 0dc2cf0d05b1e..737fc2000f66b 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra20.c
+++ b/drivers/pinctrl/tegra/pinctrl-tegra20.c
@@ -1889,12 +1889,9 @@ enum tegra_mux {
 	TEGRA_MUX_XIO,
 };
 
-#define FUNCTION(fname)					\
-	{						\
-		.name = #fname,				\
-	}
+#define FUNCTION(fname) #fname
 
-static struct tegra_function tegra20_functions[] = {
+static const char * const tegra20_functions[] = {
 	FUNCTION(ahb_clk),
 	FUNCTION(apb_clk),
 	FUNCTION(audio_sync),
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra210.c b/drivers/pinctrl/tegra/pinctrl-tegra210.c
index b480f607fa16f..9bb29146dfff7 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra210.c
+++ b/drivers/pinctrl/tegra/pinctrl-tegra210.c
@@ -1185,12 +1185,9 @@ enum tegra_mux {
 	TEGRA_MUX_VIMCLK2,
 };
 
-#define FUNCTION(fname)					\
-	{						\
-		.name = #fname,				\
-	}
+#define FUNCTION(fname) #fname
 
-static struct tegra_function tegra210_functions[] = {
+static const char * const tegra210_functions[] = {
 	FUNCTION(aud),
 	FUNCTION(bcl),
 	FUNCTION(blink),
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra30.c b/drivers/pinctrl/tegra/pinctrl-tegra30.c
index 7299a371827f1..de5aa2d4d28d3 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra30.c
+++ b/drivers/pinctrl/tegra/pinctrl-tegra30.c
@@ -2010,12 +2010,9 @@ enum tegra_mux {
 	TEGRA_MUX_VI_ALT3,
 };
 
-#define FUNCTION(fname)					\
-	{						\
-		.name = #fname,				\
-	}
+#define FUNCTION(fname) #fname
 
-static struct tegra_function tegra30_functions[] = {
+static const char * const tegra30_functions[] = {
 	FUNCTION(blink),
 	FUNCTION(cec),
 	FUNCTION(clk_12m_out),



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