linux-kernel - [PATCH 1/1] pinctrl: stmfx: fix valid

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 4 Nov 2019 11:09:08 +0100
From:   Amelie Delaunay <amelie.delaunay@...com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>
CC:     <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        Amelie Delaunay <amelie.delaunay@...com>
Subject: [PATCH 1/1] pinctrl: stmfx: fix valid_mask init sequence

With stmfx_pinctrl_gpio_init_valid_mask callback, gpio_valid_mask was used
to initialize gpiochip valid_mask for gpiolib. But gpio_valid_mask was not
yet initialized. gpio_valid_mask required gpio-ranges to be registered,
this is the case after gpiochip_add_data call. But init_valid_mask
callback is also called under gpiochip_add_data. gpio_valid_mask
initialization cannot be moved before gpiochip_add_data because
gpio-ranges are not registered.
So, it is not possible to use init_valid_mask callback.
To avoid this issue, get rid of valid_mask and rely on ranges.

Fixes: da9b142ab2c5 ("pinctrl: stmfx: Use the callback to populate valid_mask")
Signed-off-by: Amelie Delaunay <amelie.delaunay@...com>
---
 drivers/pinctrl/pinctrl-stmfx.c | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-stmfx.c b/drivers/pinctrl/pinctrl-stmfx.c
index 564660028fcc..ccdf0bb21414 100644
--- a/drivers/pinctrl/pinctrl-stmfx.c
+++ b/drivers/pinctrl/pinctrl-stmfx.c
@@ -585,19 +585,6 @@ static int stmfx_pinctrl_gpio_function_enable(struct stmfx_pinctrl *pctl)
 	return stmfx_function_enable(pctl->stmfx, func);
 }
 
-static int stmfx_pinctrl_gpio_init_valid_mask(struct gpio_chip *gc,
-					      unsigned long *valid_mask,
-					      unsigned int ngpios)
-{
-	struct stmfx_pinctrl *pctl = gpiochip_get_data(gc);
-	u32 n;
-
-	for_each_clear_bit(n, &pctl->gpio_valid_mask, ngpios)
-		clear_bit(n, valid_mask);
-
-	return 0;
-}
-
 static int stmfx_pinctrl_probe(struct platform_device *pdev)
 {
 	struct stmfx *stmfx = dev_get_drvdata(pdev->dev.parent);
@@ -660,7 +647,6 @@ static int stmfx_pinctrl_probe(struct platform_device *pdev)
 	pctl->gpio_chip.ngpio = pctl->pctl_desc.npins;
 	pctl->gpio_chip.can_sleep = true;
 	pctl->gpio_chip.of_node = np;
-	pctl->gpio_chip.init_valid_mask = stmfx_pinctrl_gpio_init_valid_mask;
 
 	ret = devm_gpiochip_add_data(pctl->dev, &pctl->gpio_chip, pctl);
 	if (ret) {
-- 
2.17.1