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From: "Paweł Chmiel" <pawel.mikolaj.chmiel@gmail.com>
To: tomasz.figa@gmail.com, krzk@kernel.org, s.nawrocki@samsung.com
Cc: linus.walleij@linaro.org, kgene@kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org, linux-gpio@vger.kernel.org,
	linux-kernel@vger.kernel.org, pawel.mikolaj.chmiel@gmail.com
Subject: [PATCH] pinctrl/samsung: Correct EINTG banks order
Date: Sun,  8 Apr 2018 20:07:47 +0200	[thread overview]
Message-ID: <1523210867-3806-1-git-send-email-pawel.mikolaj.chmiel@gmail.com> (raw)

All banks with GPIO interrupts should be at beginning
of bank array and without any other types of banks between them.
This order is expected by exynos_eint_gpio_irq, when doing
interrupt group to bank translation.
Otherwise, kernel NULL pointer dereference would happen
when trying to handle interrupt, due to wrong bank being looked up.
Observed on s5pv210, when trying to handle gpj0 interrupt,
where kernel was mapping it to gpi bank.

Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
---
 drivers/pinctrl/samsung/pinctrl-exynos-arm.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/pinctrl/samsung/pinctrl-exynos-arm.c b/drivers/pinctrl/samsung/pinctrl-exynos-arm.c
index 90c2744..de4ab07 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos-arm.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos-arm.c
@@ -105,12 +105,12 @@ static const struct samsung_pin_bank_data s5pv210_pin_bank[] __initconst = {
 	EXYNOS_PIN_BANK_EINTG(7, 0x1c0, "gpg1", 0x38),
 	EXYNOS_PIN_BANK_EINTG(7, 0x1e0, "gpg2", 0x3c),
 	EXYNOS_PIN_BANK_EINTG(7, 0x200, "gpg3", 0x40),
-	EXYNOS_PIN_BANK_EINTN(7, 0x220, "gpi"),
 	EXYNOS_PIN_BANK_EINTG(8, 0x240, "gpj0", 0x44),
 	EXYNOS_PIN_BANK_EINTG(6, 0x260, "gpj1", 0x48),
 	EXYNOS_PIN_BANK_EINTG(8, 0x280, "gpj2", 0x4c),
 	EXYNOS_PIN_BANK_EINTG(8, 0x2a0, "gpj3", 0x50),
 	EXYNOS_PIN_BANK_EINTG(5, 0x2c0, "gpj4", 0x54),
+	EXYNOS_PIN_BANK_EINTN(7, 0x220, "gpi"),
 	EXYNOS_PIN_BANK_EINTN(8, 0x2e0, "mp01"),
 	EXYNOS_PIN_BANK_EINTN(4, 0x300, "mp02"),
 	EXYNOS_PIN_BANK_EINTN(8, 0x320, "mp03"),
@@ -158,9 +158,6 @@ static const struct samsung_pin_bank_data exynos3250_pin_banks0[] __initconst =
 
 /* pin banks of exynos3250 pin-controller 1 */
 static const struct samsung_pin_bank_data exynos3250_pin_banks1[] __initconst = {
-	EXYNOS_PIN_BANK_EINTN(8, 0x120, "gpe0"),
-	EXYNOS_PIN_BANK_EINTN(8, 0x140, "gpe1"),
-	EXYNOS_PIN_BANK_EINTN(3, 0x180, "gpe2"),
 	EXYNOS_PIN_BANK_EINTG(8, 0x040, "gpk0", 0x08),
 	EXYNOS_PIN_BANK_EINTG(7, 0x060, "gpk1", 0x0c),
 	EXYNOS_PIN_BANK_EINTG(7, 0x080, "gpk2", 0x10),
@@ -170,6 +167,9 @@ static const struct samsung_pin_bank_data exynos3250_pin_banks1[] __initconst =
 	EXYNOS_PIN_BANK_EINTG(5, 0x2a0, "gpm2", 0x2c),
 	EXYNOS_PIN_BANK_EINTG(8, 0x2c0, "gpm3", 0x30),
 	EXYNOS_PIN_BANK_EINTG(8, 0x2e0, "gpm4", 0x34),
+	EXYNOS_PIN_BANK_EINTN(8, 0x120, "gpe0"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x140, "gpe1"),
+	EXYNOS_PIN_BANK_EINTN(3, 0x180, "gpe2"),
 	EXYNOS_PIN_BANK_EINTW(8, 0xc00, "gpx0", 0x00),
 	EXYNOS_PIN_BANK_EINTW(8, 0xc20, "gpx1", 0x04),
 	EXYNOS_PIN_BANK_EINTW(8, 0xc40, "gpx2", 0x08),
@@ -630,7 +630,6 @@ static const struct samsung_pin_bank_data exynos5410_pin_banks0[] __initconst =
 	EXYNOS_PIN_BANK_EINTG(4, 0x100, "gpc3", 0x20),
 	EXYNOS_PIN_BANK_EINTG(7, 0x120, "gpc1", 0x24),
 	EXYNOS_PIN_BANK_EINTG(7, 0x140, "gpc2", 0x28),
-	EXYNOS_PIN_BANK_EINTN(2, 0x160, "gpm5"),
 	EXYNOS_PIN_BANK_EINTG(8, 0x180, "gpd1", 0x2c),
 	EXYNOS_PIN_BANK_EINTG(8, 0x1A0, "gpe0", 0x30),
 	EXYNOS_PIN_BANK_EINTG(2, 0x1C0, "gpe1", 0x34),
@@ -641,6 +640,7 @@ static const struct samsung_pin_bank_data exynos5410_pin_banks0[] __initconst =
 	EXYNOS_PIN_BANK_EINTG(2, 0x260, "gpg2", 0x48),
 	EXYNOS_PIN_BANK_EINTG(4, 0x280, "gph0", 0x4c),
 	EXYNOS_PIN_BANK_EINTG(8, 0x2A0, "gph1", 0x50),
+	EXYNOS_PIN_BANK_EINTN(2, 0x160, "gpm5"),
 	EXYNOS_PIN_BANK_EINTN(8, 0x2C0, "gpm7"),
 	EXYNOS_PIN_BANK_EINTN(6, 0x2E0, "gpy0"),
 	EXYNOS_PIN_BANK_EINTN(4, 0x300, "gpy1"),
-- 
2.7.4

             reply	other threads:[~2018-04-08 18:11 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-08 18:07 Paweł Chmiel [this message]
2018-04-09  3:20 ` [PATCH] pinctrl/samsung: Correct EINTG banks order Tomasz Figa
2018-04-10  7:06 ` Krzysztof Kozlowski
2018-04-10  8:38   ` Tomasz Figa
2018-04-11  8:36     ` Tomasz Figa
2018-04-11  9:52       ` Krzysztof Kozlowski
2018-04-14 16:27         ` Paweł Chmiel

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