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From: Syed Nayyar Waris <syednwaris@gmail.com>
To: linus.walleij@linaro.org, akpm@linux-foundation.org
Cc: andriy.shevchenko@linux.intel.com, vilhelm.gray@gmail.com,
	michal.simek@xilinx.com, arnd@arndb.de, rrichter@marvell.com,
	linus.walleij@linaro.org, bgolaszewski@baylibre.com,
	yamada.masahiro@socionext.com, rui.zhang@intel.com,
	daniel.lezcano@linaro.org, amit.kucheria@verdurent.com,
	linux-arch@vger.kernel.org, linux-gpio@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org
Subject: [PATCH v2 2/2] gpio: xilinx: Add extra check if sum of widths exceed 64
Date: Sat, 12 Dec 2020 15:04:54 +0530	[thread overview]
Message-ID: <7049b151670d3cb3ca190185bb484a79b2d5d845.1607765148.git.syednwaris@gmail.com> (raw)
In-Reply-To: <cover.1607765147.git.syednwaris@gmail.com>

Add extra check to see if sum of widths does not exceed 64. If it
exceeds then return -EINVAL alongwith appropriate error message.

Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com>
---
 drivers/gpio/gpio-xilinx.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c
index 05dae086c4d0..a2e92a1cf50b 100644
--- a/drivers/gpio/gpio-xilinx.c
+++ b/drivers/gpio/gpio-xilinx.c
@@ -340,6 +340,12 @@ static int xgpio_probe(struct platform_device *pdev)
 
 	chip->gc.base = -1;
 	chip->gc.ngpio = chip->gpio_width[0] + chip->gpio_width[1];
+
+	if (chip->gc.ngpio > 64) {
+		dev_err(&pdev->dev, "invalid configuration: number of GPIO is greater than 64");
+		return -EINVAL;
+	}
+
 	chip->gc.parent = &pdev->dev;
 	chip->gc.direction_input = xgpio_dir_in;
 	chip->gc.direction_output = xgpio_dir_out;
-- 
2.29.0


WARNING: multiple messages have this Message-ID (diff)
From: Syed Nayyar Waris <syednwaris@gmail.com>
To: linus.walleij@linaro.org, akpm@linux-foundation.org
Cc: linux-arch@vger.kernel.org, amit.kucheria@verdurent.com,
	arnd@arndb.de, yamada.masahiro@socionext.com,
	linux-kernel@vger.kernel.org, linus.walleij@linaro.org,
	daniel.lezcano@linaro.org, vilhelm.gray@gmail.com,
	michal.simek@xilinx.com, bgolaszewski@baylibre.com,
	rrichter@marvell.com, linux-gpio@vger.kernel.org,
	linux-pm@vger.kernel.org, rui.zhang@intel.com,
	andriy.shevchenko@linux.intel.com,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 2/2] gpio: xilinx: Add extra check if sum of widths exceed 64
Date: Sat, 12 Dec 2020 15:04:54 +0530	[thread overview]
Message-ID: <7049b151670d3cb3ca190185bb484a79b2d5d845.1607765148.git.syednwaris@gmail.com> (raw)
In-Reply-To: <cover.1607765147.git.syednwaris@gmail.com>

Add extra check to see if sum of widths does not exceed 64. If it
exceeds then return -EINVAL alongwith appropriate error message.

Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com>
---
 drivers/gpio/gpio-xilinx.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c
index 05dae086c4d0..a2e92a1cf50b 100644
--- a/drivers/gpio/gpio-xilinx.c
+++ b/drivers/gpio/gpio-xilinx.c
@@ -340,6 +340,12 @@ static int xgpio_probe(struct platform_device *pdev)
 
 	chip->gc.base = -1;
 	chip->gc.ngpio = chip->gpio_width[0] + chip->gpio_width[1];
+
+	if (chip->gc.ngpio > 64) {
+		dev_err(&pdev->dev, "invalid configuration: number of GPIO is greater than 64");
+		return -EINVAL;
+	}
+
 	chip->gc.parent = &pdev->dev;
 	chip->gc.direction_input = xgpio_dir_in;
 	chip->gc.direction_output = xgpio_dir_out;
-- 
2.29.0


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  parent reply	other threads:[~2020-12-12 10:06 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-12  9:33 [PATCH v2 0/2] Modify bitmap_set_value() to suppress compiler warning Syed Nayyar Waris
2020-12-12  9:33 ` Syed Nayyar Waris
2020-12-12  9:34 ` [PATCH v2 1/2] bitmap: Modify bitmap_set_value() to check bitmap length Syed Nayyar Waris
2020-12-12  9:34   ` Syed Nayyar Waris
2020-12-12 15:56   ` kernel test robot
2020-12-12 17:05   ` kernel test robot
2020-12-13 14:55   ` Andy Shevchenko
2020-12-13 14:55     ` Andy Shevchenko
2020-12-12  9:34 ` Syed Nayyar Waris [this message]
2020-12-12  9:34   ` [PATCH v2 2/2] gpio: xilinx: Add extra check if sum of widths exceed 64 Syed Nayyar Waris

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