Merging upstream version 6.9.8.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

2 files changed, 22 insertions, 11 deletions

diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index bb499e3629..1d0175d635 100644
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -225,6 +225,11 @@ static int davinci_gpio_probe(struct platform_device *pdev)
 	else
 		nirq = DIV_ROUND_UP(ngpio, 16);
 
+	if (nirq > MAX_INT_PER_BANK) {
+		dev_err(dev, "Too many IRQs!\n");
+		return -EINVAL;
+	}
+
 	chips = devm_kzalloc(dev, sizeof(*chips), GFP_KERNEL);
 	if (!chips)
 		return -ENOMEM;
diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c
index 9dad67ea25..5639abce6e 100644
--- a/drivers/gpio/gpiolib-cdev.c
+++ b/drivers/gpio/gpiolib-cdev.c
@@ -89,6 +89,10 @@ struct linehandle_state {
 	GPIOHANDLE_REQUEST_OPEN_DRAIN | \
 	GPIOHANDLE_REQUEST_OPEN_SOURCE)
 
+#define GPIOHANDLE_REQUEST_DIRECTION_FLAGS \
+	(GPIOHANDLE_REQUEST_INPUT | \
+	 GPIOHANDLE_REQUEST_OUTPUT)
+
 static int linehandle_validate_flags(u32 flags)
 {
 	/* Return an error if an unknown flag is set */
@@ -169,21 +173,21 @@ static long linehandle_set_config(struct linehandle_state *lh,
 	if (ret)
 		return ret;
 
+	/* Lines must be reconfigured explicitly as input or output. */
+	if (!(lflags & GPIOHANDLE_REQUEST_DIRECTION_FLAGS))
+		return -EINVAL;
+
 	for (i = 0; i < lh->num_descs; i++) {
 		desc = lh->descs[i];
-		linehandle_flags_to_desc_flags(gcnf.flags, &desc->flags);
+		linehandle_flags_to_desc_flags(lflags, &desc->flags);
 
-		/*
-		 * Lines have to be requested explicitly for input
-		 * or output, else the line will be treated "as is".
-		 */
 		if (lflags & GPIOHANDLE_REQUEST_OUTPUT) {
 			int val = !!gcnf.default_values[i];
 
 			ret = gpiod_direction_output(desc, val);
 			if (ret)
 				return ret;
-		} else if (lflags & GPIOHANDLE_REQUEST_INPUT) {
+		} else {
 			ret = gpiod_direction_input(desc);
 			if (ret)
 				return ret;
@@ -1530,12 +1534,14 @@ static long linereq_set_config(struct linereq *lr, void __user *ip)
 		line = &lr->lines[i];
 		desc = lr->lines[i].desc;
 		flags = gpio_v2_line_config_flags(&lc, i);
-		gpio_v2_line_config_flags_to_desc_flags(flags, &desc->flags);
-		edflags = flags & GPIO_V2_LINE_EDGE_DETECTOR_FLAGS;
 		/*
-		 * Lines have to be requested explicitly for input
-		 * or output, else the line will be treated "as is".
+		 * Lines not explicitly reconfigured as input or output
+		 * are left unchanged.
 		 */
+		if (!(flags & GPIO_V2_LINE_DIRECTION_FLAGS))
+			continue;
+		gpio_v2_line_config_flags_to_desc_flags(flags, &desc->flags);
+		edflags = flags & GPIO_V2_LINE_EDGE_DETECTOR_FLAGS;
 		if (flags & GPIO_V2_LINE_FLAG_OUTPUT) {
 			int val = gpio_v2_line_config_output_value(&lc, i);
 
@@ -1543,7 +1549,7 @@ static long linereq_set_config(struct linereq *lr, void __user *ip)
 			ret = gpiod_direction_output(desc, val);
 			if (ret)
 				return ret;
-		} else if (flags & GPIO_V2_LINE_FLAG_INPUT) {
+		} else {
 			ret = gpiod_direction_input(desc);
 			if (ret)
 				return ret;