drivers: flash: max32: Disable interrupts before accessing flash

Disable interrupts during flash operations to prevent unintended jumps.

Interrupts are now disabled before read, erase, and write operations to
avoid accidental jumps to other flash sections while working on a
specific section.

Signed-off-by: Tahsin Mutlugun <[email protected]>

Author: ttmut

drivers/flash/flash_max32.c

@@ -52,22 +52,35 @@ static inline void max32_sem_give(const struct device *dev)
 static int api_read(const struct device *dev, off_t address, void *buffer, size_t length)
 {
 	const struct max32_flash_dev_config *const cfg = dev->config;
+	unsigned int key = 0;
 
 	address += cfg->flash_base;
+
+	key = irq_lock();
+
 	MXC_FLC_Read(address, buffer, length);
+
+	irq_unlock(key);
+
 	return 0;
 }
 
 static int api_write(const struct device *dev, off_t address, const void *buffer, size_t length)
 {
 	const struct max32_flash_dev_config *const cfg = dev->config;
 	int ret = 0;
+	unsigned int key = 0;
 
 	max32_sem_take(dev);
 
 	address += cfg->flash_base;
+
+	key = irq_lock();
+
 	ret = MXC_FLC_Write(address, length, (uint32_t *)buffer);
 
+	irq_unlock(key);
+
 	max32_sem_give(dev);
 
 	return ret != 0 ? -EIO : 0;
@@ -79,9 +92,11 @@ static int api_erase(const struct device *dev, off_t start, size_t len)
 	uint32_t page_size = cfg->flash_erase_blk_sz;
 	uint32_t addr = (start + cfg->flash_base);
 	int ret = 0;
+	unsigned int key = 0;
 
 	max32_sem_take(dev);
 
+	key = irq_lock();
 	while (len) {
 		ret = MXC_FLC_PageErase(addr);
 		if (ret) {
@@ -95,6 +110,7 @@ static int api_erase(const struct device *dev, off_t start, size_t len)
 			len = 0;
 		}
 	}
+	irq_unlock(key);
 
 	max32_sem_give(dev);