mtd: spi-nor: use local variable for struct device

Use a local variable for the struct device pointers to avoid
dereferencing.

Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Reviewed-by: Pratyush Yadav <pratyush@kernel.org>
Signed-off-by: Pratyush Yadav <pratyush@kernel.org>
Link: https://lore.kernel.org/r/20241111111946.9048-2-tudor.ambarus@linaro.org

Author: ambarus

drivers/mtd/spi-nor/core.c

@@ -3576,7 +3576,8 @@ static int spi_nor_create_write_dirmap(struct spi_nor *nor)
 static int spi_nor_probe(struct spi_mem *spimem)
 {
 	struct spi_device *spi = spimem->spi;
-	struct flash_platform_data *data = dev_get_platdata(&spi->dev);
+	struct device *dev = &spi->dev;
+	struct flash_platform_data *data = dev_get_platdata(dev);
 	struct spi_nor *nor;
 	/*
 	 * Enable all caps by default. The core will mask them after
@@ -3586,13 +3587,13 @@ static int spi_nor_probe(struct spi_mem *spimem)
 	char *flash_name;
 	int ret;
 
-	nor = devm_kzalloc(&spi->dev, sizeof(*nor), GFP_KERNEL);
+	nor = devm_kzalloc(dev, sizeof(*nor), GFP_KERNEL);
 	if (!nor)
 		return -ENOMEM;
 
 	nor->spimem = spimem;
-	nor->dev = &spi->dev;
-	spi_nor_set_flash_node(nor, spi->dev.of_node);
+	nor->dev = dev;
+	spi_nor_set_flash_node(nor, dev->of_node);
 
 	spi_mem_set_drvdata(spimem, nor);
 
@@ -3628,9 +3629,8 @@ static int spi_nor_probe(struct spi_mem *spimem)
 	 */
 	if (nor->params->page_size > PAGE_SIZE) {
 		nor->bouncebuf_size = nor->params->page_size;
-		devm_kfree(nor->dev, nor->bouncebuf);
-		nor->bouncebuf = devm_kmalloc(nor->dev,
-					      nor->bouncebuf_size,
+		devm_kfree(dev, nor->bouncebuf);
+		nor->bouncebuf = devm_kmalloc(dev, nor->bouncebuf_size,
 					      GFP_KERNEL);
 		if (!nor->bouncebuf)
 			return -ENOMEM;