[PATCH v2] dma-buf: heaps: use max3() in dma_heap_ioctl

[Thorsten Blum <thorsten.blum@linux.dev>]

Replace two nested max() calls with a single max3() in dma_heap_ioctl().

Reviewed-by: T.J. Mercier <tjmercier@google.com>
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
Changes in v2:
- Include minmax.h as suggested by T.J. Mercier
- v1: https://lore.kernel.org/lkml/20260427172519.417333-3-thorsten.blum@linux.dev/
---
 drivers/dma-buf/dma-heap.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c
index ac5f8685a649..d49188893608 100644
--- a/drivers/dma-buf/dma-heap.c
+++ b/drivers/dma-buf/dma-heap.c
@@ -13,6 +13,7 @@
 #include <linux/err.h>
 #include <linux/export.h>
 #include <linux/list.h>
+#include <linux/minmax.h>
 #include <linux/nospec.h>
 #include <linux/syscalls.h>
 #include <linux/uaccess.h>
@@ -153,7 +154,7 @@ static long dma_heap_ioctl(struct file *file, unsigned int ucmd,
 		in_size = 0;
 	if ((ucmd & kcmd & IOC_OUT) == 0)
 		out_size = 0;
-	ksize = max(max(in_size, out_size), drv_size);
+	ksize = max3(in_size, out_size, drv_size);
 
 	/* If necessary, allocate buffer for ioctl argument */
 	if (ksize > sizeof(stack_kdata)) {