ARM64: let 'end' point after the range in cache functions

v8_flush_dcache_range() and v8_inv_dcache_range() are implemented
under the assumption that their 'end' parameter points *after* the
range.

Fix callers to use it in this way.

This fixes e.g. spurious corruptions in the last octet when sending
129 bytes over ethernet.

Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
Link: https://lore.barebox.org/20240412162836.284671-1-enrico.scholz@sigma-chemnitz.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 3 insertions, 3 deletions

diff --git a/arch/arm/cpu/dma_64.c b/arch/arm/cpu/dma_64.c
index 74d7167860..b50572f5e6 100644
--- a/arch/arm/cpu/dma_64.c
+++ b/arch/arm/cpu/dma_64.c
@@ -6,7 +6,7 @@ void arch_sync_dma_for_device(void *vaddr, size_t size,
                               enum dma_data_direction dir)
 {
 	unsigned long start = (unsigned long)vaddr;
-	unsigned long end = start + size - 1;
+	unsigned long end = start + size;
 
 	if (dir == DMA_FROM_DEVICE)
 		v8_inv_dcache_range(start, end);
diff --git a/arch/arm/cpu/mmu_64.c b/arch/arm/cpu/mmu_64.c
index f907421da9..71c0d8930e 100644
--- a/arch/arm/cpu/mmu_64.c
+++ b/arch/arm/cpu/mmu_64.c
@@ -282,7 +282,7 @@ void mmu_disable(void)
 void dma_inv_range(void *ptr, size_t size)
 {
 	unsigned long start = (unsigned long)ptr;
-	unsigned long end = start + size - 1;
+	unsigned long end = start + size;
 
 	v8_inv_dcache_range(start, end);
 }
@@ -290,7 +290,7 @@ void dma_inv_range(void *ptr, size_t size)
 void dma_flush_range(void *ptr, size_t size)
 {
 	unsigned long start = (unsigned long)ptr;
-	unsigned long end = start + size - 1;
+	unsigned long end = start + size;
 
 	v8_flush_dcache_range(start, end);
 }