diff mbox series

[1/3] remoteproc/mediatek: fix boundary check

Message ID 20201113070207.836613-2-tzungbi@google.com (mailing list archive)
State New, archived
Headers show
Series remoteproc/mediatek: read IPI buffer offset from FW binary | expand

Commit Message

Tzung-Bi Shih Nov. 13, 2020, 7:02 a.m. UTC 
It is valid if offset+length == sram_size.

For example, sram_size=100, offset=99, length=1.  Accessing offset 99
with length 1 is valid.

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
---
 drivers/remoteproc/mtk_scp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 577cbd5d421e..7ba00305009a 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -408,11 +408,11 @@  static void *scp_da_to_va(struct rproc *rproc, u64 da, size_t len)
 
 	if (da < scp->sram_size) {
 		offset = da;
-		if (offset >= 0 && (offset + len) < scp->sram_size)
+		if (offset >= 0 && (offset + len) <= scp->sram_size)
 			return (void __force *)scp->sram_base + offset;
 	} else if (scp->dram_size) {
 		offset = da - scp->dma_addr;
-		if (offset >= 0 && (offset + len) < scp->dram_size)
+		if (offset >= 0 && (offset + len) <= scp->dram_size)
 			return (void __force *)scp->cpu_addr + offset;
 	}