From patchwork Sat Apr 18 19:32:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Atish Patra X-Patchwork-Id: 237985 List-Id: U-Boot discussion From: atish.patra at wdc.com (Atish Patra) Date: Sat, 18 Apr 2020 12:32:24 -0700 Subject: [PATCH v6 2/6] fdtdec: Fix boundary check In-Reply-To: <20200418193228.44209-1-atish.patra@wdc.com> References: <20200418193228.44209-1-atish.patra@wdc.com> Message-ID: <20200418193228.44209-3-atish.patra@wdc.com> In U-Boot, the reserved memory end address is considered as a inclusive address. This notion is followed while adding a reserved memory node to the DT. For example: end_address = start_address + size - 1 Follow the same notion and fix the end address computation while checking for existing nodes. Signed-off-by: Atish Patra Reviewed-by: Bin Meng Tested-by: Bin Meng --- lib/fdtdec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/lib/fdtdec.c b/lib/fdtdec.c index eb11fc898e30..07ba9f5c97e9 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -1311,7 +1311,8 @@ int fdtdec_add_reserved_memory(void *blob, const char *basename, continue; } - if (addr == carveout->start && (addr + size) == carveout->end) { + if (addr == carveout->start && (addr + size - 1) == + carveout->end) { if (phandlep) *phandlep = fdt_get_phandle(blob, node); return 0;