board: update test on misc_read result in board_late_init

Update management of misc_read, which now return length of data
after the commit 8729b1ae2cbd ("misc: Update read() and write()
methods to return bytes xfered")

Fixes: 8b8b3d6b55b9 ("stm32mp1: board: add environment variable for board id and board rev")

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>

diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index 158a7d6..1d274c3 100644 (file)
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -686,7 +686,7 @@ int board_late_init(void)
        if (!ret)
                ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_BOARD),
                                &otp, sizeof(otp));
-       if (!ret && otp) {
+       if (ret > 0 && otp) {
                snprintf(buf, sizeof(buf), "0x%04x", otp >> 16);
                env_set("board_id", buf);