flash: nor: stm32l4x: fix warning in probe

Reading options word can fail, so this needs to be handled.

Reported by Clang static analyzer.

Change-Id: I9754cab9c4446fa2b20d4b44b0e20724d1bc1beb
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/4352
Tested-by: jenkins
Reviewed-by: Tim "mithro" Ansell <mithro@mithis.com>
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

diff --git a/src/flash/nor/stm32l4x.c b/src/flash/nor/stm32l4x.c
index fa0c48b4f5992b92567ddc9c1a9fb60f8414e598..6a1fa074e33da7fadc4214205314a4825825dcc3 100644 (file)
--- a/src/flash/nor/stm32l4x.c
+++ b/src/flash/nor/stm32l4x.c
@@ -652,6 +652,9 @@ static int stm32l4_probe(struct flash_bank *bank)
        /* get options to for DUAL BANK. */
        retval = target_read_u32(target, STM32_FLASH_OPTR, &options);
 
+       if (retval != ERROR_OK)
+               return retval;
+
        /* only devices with < 1024 kiB may be set to single bank dual banks */
        if ((flash_size_in_kb == 1024) || !(options & OPT_DUALBANK))
                stm32l4_info->option_bytes.bank_b_start = 256;