flash/nor/stm32xx: fix segfault accessing Cortex-M part number

[fw/openocd] / src / flash / nor / stm32h7x.c

diff --git a/src/flash/nor/stm32h7x.c b/src/flash/nor/stm32h7x.c
index d3f17b2b199aab0bbde460b0450c060c89836fd2..6d3149f9464dd1c9a813db3c19dc27d61d208e6b 100644 (file)
--- a/src/flash/nor/stm32h7x.c
+++ b/src/flash/nor/stm32h7x.c
@@ -759,7 +759,6 @@ static int stm32x_read_id_code(struct flash_bank *bank, uint32_t *id)
 static int stm32x_probe(struct flash_bank *bank)
 {
        struct target *target = bank->target;
-       struct cortex_m_common *cortex_m = target_to_cm(target);
        struct stm32h7x_flash_bank *stm32x_info = bank->driver_priv;
        uint16_t flash_size_in_kb;
        uint32_t device_id;
@@ -767,6 +766,11 @@ static int stm32x_probe(struct flash_bank *bank)
        stm32x_info->probed = false;
        stm32x_info->part_info = NULL;
 
+       if (!target_was_examined(target)) {
+               LOG_ERROR("Target not examined yet");
+               return ERROR_TARGET_NOT_EXAMINED;
+       }
+
        int retval = stm32x_read_id_code(bank, &stm32x_info->idcode);
        if (retval != ERROR_OK)
                return retval;
@@ -800,7 +804,8 @@ static int stm32x_probe(struct flash_bank *bank)
        /* get flash size from target */
        /* STM32H74x/H75x, the second core (Cortex-M4) cannot read the flash size */
        retval = ERROR_FAIL;
-       if (device_id == DEVID_STM32H74_H75XX && cortex_m->core_info->partno == CORTEX_M4_PARTNO)
+       if (device_id == DEVID_STM32H74_H75XX
+                       && cortex_m_get_partno_safe(target) == CORTEX_M4_PARTNO)
                LOG_WARNING("%s cannot read the flash size register", target_name(target));
        else
                retval = target_read_u16(target, stm32x_info->part_info->fsize_addr, &flash_size_in_kb);