Commit a3cf3f80 authored by Artur Tynecki's avatar Artur Tynecki Committed by David Brown
Browse files

mbed: Fix calling to BlockDevice::size before initialization

These changes fixes a bug that can cause an uninitialized BlockDevice
to be queried for its size. In some cases, this can return unexpected
results (eg: 0). Move setting block device size after its
Co-created: @AGlass0fMilk - George Beckstein

Signed-off-by: default avatarArtur Tynecki <>
Signed-off-by: default avatarGeorge Beckstein <>
parent 6822365e
......@@ -91,15 +91,22 @@ int flash_area_open(uint8_t id, const struct flash_area** fapp) {
fap->fa_device_id = 0; // not relevant
mbed::BlockDevice* bd = flash_map_bd[id];
fap->fa_size = (uint32_t) bd->size();
/* Only initialize if this isn't a nested call to open the flash area */
if (open_count[id] == 1) {
MCUBOOT_LOG_DBG("initializing flash area %d...", id);
return bd->init();
int ret = bd->init();
if (ret)
MCUBOOT_LOG_ERR("initializing flash area failed %d", ret);
return ret;
} else {
return 0;
fap->fa_size = (uint32_t) bd->size();
return 0;
void flash_area_close(const struct flash_area* fap) {
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