blocklevel: smart_write: Deny writes intersecting ECC protected regions
Other code paths don't handle writes spanning mixed regions, and it's a
headache, so deny it here too.
@@ -512,6 +512,7 @@ int blocklevel_smart_write(struct blocklevel_device *bl, uint64_t pos, const voi
uint64_t ecc_start;
void *erase_buf;
int rc = 0;
+ int ecc_protection;
if (!buf || !bl) {
errno = EINVAL;
@@ -529,7 +530,14 @@ int blocklevel_smart_write(struct blocklevel_device *bl, uint64_t pos, const voi
if (rc)
return rc;
- if (ecc_protected(bl, pos, len, &ecc_start)) {
+ ecc_protection = ecc_protected(bl, pos, len, &ecc_start);
+ if (ecc_protection == -1) {
+ FL_ERR("%s: Can't cope with partial ecc\n", __func__);
+ errno = EINVAL;
+ return FLASH_ERR_PARM_ERROR;
+ }
+
+ if (ecc_protection) {
FL_DBG("%s: region has ECC\n", __func__);
len = ecc_buffer_size(len);
