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fusee: Fix race condition involving volatile reads

This commit is contained in:
Michael Scire 2018-12-07 14:27:46 -08:00
parent 00aa283a54
commit 4827fd71b4

View file

@ -226,9 +226,10 @@ void smmu_emulate_tsec(void *tsec_keys, const void *package1, size_t package1_si
uint32_t old_key_data = *key_data;
uint32_t buf_counter = 0;
while (!(tsec->FALCON_CPUCTL & 0x10)) {
if (*key_data != old_key_data) {
old_key_data = *key_data;
key_buf[buf_counter] = *key_data;
const uint32_t new_key_data = *key_data;
if (new_key_data != old_key_data) {
old_key_data = new_key_data;
key_buf[buf_counter] = new_key_data;
buf_counter++;
}
}