Currently, AUTOBOOT_KEYED and its variant AUTOBOOT_ENCRYPTION are broken when one has an external always-running watchdog device with a timeout shorter than the configured boot delay (in my case, I have a gpio-wdt one with a timeout of 1 second), because we fail to call WATCHDOG_RESET() in the loops where we wait for the bootdelay to elapse.
This is done implicitly in the !AUTOBOOT_KEYED case, i.e. abortboot_single_key(), because that loop contains a udelay(10000), and udelay() does a WATCHDOG_RESET().
To fix this, simply add similar udelay() calls in the other loops.
Signed-off-by: Rasmus Villemoes rasmus.villemoes@prevas.dk --- common/autoboot.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/common/autoboot.c b/common/autoboot.c index 63f2587941..cdafe76309 100644 --- a/common/autoboot.c +++ b/common/autoboot.c @@ -115,6 +115,7 @@ static int passwd_abort_crypt(uint64_t etime) presskey_len++; } } + udelay(10000); } while (never_timeout || get_ticks() <= etime);
return abort; @@ -206,6 +207,7 @@ static int passwd_abort_sha256(uint64_t etime) if (slow_equals(sha, sha_env, SHA256_SUM_LEN)) abort = 1; } + udelay(10000); } while (!abort && get_ticks() <= etime);
free(presskey); @@ -293,6 +295,7 @@ static int passwd_abort_key(uint64_t etime) abort = 1; } } + udelay(10000); } while (!abort && get_ticks() <= etime);
return abort;