diff options
| -rw-r--r-- | src/arch/x86/interface/pcbios/rtc_entropy.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/arch/x86/interface/pcbios/rtc_entropy.c b/src/arch/x86/interface/pcbios/rtc_entropy.c index e0c175685..c400d8a78 100644 --- a/src/arch/x86/interface/pcbios/rtc_entropy.c +++ b/src/arch/x86/interface/pcbios/rtc_entropy.c @@ -42,6 +42,9 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); /** Maximum time to wait for an RTC interrupt, in milliseconds */ #define RTC_MAX_WAIT_MS 100 +/** Number of RTC interrupts to check for */ +#define RTC_CHECK_COUNT 3 + /** RTC interrupt handler */ extern void rtc_isr ( void ); @@ -145,6 +148,7 @@ static void rtc_disable_int ( void ) { * @ret rc Return status code */ static int rtc_entropy_check ( void ) { + unsigned int count = 0; unsigned int i; /* Check that RTC interrupts are working */ @@ -158,14 +162,18 @@ static int rtc_entropy_check ( void ) { "cli\n\t" ); /* Check for RTC interrupt flag */ - if ( rtc_flag ) - return 0; + if ( rtc_flag ) { + rtc_flag = 0; + if ( ++count >= RTC_CHECK_COUNT ) + return 0; + } /* Delay */ mdelay ( 1 ); } - DBGC ( &rtc_flag, "RTC timed out waiting for interrupt\n" ); + DBGC ( &rtc_flag, "RTC timed out waiting for interrupt %d/%d\n", + ( count + 1 ), RTC_CHECK_COUNT ); return -ETIMEDOUT; } |