rtc: opal: Fix OPAL RTC driver OPAL_BUSY loops

[mirror_ubuntu-bionic-kernel.git] / arch / powerpc / platforms / powernv / opal-rtc.c

diff --git a/arch/powerpc/platforms/powernv/opal-rtc.c b/arch/powerpc/platforms/powernv/opal-rtc.c
index f8868864f373ed5eecba333a5b1a2b83e38e0ec6..aa2a5139462ea5f6c81f51c8f025c9af84ce0be2 100644 (file)
--- a/arch/powerpc/platforms/powernv/opal-rtc.c
+++ b/arch/powerpc/platforms/powernv/opal-rtc.c
@@ -48,10 +48,12 @@ unsigned long __init opal_get_boot_time(void)
 
        while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
                rc = opal_rtc_read(&__y_m_d, &__h_m_s_ms);
-               if (rc == OPAL_BUSY_EVENT)
+               if (rc == OPAL_BUSY_EVENT) {
+                       mdelay(OPAL_BUSY_DELAY_MS);
                        opal_poll_events(NULL);
-               else if (rc == OPAL_BUSY)
-                       mdelay(10);
+               } else if (rc == OPAL_BUSY) {
+                       mdelay(OPAL_BUSY_DELAY_MS);
+               }
        }
        if (rc != OPAL_SUCCESS)
                return 0;