Note difficulties we had in OLDCARD using NEWCARD's methods of debouncing card event interrupts.

1 files changed, 6 insertions, 0 deletions

diff --git a/sys/dev/pccbb/pccbb.c b/sys/dev/pccbb/pccbb.c
index e914268..14513fb 100644
--- a/sys/dev/pccbb/pccbb.c
+++ b/sys/dev/pccbb/pccbb.c
@@ -700,6 +700,12 @@ pccbb_event_thread(void *arg)
 			 * Delay 1 second, make sure the user is done with
 			 * whatever he is doing.  We tsleep on sc->sc_flags,
 			 * which should never be woken up.
+			 *
+			 * XXX Note: This can cause problems on card
+			 * removal.  See OLDCARD's ISR for how you may
+			 * have to deal with the debouncing problem.  The
+			 * crux of the issue is interrupts delivered to
+			 * the card after eject are unstable.
 			 */
 			tsleep (&sc->sc_flags, PWAIT, "pccbbev", 1*hz);
 		}