commit a2d781fc8d9b16113dd9440107d73c0f21d7cbef
author Dmitry Torokhov <dmitry.torokhov@gmail.com> Wed Nov 19 17:02:24 2008 -0500
committer Dmitry Torokhov <dmitry.torokhov@gmail.com> Mon Nov 24 11:43:21 2008 -0500
tree a786cce33763680ae05bfbe310f845b127293157
parent 3eb1aa43ef5cb871ba3fb2f08633675eca374d2e

Input: libps2 - handle 0xfc responses from devices

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/serio/libps2.c

diff --git a/drivers/input/serio/libps2.c b/drivers/input/serio/libps2.c
index 2b304c2..67248c3 100644
--- a/drivers/input/serio/libps2.c
+++ b/drivers/input/serio/libps2.c
@@ -262,9 +262,17 @@
 			break;
 
 		case PS2_RET_NAK:
-			ps2dev->nak = 1;
+			ps2dev->flags |= PS2_FLAG_NAK;
+			ps2dev->nak = PS2_RET_NAK;
 			break;
 
+		case PS2_RET_ERR:
+			if (ps2dev->flags & PS2_FLAG_NAK) {
+				ps2dev->flags &= ~PS2_FLAG_NAK;
+				ps2dev->nak = PS2_RET_ERR;
+				break;
+			}
+
 		/*
 		 * Workaround for mice which don't ACK the Get ID command.
 		 * These are valid mouse IDs that we recognize.
@@ -282,8 +290,11 @@
 	}
 
 
-	if (!ps2dev->nak && ps2dev->cmdcnt)
-		ps2dev->flags |= PS2_FLAG_CMD | PS2_FLAG_CMD1;
+	if (!ps2dev->nak) {
+		ps2dev->flags &= ~PS2_FLAG_NAK;
+		if (ps2dev->cmdcnt)
+			ps2dev->flags |= PS2_FLAG_CMD | PS2_FLAG_CMD1;
+	}
 
 	ps2dev->flags &= ~PS2_FLAG_ACK;
 	wake_up(&ps2dev->wait);
@@ -329,6 +340,7 @@
 	if (ps2dev->flags & (PS2_FLAG_ACK | PS2_FLAG_CMD))
 		wake_up(&ps2dev->wait);
 
-	ps2dev->flags = 0;
+	/* reset all flags except last nack */
+	ps2dev->flags &= PS2_FLAG_NAK;
 }
 EXPORT_SYMBOL(ps2_cmd_aborted);