From: Huibin Hong <huibin.hong@rock-chips.com>
Date: Thu, 19 Jan 2017 02:12:23 +0000 (+0800)
Subject: fiq_debugger: Switch current cpu when the former cpu is offline
X-Git-Tag: firefly_0821_release~702
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=89764582fb129c0a7f1973dadd75d118cacb0ac3;p=firefly-linux-kernel-4.4.55.git

fiq_debugger: Switch current cpu when the former cpu is offline

Change-Id: Ie1a5fe5c3496e5182f0f9aaab336a4d0ff683dfa
Signed-off-by: Huibin Hong <huibin.hong@rock-chips.com>
---

diff --git a/drivers/staging/android/fiq_debugger/fiq_debugger.c b/drivers/staging/android/fiq_debugger/fiq_debugger.c
index 8a63290e5a9f..c9a38705f3ad 100644
--- a/drivers/staging/android/fiq_debugger/fiq_debugger.c
+++ b/drivers/staging/android/fiq_debugger/fiq_debugger.c
@@ -647,7 +647,7 @@ static bool fiq_debugger_handle_uart_interrupt(struct fiq_debugger_state *state,
 	int count = 0;
 	bool signal_helper = false;
 
-	if (this_cpu != state->current_cpu) {
+	if ((this_cpu != state->current_cpu) && (cpu_online(state->current_cpu))) {
 		if (state->in_fiq)
 			return false;
 
@@ -665,6 +665,9 @@ static bool fiq_debugger_handle_uart_interrupt(struct fiq_debugger_state *state,
 		return false;
 	}
 
+	if (this_cpu != state->current_cpu)
+		state->current_cpu = this_cpu;
+
 	state->in_fiq = true;
 
 	while ((c = fiq_debugger_getc(state)) != FIQ_DEBUGGER_NO_CHAR) {