---

yaml --- r: 287057 b: refs/heads/master c: ef605fd h: refs/heads/master i: 287055: 260929a v: v3
git-mirror · Jan 25, 2012 · 5ddf27a · 5ddf27a
1 parent f184a29
commit 5ddf27a
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Showing 2 changed files with 15 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d8d8ffa477831b713ddfa2ad4d0ca545f3b567e5
+refs/heads/master: ef605fdb33883d687cff5ba75095a91b313b4966
diff --git a/trunk/drivers/tty/serial/amba-pl011.c b/trunk/drivers/tty/serial/amba-pl011.c
@@ -1751,9 +1751,19 @@ pl011_console_write(struct console *co, const char *s, unsigned int count)
 {
 	struct uart_amba_port *uap = amba_ports[co->index];
 	unsigned int status, old_cr, new_cr;
+	unsigned long flags;
+	int locked = 1;
 
 	clk_enable(uap->clk);
 
+	local_irq_save(flags);
+	if (uap->port.sysrq)
+		locked = 0;
+	else if (oops_in_progress)
+		locked = spin_trylock(&uap->port.lock);
+	else
+		spin_lock(&uap->port.lock);
+
 	/*
 	 *	First save the CR then disable the interrupts
 	 */
@@ -1773,6 +1783,10 @@ pl011_console_write(struct console *co, const char *s, unsigned int count)
 	} while (status & UART01x_FR_BUSY);
 	writew(old_cr, uap->port.membase + UART011_CR);
 
+	if (locked)
+		spin_unlock(&uap->port.lock);
+	local_irq_restore(flags);
+
 	clk_disable(uap->clk);
 }