From: Jaikumar Ganesh <jaikumar@google.com>
Date: Tue, 14 Dec 2010 22:56:59 +0000 (-0800)
Subject: serial: tegra_hsuart: Call rx_done callback with lock held.
X-Git-Tag: firefly_0821_release~9834^2~243
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f45ad45201f7446d1138fc425947dce300f47131;p=firefly-linux-kernel-4.4.55.git

serial: tegra_hsuart: Call rx_done callback with lock held.

Similar to the exit_lpm callback which is called with the lock
held, call the rx_done callback with lock held.

Change-Id: I307d5191669ef6816d8406bb421b2c10c902f6a8
Signed-off-by: Jaikumar Ganesh <jaikumar@google.com>
---

diff --git a/drivers/serial/tegra_hsuart.c b/drivers/serial/tegra_hsuart.c
index b0d1b8de8712..54d9fa6e0bf5 100644
--- a/drivers/serial/tegra_hsuart.c
+++ b/drivers/serial/tegra_hsuart.c
@@ -312,9 +312,9 @@ static void tegra_rx_dma_complete_callback(struct tegra_dma_req *req)
 	spin_unlock(&u->lock);
 	tty_flip_buffer_push(u->state->port.tty);
 
+	spin_lock(&u->lock);
 	if (t->rx_done_cb)
 		t->rx_done_cb(u);
-	spin_lock(&u->lock);
 }
 
 /* Lock already taken */
@@ -532,9 +532,9 @@ static irqreturn_t tegra_uart_isr(int irq, void *data)
 
 				spin_unlock_irqrestore(&u->lock, flags);
 				tty_flip_buffer_push(u->state->port.tty);
+				spin_lock_irqsave(&u->lock, flags);
 				if (t->rx_done_cb)
 					t->rx_done_cb(u);
-				spin_lock_irqsave(&u->lock, flags);
 			}
 			break;
 		case 3: /* Receive error */