From 1f100b323d19469b06a63ccd6130ed71760145cc Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@linux.intel.com>
Date: Mon, 30 Nov 2009 13:16:30 +0000
Subject: [PATCH] tty: sdio_uart: Fix the locking on "func" for new code
The new dtr_rts function didn't take the port->func lock as it should
so add use of the lock there.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/mmc/card/sdio_uart.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/mmc/card/sdio_uart.c b/drivers/mmc/card/sdio_uart.c
index 2a13db54ffc4..f53755533e7e 100644
--- a/drivers/mmc/card/sdio_uart.c
+++ b/drivers/mmc/card/sdio_uart.c
@@ -603,10 +603,14 @@ static void uart_dtr_rts(struct tty_port *tport, int onoff)
{
struct sdio_uart_port *port =
container_of(tport, struct sdio_uart_port, port);
+ int ret = sdio_uart_claim_func(port);
+ if (ret)
+ return;
if (onoff == 0)
sdio_uart_clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
else
sdio_uart_set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
+ sdio_uart_release_func(port);
}
/**
--
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