Commit c974991d authored by jun qian's avatar jun qian Committed by Greg Kroah-Hartman

tty:serial:imx: use spin_lock instead of spin_lock_irqsave in isr

Before the program enters the uart ISR, the local interrupt has been
disabled by the system, so it's not appropriate to use spin_lock_irqsave
interface in the ISR.
Signed-off-by: default avatarjun qian <hangdianqj@163.com>
Reviewed-by: default avatarBarry Song <21cnbao@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent deeb33e8
......@@ -706,27 +706,25 @@ static irqreturn_t imx_uart_rtsint(int irq, void *dev_id)
{
struct imx_port *sport = dev_id;
u32 usr1;
unsigned long flags;
spin_lock_irqsave(&sport->port.lock, flags);
spin_lock(&sport->port.lock);
imx_uart_writel(sport, USR1_RTSD, USR1);
usr1 = imx_uart_readl(sport, USR1) & USR1_RTSS;
uart_handle_cts_change(&sport->port, !!usr1);
wake_up_interruptible(&sport->port.state->port.delta_msr_wait);
spin_unlock_irqrestore(&sport->port.lock, flags);
spin_unlock(&sport->port.lock);
return IRQ_HANDLED;
}
static irqreturn_t imx_uart_txint(int irq, void *dev_id)
{
struct imx_port *sport = dev_id;
unsigned long flags;
spin_lock_irqsave(&sport->port.lock, flags);
spin_lock(&sport->port.lock);
imx_uart_transmit_buffer(sport);
spin_unlock_irqrestore(&sport->port.lock, flags);
spin_unlock(&sport->port.lock);
return IRQ_HANDLED;
}
......@@ -735,9 +733,8 @@ static irqreturn_t imx_uart_rxint(int irq, void *dev_id)
struct imx_port *sport = dev_id;
unsigned int rx, flg, ignored = 0;
struct tty_port *port = &sport->port.state->port;
unsigned long flags;
spin_lock_irqsave(&sport->port.lock, flags);
spin_lock(&sport->port.lock);
while (imx_uart_readl(sport, USR2) & USR2_RDR) {
u32 usr2;
......@@ -797,7 +794,7 @@ static irqreturn_t imx_uart_rxint(int irq, void *dev_id)
}
out:
spin_unlock_irqrestore(&sport->port.lock, flags);
spin_unlock(&sport->port.lock);
tty_flip_buffer_push(port);
return IRQ_HANDLED;
}
......@@ -903,13 +900,11 @@ static irqreturn_t imx_uart_int(int irq, void *dev_id)
}
if (usr1 & USR1_DTRD) {
unsigned long flags;
imx_uart_writel(sport, USR1_DTRD, USR1);
spin_lock_irqsave(&sport->port.lock, flags);
spin_lock(&sport->port.lock);
imx_uart_mctrl_check(sport);
spin_unlock_irqrestore(&sport->port.lock, flags);
spin_unlock(&sport->port.lock);
ret = IRQ_HANDLED;
}
......
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