From: Kisang Lee <kisang80.lee@xxxxxxxxxxx>
Pending UART irq may trigger spurious handling and may lead to
softlockup. This patch will fix following softlockup.
Signed-off-by: Kisang Lee <kisang80.lee@xxxxxxxxxxx>
Signed-off-by: Huisung Kang <hs1218.kang@xxxxxxxxxxx>
---
drivers/tty/serial/samsung.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index c55e5fb..9067299 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -425,15 +425,19 @@ static void s3c24xx_serial_shutdown(struct uart_port *port)
struct s3c24xx_uart_port *ourport = to_ourport(port);
if (ourport->tx_claimed) {
- if (!s3c24xx_serial_has_interrupt_mask(port))
+ if (!s3c24xx_serial_has_interrupt_mask(port)) {
+ disable_irq(ourport->tx_irq);
free_irq(ourport->tx_irq, ourport);
+ }
tx_enabled(port) = 0;
ourport->tx_claimed = 0;
}
if (ourport->rx_claimed) {
- if (!s3c24xx_serial_has_interrupt_mask(port))
+ if (!s3c24xx_serial_has_interrupt_mask(port)) {
+ disable_irq(ourport->rx_irq);
free_irq(ourport->rx_irq, ourport);
+ }
ourport->rx_claimed = 0;
rx_enabled(port) = 0;
}
--
1.7.1
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