[PATCH 09/11] serial: stm32: fix spin_lock management
From: Alexandre TORGUE <hidden>
Date: 2016-09-15 16:42:41
Also in:
linux-devicetree, linux-serial
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
Signed-off-by: Gerald Baeza <redacted> Signed-off-by: Alexandre TORGUE <redacted>
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index 24c4d82..3b99d79 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c@@ -321,6 +321,8 @@ static irqreturn_t stm32_interrupt(int irq, void *ptr) struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; u32 sr; + spin_lock(&port->lock); + sr = readl_relaxed(port->membase + ofs->isr); if ((sr & USART_SR_RXNE) && !(stm32_port->rx_ch))
@@ -329,6 +331,8 @@ static irqreturn_t stm32_interrupt(int irq, void *ptr) if ((sr & USART_SR_TXE) && !(stm32_port->tx_ch)) stm32_transmit_chars(port); + spin_unlock(&port->lock); + if (stm32_port->rx_ch) return IRQ_WAKE_THREAD; else
--
1.9.1