Commit 01d32d71 authored by Alexandre TORGUE's avatar Alexandre TORGUE Committed by Greg Kroah-Hartman

serial: stm32: fix spin_lock management

Signed-off-by: default avatarGerald Baeza <gerald.baeza@st.com>
Signed-off-by: default avatarAlexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 34891872
...@@ -321,6 +321,8 @@ static irqreturn_t stm32_interrupt(int irq, void *ptr) ...@@ -321,6 +321,8 @@ static irqreturn_t stm32_interrupt(int irq, void *ptr)
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
u32 sr; u32 sr;
spin_lock(&port->lock);
sr = readl_relaxed(port->membase + ofs->isr); sr = readl_relaxed(port->membase + ofs->isr);
if ((sr & USART_SR_RXNE) && !(stm32_port->rx_ch)) if ((sr & USART_SR_RXNE) && !(stm32_port->rx_ch))
...@@ -329,6 +331,8 @@ static irqreturn_t stm32_interrupt(int irq, void *ptr) ...@@ -329,6 +331,8 @@ static irqreturn_t stm32_interrupt(int irq, void *ptr)
if ((sr & USART_SR_TXE) && !(stm32_port->tx_ch)) if ((sr & USART_SR_TXE) && !(stm32_port->tx_ch))
stm32_transmit_chars(port); stm32_transmit_chars(port);
spin_unlock(&port->lock);
if (stm32_port->rx_ch) if (stm32_port->rx_ch)
return IRQ_WAKE_THREAD; return IRQ_WAKE_THREAD;
else else
......
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