diff options
| author | Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> | 2021-03-15 21:12:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-23 12:20:38 +0300 |
| commit | c69b11f3a6d1d205ad4da620baa93fe594aaed7f (patch) | |
| tree | 0e750839b2c436725b6fd9ee010392e3aa0dd869 /drivers/tty/serial/samsung_tty.c | |
| parent | 280def1e1c17d35b21206881937d4498bcc1f503 (diff) | |
| download | linux-c69b11f3a6d1d205ad4da620baa93fe594aaed7f.tar.xz | |
tty: serial: samsung_tty: remove spinlock flags in interrupt handlers
Since interrupt handler is called with disabled local interrupts, there
is no need to use the spinlock primitives disabling interrupts as well.
Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210315181212.113217-1-krzysztof.kozlowski@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/samsung_tty.c')
| -rw-r--r-- | drivers/tty/serial/samsung_tty.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index 80df842bf4c7..d9e4b67a12a0 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -715,13 +715,12 @@ static irqreturn_t s3c24xx_serial_rx_chars_dma(void *dev_id) struct s3c24xx_uart_dma *dma = ourport->dma; struct tty_struct *tty = tty_port_tty_get(&ourport->port.state->port); struct tty_port *t = &port->state->port; - unsigned long flags; struct dma_tx_state state; utrstat = rd_regl(port, S3C2410_UTRSTAT); rd_regl(port, S3C2410_UFSTAT); - spin_lock_irqsave(&port->lock, flags); + spin_lock(&port->lock); if (!(utrstat & S3C2410_UTRSTAT_TIMEOUT)) { s3c64xx_start_rx_dma(ourport); @@ -750,7 +749,7 @@ static irqreturn_t s3c24xx_serial_rx_chars_dma(void *dev_id) wr_regl(port, S3C2410_UTRSTAT, S3C2410_UTRSTAT_TIMEOUT); finish: - spin_unlock_irqrestore(&port->lock, flags); + spin_unlock(&port->lock); return IRQ_HANDLED; } @@ -846,11 +845,10 @@ static irqreturn_t s3c24xx_serial_rx_chars_pio(void *dev_id) { struct s3c24xx_uart_port *ourport = dev_id; struct uart_port *port = &ourport->port; - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); + spin_lock(&port->lock); s3c24xx_serial_rx_drain_fifo(ourport); - spin_unlock_irqrestore(&port->lock, flags); + spin_unlock(&port->lock); return IRQ_HANDLED; } @@ -934,13 +932,12 @@ static irqreturn_t s3c24xx_serial_tx_irq(int irq, void *id) { struct s3c24xx_uart_port *ourport = id; struct uart_port *port = &ourport->port; - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); + spin_lock(&port->lock); s3c24xx_serial_tx_chars(ourport); - spin_unlock_irqrestore(&port->lock, flags); + spin_unlock(&port->lock); return IRQ_HANDLED; } |