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Subject[patch] mxser: spin_lock() => spin_lock_irq()
This should be spin_lock_irq() to match the spin_unlock_irq().
Originally it was a lock_kernel() but we switched everything to
spin_lock_irq() last November.

Signed-off-by: Dan Carpenter <error27@gmail.com>

diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index e0c5d2a..ecb2d8b 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -1768,7 +1768,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
int len, lsr;

len = mxser_chars_in_buffer(tty);
- spin_lock(&info->slock);
+ spin_lock_irq(&info->slock);
lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
spin_unlock_irq(&info->slock);
len += (lsr ? 0 : 1);

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