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arch: cxd56xx: Fix critical section in serial transmission

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Fix an issue that the serial transmission buffers are corrupted because
serial transmission are not protected by critical section in non-smp mode.
This commit is contained in:
SPRESENSE 2022-03-16 15:32:36 +09:00 committed by Masayuki Ishikawa
parent bbf12f3b1b
commit c05ace557f
1 changed files with 4 additions and 0 deletions
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4
arch/arm/src/cxd56xx/cxd56_serial.c
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@ -1001,9 +1001,13 @@ static void up_txint(FAR struct uart_dev_s *dev, bool enable)
* interrupts disabled (note this may recurse). * interrupts disabled (note this may recurse).
*/ */
# ifdef CONFIG_SMP
spin_unlock_irqrestore(&priv->lock, flags); spin_unlock_irqrestore(&priv->lock, flags);
# endif
uart_xmitchars(dev); uart_xmitchars(dev);
# ifdef CONFIG_SMP
flags = spin_lock_irqsave(&priv->lock); flags = spin_lock_irqsave(&priv->lock);
# endif
#endif #endif
} }
else else