When console and printk log are printed at the same time, they are called through tty driver and console driver concurrently. In this case, this could lead to potintial issue that data loss or fifo full. This issue also occurred with other drivers and has been fixed. "serial: amba-pl011: lock console writes against interrupts" - https://lkml.org/lkml/2012/2/1/495 --- Changes since v2: - value of lock is chanaged to true/false Changes since v1: - locked variable type changed bool from int - spin_lock() changed to spin_lock_irqsave() Jaewon Kim (1): tty: serial: samsung: add spin_lock for interrupt and console_write drivers/tty/serial/samsung_tty.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) -- 2.35.1
