On Fri, Apr 27, 2018 at 11:05:44AM +0100, Dave Martin wrote: > This is an update to a previous RFC [1], to fix a problem observed by > the qemu community that causes serial input to hang when booting a > simulated system with data already queued in the UART FIFO [2]. > > This patch could cause problems for people that are actually relying > on chars queued in the PL011 RX FIFO during boot or while the UART is > closed. There are no guarantees about such things working in general. > In either case, there is no protection against RX FIFO overflow or > reprogramming of the UART parameters while Linux is not actively > receiving chars. > > Cheers > ---Dave > > [1] [RFC PATCH v4] tty: pl011: Avoid spuriously stuck-off interrupts > http://lists.infradead.org/pipermail/linux-arm-kernel/2018-April/574033.html > > [2] [Qemu-devel] [Qemu-arm] [PATCH] pl011: do not put into fifo > before enabled the interruption > https://lists.gnu.org/archive/html/qemu-devel/2018-01/msg06446.html > > Dave Martin (1): > tty: pl011: Avoid spuriously stuck-off interrupts > > drivers/tty/serial/amba-pl011.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > -- > 2.1.4 There is no patch here, did something go wrong? You do not need a "cover letter" for a single patch... thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
