On Sun, May 14, 2017 at 02:35:15PM +0200, Peter Senna Tschudin wrote: > 18a4208 introduced a change to reduce the RX DMA latency on the first reception > when the serial port was opened for reading. However it was claiming a hardirq > unsafe lock after a hardirq safe lock which is not allowed and causes lockdep > to complain verbosely. > > This patch changes the code to always start RX DMA earlier, instead of > relying on the flags used to open the serial port removing the code that > was looking for the serial file flags. > > CC: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> > Signed-off-by: Peter Senna Tschudin <peter.senna@xxxxxxxxxxxxx> > --- > Tested on iMX53. Tested-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> (on an i.MX6) Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | -- 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
