Re: [PATCH] imx-serial: RX DMA startup latency

2017-05-17 Thread Sascha Hauer
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

Re: [PATCH] imx-serial: RX DMA startup latency

2017-05-17 Thread Sascha Hauer
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

[PATCH] imx-serial: RX DMA startup latency

2017-05-14 Thread Peter Senna Tschudin
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

[PATCH] imx-serial: RX DMA startup latency

2017-05-14 Thread Peter Senna Tschudin
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