Hi Philipp, On Tue, May 19, 2015 at 5:54 AM, Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> wrote: > The driver configures the IDLE condition to interrupt the SDMA engine. > Since the SDMA UART ROM script doesn't clear the IDLE bit itself, this > caused repeated 1-byte DMA transfers, regardless of available data in the > RX FIFO. Also, when returning due to the IDLE condition, the UART ROM > script already increased its counter, causing residue to be off by one. > > This patch clears the IDLE condition to avoid repeated 1-byte DMA transfers > and decreases count by when the DMA transfer was aborted due to the IDLE > condition, fixing serial transfers using DMA on i.MX6Q. > > Reported-by: Peter Seiderer <ps.report@xxxxxxx> > Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> Thanks for the fix. Tested on a imx6sl-warp, where I could not use DMA to access a Bluetooth device using the ROM SDMA firmware. Tested-by: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx> Could you please also Cc stable? Thanks -- 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
