Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d76c7438 authored by Phil Edworthy's avatar Phil Edworthy Committed by Greg Kroah-Hartman
Browse files

serial: 8250_dw: Fix runtime PM handling 



When using kgdb, you get an abort when accessing the UART registers.
This is because the driver has already entered runtime PM and so turned
off the bus clock needed to access the registers.

To fix this, set the capability indicating Runtime PM is active while idle.

Signed-off-by: default avatarPhil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 13dc04d0

drivers/tty/serial/8250/8250_dw.c

+4 −0
Original line number Diff line number Diff line
@@ -576,6 +576,10 @@ static int dw8250_probe(struct platform_device *pdev) 
	if (!data->skip_autocfg)

		dw8250_setup_port(p);



#ifdef CONFIG_PM

	uart.capabilities |= UART_CAP_RPM;

#endif



	/* If we have a valid fifosize, try hooking up DMA */

	if (p->fifosize) {

		data->dma.rxconf.src_maxburst = p->fifosize / 4;