target/linux/brcm2708/patches-4.19/950-0414-dts-Increase-default-coherent-pool-size.patch

   1 From e13c663bfc75a628ba25afdf3f3b4a40a2c0250e Mon Sep 17 00:00:00 2001
   2 From: P33M <p33m@github.com>
   3 Date: Wed, 1 May 2019 15:00:05 +0100
   4 Subject: [PATCH] dts: Increase default coherent pool size
   5
   6 dwc_otg allocates DMA-coherent buffers in atomic context for misaligned
   7 transfer buffers. The pool that these allocations come from is set up
   8 at boot-time but can be overridden by a commandline parameter -
   9 increase this for now to prevent failures seen on 4.19 with multiple
  10 USB Ethernet devices.
  11
  12 see: https://github.com/raspberrypi/linux/issues/2924
  13 ---
  14  arch/arm/boot/dts/bcm270x.dtsi | 2 +-
  15  1 file changed, 1 insertion(+), 1 deletion(-)
  16
  17 --- a/arch/arm/boot/dts/bcm270x.dtsi
  18 +++ b/arch/arm/boot/dts/bcm270x.dtsi
  19 @@ -3,7 +3,7 @@
  20
  21  / {
  22         chosen {
  23 -               bootargs = "";
  24 +               bootargs = "coherent_pool=1M";
  25                 /delete-property/ stdout-path;
  26         };
  27