From 23a6584975f29ca1a23e60f4ea09c382693d3693 Mon Sep 17 00:00:00 2001 From: P33M Date: Wed, 1 May 2019 15:00:05 +0100 Subject: [PATCH] dts: Increase default coherent pool size dwc_otg allocates DMA-coherent buffers in atomic context for misaligned transfer buffers. The pool that these allocations come from is set up at boot-time but can be overridden by a commandline parameter - increase this for now to prevent failures seen on 4.19 with multiple USB Ethernet devices. see: https://github.com/raspberrypi/linux/issues/2924 --- arch/arm/boot/dts/bcm270x.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/bcm270x.dtsi b/arch/arm/boot/dts/bcm270x.dtsi index 55a03c0d5e1c5..ecdb36e69c873 100644 --- a/arch/arm/boot/dts/bcm270x.dtsi +++ b/arch/arm/boot/dts/bcm270x.dtsi @@ -3,7 +3,7 @@ / { chosen { - bootargs = ""; + bootargs = "coherent_pool=1M"; /delete-property/ stdout-path; }; From 591bd5452ad361deedc19d21d3f98bf1eab623ca Mon Sep 17 00:00:00 2001 From: Phil Elwell Date: Thu, 2 May 2019 22:14:34 +0100 Subject: [PATCH] BCM270X_DT: Also set coherent_pool=1M for BT Pis See: https://github.com/raspberrypi/linux/issues/2924 Signed-off-by: Phil Elwell --- arch/arm/boot/dts/bcm2708-rpi-0-w.dts | 2 +- arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts | 2 +- arch/arm/boot/dts/bcm2710-rpi-3-b.dts | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm/boot/dts/bcm2708-rpi-0-w.dts b/arch/arm/boot/dts/bcm2708-rpi-0-w.dts index 68316404aab22..aa33646fcf531 100644 --- a/arch/arm/boot/dts/bcm2708-rpi-0-w.dts +++ b/arch/arm/boot/dts/bcm2708-rpi-0-w.dts @@ -8,7 +8,7 @@ model = "Raspberry Pi Zero W"; chosen { - bootargs = "8250.nr_uarts=1"; + bootargs = "coherent_pool=1M 8250.nr_uarts=1"; }; aliases { diff --git a/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts b/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts index 898ab48479e32..b5f125296e1e9 100644 --- a/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts +++ b/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts @@ -9,7 +9,7 @@ model = "Raspberry Pi 3 Model B+"; chosen { - bootargs = "8250.nr_uarts=1"; + bootargs = "coherent_pool=1M 8250.nr_uarts=1"; }; aliases { diff --git a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts index 61ecb46b9c060..d9d9505c66932 100644 --- a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts +++ b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts @@ -9,7 +9,7 @@ model = "Raspberry Pi 3 Model B"; chosen { - bootargs = "8250.nr_uarts=1"; + bootargs = "coherent_pool=1M 8250.nr_uarts=1"; }; aliases {