[openwrt/openwrt] bmips: bcm6358: fix EHCI/OHCI kernel panics

[LEDE Commits]

noltari pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/09bbf5581713695cbf6bcb5791e9be02ff8c27fe

commit 09bbf5581713695cbf6bcb5791e9be02ff8c27fe
Author: Álvaro Fernández Rojas <noltari at gmail.com>
AuthorDate: Tue Feb 23 10:52:06 2021 +0100

    bmips: bcm6358: fix EHCI/OHCI kernel panics
    
    ARCH_HAS_SYNC_DMA_FOR_CPU_ALL is causing kernel panics when EHCI or OHCI are
    enabled.
    
    Signed-off-by: Álvaro Fernández Rojas <noltari at gmail.com>
---
 target/linux/bmips/dts/bcm6358-huawei-hg556a-b.dts |  8 +++
 ...ips-disable-ARCH_HAS_SYNC_DMA_FOR_CPU_ALL.patch | 62 ++++++++++++++++++++++
 2 files changed, 70 insertions(+)

diff --git a/target/linux/bmips/dts/bcm6358-huawei-hg556a-b.dts b/target/linux/bmips/dts/bcm6358-huawei-hg556a-b.dts
index 5b8709c722..f62c79fccb 100644
--- a/target/linux/bmips/dts/bcm6358-huawei-hg556a-b.dts
+++ b/target/linux/bmips/dts/bcm6358-huawei-hg556a-b.dts
@@ -126,6 +126,14 @@
 	};
 };
 
+&ehci {
+	status = "okay";
+};
+
+&ohci {
+	status = "okay";
+};
+
 &pflash {
 	status = "okay";
 
diff --git a/target/linux/bmips/patches-5.10/208-mips-bmips-disable-ARCH_HAS_SYNC_DMA_FOR_CPU_ALL.patch b/target/linux/bmips/patches-5.10/208-mips-bmips-disable-ARCH_HAS_SYNC_DMA_FOR_CPU_ALL.patch
new file mode 100644
index 0000000000..09b494197b
--- /dev/null
+++ b/target/linux/bmips/patches-5.10/208-mips-bmips-disable-ARCH_HAS_SYNC_DMA_FOR_CPU_ALL.patch
@@ -0,0 +1,62 @@
+From 84c06b4a1dfa3e021fdbcafaff8cebfdec462402 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari at gmail.com>
+Date: Tue, 23 Feb 2021 10:39:48 +0100
+Subject: [PATCH] mips: bmips: disable ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Enabling this option causes kernel panics on BCM6358 with EHCI/OHCI:
+[    3.881739] usb 1-1: new high-speed USB device number 2 using ehci-platform
+[    3.895011] Reserved instruction in kernel code[#1]:
+[    3.900113] CPU: 0 PID: 1 Comm: init Not tainted 5.10.16 #0
+[    3.905829] $ 0   : 00000000 10008700 00000000 77d94060
+[    3.911238] $ 4   : 7fd1f088 00000000 81431cac 81431ca0
+[    3.916641] $ 8   : 00000000 ffffefff 8075cd34 00000000
+[    3.922043] $12   : 806f8d40 f3e812b7 00000000 000d9aaa
+[    3.927446] $16   : 7fd1f068 7fd1f080 7ff559b8 81428470
+[    3.932848] $20   : 00000000 00000000 55590000 77d70000
+[    3.938251] $24   : 00000018 00000010
+[    3.943655] $28   : 81430000 81431e60 81431f28 800157fc
+[    3.949058] Hi    : 00000000
+[    3.952013] Lo    : 00000000
+[    3.955019] epc   : 80015808 setup_sigcontext+0x54/0x24c
+[    3.960464] ra    : 800157fc setup_sigcontext+0x48/0x24c
+[    3.965913] Status: 10008703	KERNEL EXL IE
+[    3.970216] Cause : 00800028 (ExcCode 0a)
+[    3.974340] PrId  : 0002a010 (Broadcom BMIPS4350)
+[    3.979170] Modules linked in: ohci_platform ohci_hcd fsl_mph_dr_of ehci_platform ehci_fsl ehci_hcd gpio_button_hotplug usbcore nls_base usb_common
+[    3.992907] Process init (pid: 1, threadinfo=(ptrval), task=(ptrval), tls=77e22ec8)
+[    4.000776] Stack : 81431ef4 7fd1f080 81431f28 81428470 7fd1f068 81431edc 7ff559b8 81428470
+[    4.009467]         81431f28 7fd1f080 55590000 77d70000 77d5498c 80015c70 806f0000 8063ae74
+[    4.018149]         08100002 81431f28 0000000a 08100002 81431f28 0000000a 77d6b418 00000003
+[    4.026831]         ffffffff 80016414 80080734 81431ecc 81431ecc 00000001 00000000 04000000
+[    4.035512]         77d54874 00000000 00000000 00000000 00000000 00000012 00000002 00000000
+[    4.044196]         ...
+[    4.046706] Call Trace:
+[    4.049238] [<80015808>] setup_sigcontext+0x54/0x24c
+[    4.054356] [<80015c70>] setup_frame+0xdc/0x124
+[    4.059015] [<80016414>] do_notify_resume+0x1dc/0x288
+[    4.064207] [<80011b50>] work_notifysig+0x10/0x18
+[    4.069036]
+[    4.070538] Code: 8fc300b4  00001025  26240008 <ac820000> ac830004  3c048063  0c0228aa  24846a00  26240010
+[    4.080686]
+[    4.082517] ---[ end trace 22a8edb41f5f983b ]---
+[    4.087374] Kernel panic - not syncing: Fatal exception
+[    4.092753] Rebooting in 1 seconds..
+
+Signed-off-by: Álvaro Fernández Rojas <noltari at gmail.com>
+---
+ arch/mips/Kconfig | 1 -
+ 1 file changed, 1 deletion(-)
+
+--- a/arch/mips/Kconfig
++++ b/arch/mips/Kconfig
+@@ -250,7 +250,6 @@ config ATH79
+ config BMIPS_GENERIC
+ 	bool "Broadcom Generic BMIPS kernel"
+ 	select ARCH_HAS_RESET_CONTROLLER
+-	select ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
+ 	select ARCH_HAS_PHYS_TO_DMA
+ 	select BOOT_RAW
+ 	select NO_EXCEPT_FILL