target/linux/bmips/patches-5.15/202-mips-bmips-disable-ARCH_HAS_SYNC_DMA_FOR_CPU_ALL.patch

   1 From 84c06b4a1dfa3e021fdbcafaff8cebfdec462402 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
   3 Date: Tue, 23 Feb 2021 10:39:48 +0100
   4 Subject: [PATCH] mips: bmips: disable ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 Enabling this option causes kernel panics on BCM6358 with EHCI/OHCI:
  10 [    3.881739] usb 1-1: new high-speed USB device number 2 using ehci-platform
  11 [    3.895011] Reserved instruction in kernel code[#1]:
  12 [    3.900113] CPU: 0 PID: 1 Comm: init Not tainted 5.10.16 #0
  13 [    3.905829] $ 0   : 00000000 10008700 00000000 77d94060
  14 [    3.911238] $ 4   : 7fd1f088 00000000 81431cac 81431ca0
  15 [    3.916641] $ 8   : 00000000 ffffefff 8075cd34 00000000
  16 [    3.922043] $12   : 806f8d40 f3e812b7 00000000 000d9aaa
  17 [    3.927446] $16   : 7fd1f068 7fd1f080 7ff559b8 81428470
  18 [    3.932848] $20   : 00000000 00000000 55590000 77d70000
  19 [    3.938251] $24   : 00000018 00000010
  20 [    3.943655] $28   : 81430000 81431e60 81431f28 800157fc
  21 [    3.949058] Hi    : 00000000
  22 [    3.952013] Lo    : 00000000
  23 [    3.955019] epc   : 80015808 setup_sigcontext+0x54/0x24c
  24 [    3.960464] ra    : 800157fc setup_sigcontext+0x48/0x24c
  25 [    3.965913] Status: 10008703 KERNEL EXL IE
  26 [    3.970216] Cause : 00800028 (ExcCode 0a)
  27 [    3.974340] PrId  : 0002a010 (Broadcom BMIPS4350)
  28 [    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
  29 [    3.992907] Process init (pid: 1, threadinfo=(ptrval), task=(ptrval), tls=77e22ec8)
  30 [    4.000776] Stack : 81431ef4 7fd1f080 81431f28 81428470 7fd1f068 81431edc 7ff559b8 81428470
  31 [    4.009467]         81431f28 7fd1f080 55590000 77d70000 77d5498c 80015c70 806f0000 8063ae74
  32 [    4.018149]         08100002 81431f28 0000000a 08100002 81431f28 0000000a 77d6b418 00000003
  33 [    4.026831]         ffffffff 80016414 80080734 81431ecc 81431ecc 00000001 00000000 04000000
  34 [    4.035512]         77d54874 00000000 00000000 00000000 00000000 00000012 00000002 00000000
  35 [    4.044196]         ...
  36 [    4.046706] Call Trace:
  37 [    4.049238] [<80015808>] setup_sigcontext+0x54/0x24c
  38 [    4.054356] [<80015c70>] setup_frame+0xdc/0x124
  39 [    4.059015] [<80016414>] do_notify_resume+0x1dc/0x288
  40 [    4.064207] [<80011b50>] work_notifysig+0x10/0x18
  41 [    4.069036]
  42 [    4.070538] Code: 8fc300b4  00001025  26240008 <ac820000> ac830004  3c048063  0c0228aa  24846a00  26240010
  43 [    4.080686]
  44 [    4.082517] ---[ end trace 22a8edb41f5f983b ]---
  45 [    4.087374] Kernel panic - not syncing: Fatal exception
  46 [    4.092753] Rebooting in 1 seconds..
  47
  48 Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
  49 ---
  50  arch/mips/Kconfig | 1 -
  51  1 file changed, 1 deletion(-)
  52
  53 --- a/arch/mips/Kconfig
  54 +++ b/arch/mips/Kconfig
  55 @@ -264,7 +264,6 @@ config ATH79
  56  config BMIPS_GENERIC
  57         bool "Broadcom Generic BMIPS kernel"
  58         select ARCH_HAS_RESET_CONTROLLER
  59 -       select ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
  60         select ARCH_HAS_PHYS_TO_DMA
  61         select BOOT_RAW
  62         select NO_EXCEPT_FILL
  63 --- a/arch/mips/bmips/dma.c
  64 +++ b/arch/mips/bmips/dma.c
  65 @@ -64,6 +64,7 @@ phys_addr_t dma_to_phys(struct device *d
  66         return dma_addr;
  67  }
  68
  69 +#ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
  70  void arch_sync_dma_for_cpu_all(void)
  71  {
  72         void __iomem *cbr = BMIPS_GET_CBR();
  73 @@ -79,6 +80,7 @@ void arch_sync_dma_for_cpu_all(void)
  74         __raw_writel(cfg | 0x100, cbr + BMIPS_RAC_CONFIG);
  75         __raw_readl(cbr + BMIPS_RAC_CONFIG);
  76  }
  77 +#endif /* CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL */
  78
  79  static int __init bmips_init_dma_ranges(void)
  80  {