target/linux/brcm63xx/patches-4.19/001-4.22-01-MIPS-BCM63XX-drop-unused-and-broken-DSP-platform-dev.patch

   1 From 51559154375fff4a94bbbc249fdd9248a80827b3 Mon Sep 17 00:00:00 2001
   2 From: Jonas Gorski <jonas.gorski@gmail.com>
   3 Date: Tue, 18 Dec 2018 10:19:02 +0100
   4 Subject: [PATCH] MIPS: BCM63XX: drop unused and broken DSP platform device
   5
   6 Trying to register the DSP platform device results in a null pointer
   7 access:
   8
   9 [    0.124184] CPU 0 Unable to handle kernel paging request at virtual address 00000000, epc == 804e305c, ra == 804e6f20
  10 [    0.135208] Oops[#1]:
  11 [    0.137514] CPU: 0 PID: 1 Comm: swapper Not tainted 4.14.87
  12 ...
  13 [    0.197117] epc   : 804e305c bcm63xx_dsp_register+0x80/0xa4
  14 [    0.202838] ra    : 804e6f20 board_register_devices+0x258/0x390
  15 ...
  16
  17 This happens because it tries to copy the passed platform data over the
  18 platform_device's unpopulated platform_data.
  19
  20 Since this code has been broken since its submission, no driver was ever
  21 submitted for it, and apparently nobody was using it, just remove it
  22 instead of trying to fix it.
  23
  24 Fixes: e7300d04bd08 ("MIPS: BCM63xx: Add support for the Broadcom BCM63xx family of SOCs.")
  25 Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
  26 ---
  27  arch/mips/bcm63xx/Makefile                         |  6 +--
  28  arch/mips/bcm63xx/boards/board_bcm963xx.c          | 20 --------
  29  arch/mips/bcm63xx/dev-dsp.c                        | 56 ----------------------
  30  .../include/asm/mach-bcm63xx/bcm63xx_dev_dsp.h     | 14 ------
  31  .../mips/include/asm/mach-bcm63xx/board_bcm963xx.h |  5 --
  32  5 files changed, 3 insertions(+), 98 deletions(-)
  33  delete mode 100644 arch/mips/bcm63xx/dev-dsp.c
  34  delete mode 100644 arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_dsp.h
  35
  36 --- a/arch/mips/bcm63xx/Makefile
  37 +++ b/arch/mips/bcm63xx/Makefile
  38 @@ -1,8 +1,8 @@
  39  # SPDX-License-Identifier: GPL-2.0
  40  obj-y          += clk.o cpu.o cs.o gpio.o irq.o nvram.o prom.o reset.o \
  41 -                  setup.o timer.o dev-dsp.o dev-enet.o dev-flash.o \
  42 -                  dev-pcmcia.o dev-rng.o dev-spi.o dev-hsspi.o dev-uart.o \
  43 -                  dev-wdt.o dev-usb-usbd.o
  44 +                  setup.o timer.o dev-enet.o dev-flash.o dev-pcmcia.o \
  45 +                  dev-rng.o dev-spi.o dev-hsspi.o dev-uart.o dev-wdt.o \
  46 +                  dev-usb-usbd.o
  47  obj-$(CONFIG_EARLY_PRINTK)     += early_printk.o
  48
  49  obj-y          += boards/
  50 --- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
  51 +++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
  52 @@ -23,7 +23,6 @@
  53  #include <bcm63xx_nvram.h>
  54  #include <bcm63xx_dev_pci.h>
  55  #include <bcm63xx_dev_enet.h>
  56 -#include <bcm63xx_dev_dsp.h>
  57  #include <bcm63xx_dev_flash.h>
  58  #include <bcm63xx_dev_hsspi.h>
  59  #include <bcm63xx_dev_pcmcia.h>
  60 @@ -289,14 +288,6 @@ static struct board_info __initdata boar
  61         .has_pccard                     = 1,
  62         .has_ehci0                      = 1,
  63
  64 -       .has_dsp                        = 1,
  65 -       .dsp = {
  66 -               .gpio_rst               = 6,
  67 -               .gpio_int               = 34,
  68 -               .cs                     = 2,
  69 -               .ext_irq                = 2,
  70 -       },
  71 -
  72         .leds = {
  73                 {
  74                         .name           = "adsl-fail",
  75 @@ -401,14 +392,6 @@ static struct board_info __initdata boar
  76
  77         .has_ohci0 = 1,
  78
  79 -       .has_dsp                        = 1,
  80 -       .dsp = {
  81 -               .gpio_rst               = 6,
  82 -               .gpio_int               = 34,
  83 -               .ext_irq                = 2,
  84 -               .cs                     = 2,
  85 -       },
  86 -
  87         .leds = {
  88                 {
  89                         .name           = "adsl-fail",
  90 @@ -898,9 +881,6 @@ int __init board_register_devices(void)
  91         if (board.has_usbd)
  92                 bcm63xx_usbd_register(&board.usbd);
  93
  94 -       if (board.has_dsp)
  95 -               bcm63xx_dsp_register(&board.dsp);
  96 -
  97         /* Generate MAC address for WLAN and register our SPROM,
  98          * do this after registering enet devices
  99          */
 100 --- a/arch/mips/bcm63xx/dev-dsp.c
 101 +++ /dev/null
 102 @@ -1,56 +0,0 @@
 103 -/*
 104 - * Broadcom BCM63xx VoIP DSP registration
 105 - *
 106 - * This file is subject to the terms and conditions of the GNU General Public
 107 - * License.  See the file "COPYING" in the main directory of this archive
 108 - * for more details.
 109 - *
 110 - * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org>
 111 - */
 112 -
 113 -#include <linux/init.h>
 114 -#include <linux/kernel.h>
 115 -#include <linux/platform_device.h>
 116 -
 117 -#include <bcm63xx_cpu.h>
 118 -#include <bcm63xx_dev_dsp.h>
 119 -#include <bcm63xx_regs.h>
 120 -#include <bcm63xx_io.h>
 121 -
 122 -static struct resource voip_dsp_resources[] = {
 123 -       {
 124 -               .start          = -1, /* filled at runtime */
 125 -               .end            = -1, /* filled at runtime */
 126 -               .flags          = IORESOURCE_MEM,
 127 -       },
 128 -       {
 129 -               .start          = -1, /* filled at runtime */
 130 -               .flags          = IORESOURCE_IRQ,
 131 -       },
 132 -};
 133 -
 134 -static struct platform_device bcm63xx_voip_dsp_device = {
 135 -       .name           = "bcm63xx-voip-dsp",
 136 -       .id             = -1,
 137 -       .num_resources  = ARRAY_SIZE(voip_dsp_resources),
 138 -       .resource       = voip_dsp_resources,
 139 -};
 140 -
 141 -int __init bcm63xx_dsp_register(const struct bcm63xx_dsp_platform_data *pd)
 142 -{
 143 -       struct bcm63xx_dsp_platform_data *dpd;
 144 -       u32 val;
 145 -
 146 -       /* Get the memory window */
 147 -       val = bcm_mpi_readl(MPI_CSBASE_REG(pd->cs - 1));
 148 -       val &= MPI_CSBASE_BASE_MASK;
 149 -       voip_dsp_resources[0].start = val;
 150 -       voip_dsp_resources[0].end = val + 0xFFFFFFF;
 151 -       voip_dsp_resources[1].start = pd->ext_irq;
 152 -
 153 -       /* copy given platform data */
 154 -       dpd = bcm63xx_voip_dsp_device.dev.platform_data;
 155 -       memcpy(dpd, pd, sizeof (*pd));
 156 -
 157 -       return platform_device_register(&bcm63xx_voip_dsp_device);
 158 -}
 159 --- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_dsp.h
 160 +++ /dev/null
 161 @@ -1,14 +0,0 @@
 162 -/* SPDX-License-Identifier: GPL-2.0 */
 163 -#ifndef __BCM63XX_DSP_H
 164 -#define __BCM63XX_DSP_H
 165 -
 166 -struct bcm63xx_dsp_platform_data {
 167 -       unsigned gpio_rst;
 168 -       unsigned gpio_int;
 169 -       unsigned cs;
 170 -       unsigned ext_irq;
 171 -};
 172 -
 173 -int __init bcm63xx_dsp_register(const struct bcm63xx_dsp_platform_data *pd);
 174 -
 175 -#endif /* __BCM63XX_DSP_H */
 176 --- a/arch/mips/include/asm/mach-bcm63xx/board_bcm963xx.h
 177 +++ b/arch/mips/include/asm/mach-bcm63xx/board_bcm963xx.h
 178 @@ -7,7 +7,6 @@
 179  #include <linux/leds.h>
 180  #include <bcm63xx_dev_enet.h>
 181  #include <bcm63xx_dev_usb_usbd.h>
 182 -#include <bcm63xx_dev_dsp.h>
 183
 184  /*
 185   * flash mapping
 186 @@ -31,7 +30,6 @@ struct board_info {
 187         unsigned int    has_ohci0:1;
 188         unsigned int    has_ehci0:1;
 189         unsigned int    has_usbd:1;
 190 -       unsigned int    has_dsp:1;
 191         unsigned int    has_uart0:1;
 192         unsigned int    has_uart1:1;
 193
 194 @@ -43,9 +41,6 @@ struct board_info {
 195         /* USB config */
 196         struct bcm63xx_usbd_platform_data usbd;
 197
 198 -       /* DSP config */
 199 -       struct bcm63xx_dsp_platform_data dsp;
 200 -
 201         /* GPIO LEDs */
 202         struct gpio_led leds[5];
 203