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Unverified Commit 682fee80 authored by Jonas Gorski's avatar Jonas Gorski Committed by Paul Burton
Browse files

MIPS: BCM63XX: drop unused and broken DSP platform device 



Trying to register the DSP platform device results in a null pointer
access:

[    0.124184] CPU 0 Unable to handle kernel paging request at virtual address 00000000, epc == 804e305c, ra == 804e6f20
[    0.135208] Oops[#1]:
[    0.137514] CPU: 0 PID: 1 Comm: swapper Not tainted 4.14.87
...
[    0.197117] epc   : 804e305c bcm63xx_dsp_register+0x80/0xa4
[    0.202838] ra    : 804e6f20 board_register_devices+0x258/0x390
...

This happens because it tries to copy the passed platform data over the
platform_device's unpopulated platform_data.

Since this code has been broken since its submission, no driver was ever
submitted for it, and apparently nobody was using it, just remove it
instead of trying to fix it.

Fixes: e7300d04 ("MIPS: BCM63xx: Add support for the Broadcom BCM63xx family of SOCs.")
Signed-off-by: default avatarJonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
Acked-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
parent d025bff1

arch/mips/bcm63xx/Makefile

+3 −3
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0

obj-y		+= clk.o cpu.o cs.o gpio.o irq.o nvram.o prom.o reset.o \

		   setup.o timer.o dev-dsp.o dev-enet.o dev-flash.o \

		   dev-pcmcia.o dev-rng.o dev-spi.o dev-hsspi.o dev-uart.o \

		   dev-wdt.o dev-usb-usbd.o

		   setup.o timer.o dev-enet.o dev-flash.o dev-pcmcia.o \

		   dev-rng.o dev-spi.o dev-hsspi.o dev-uart.o dev-wdt.o \

		   dev-usb-usbd.o

obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o



obj-y		+= boards/

arch/mips/bcm63xx/boards/board_bcm963xx.c

+0 −20
Original line number Diff line number Diff line
@@ -23,7 +23,6 @@ 
#include <bcm63xx_nvram.h>

#include <bcm63xx_dev_pci.h>

#include <bcm63xx_dev_enet.h>

#include <bcm63xx_dev_dsp.h>

#include <bcm63xx_dev_flash.h>

#include <bcm63xx_dev_hsspi.h>

#include <bcm63xx_dev_pcmcia.h>
@@ -289,14 +288,6 @@ static struct board_info __initdata board_96348gw_10 = { 
	.has_pccard			= 1,

	.has_ehci0			= 1,



	.has_dsp			= 1,

	.dsp = {

		.gpio_rst		= 6,

		.gpio_int		= 34,

		.cs			= 2,

		.ext_irq		= 2,

	},



	.leds = {

		{

			.name		= "adsl-fail",
@@ -401,14 +392,6 @@ static struct board_info __initdata board_96348gw = { 


	.has_ohci0 = 1,



	.has_dsp			= 1,

	.dsp = {

		.gpio_rst		= 6,

		.gpio_int		= 34,

		.ext_irq		= 2,

		.cs			= 2,

	},



	.leds = {

		{

			.name		= "adsl-fail",
@@ -898,9 +881,6 @@ int __init board_register_devices(void) 
	if (board.has_usbd)

		bcm63xx_usbd_register(&board.usbd);



	if (board.has_dsp)

		bcm63xx_dsp_register(&board.dsp);



	/* Generate MAC address for WLAN and register our SPROM,

	 * do this after registering enet devices

	 */

arch/mips/bcm63xx/dev-dsp.c

deleted100644 → 0
+0 −56
Original line number Diff line number Diff line 
/*

 * Broadcom BCM63xx VoIP DSP registration

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org>

 */



#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/platform_device.h>



#include <bcm63xx_cpu.h>

#include <bcm63xx_dev_dsp.h>

#include <bcm63xx_regs.h>

#include <bcm63xx_io.h>



static struct resource voip_dsp_resources[] = {

	{

		.start		= -1, /* filled at runtime */

		.end		= -1, /* filled at runtime */

		.flags		= IORESOURCE_MEM,

	},

	{

		.start		= -1, /* filled at runtime */

		.flags		= IORESOURCE_IRQ,

	},

};



static struct platform_device bcm63xx_voip_dsp_device = {

	.name		= "bcm63xx-voip-dsp",

	.id		= -1,

	.num_resources	= ARRAY_SIZE(voip_dsp_resources),

	.resource	= voip_dsp_resources,

};



int __init bcm63xx_dsp_register(const struct bcm63xx_dsp_platform_data *pd)

{

	struct bcm63xx_dsp_platform_data *dpd;

	u32 val;



	/* Get the memory window */

	val = bcm_mpi_readl(MPI_CSBASE_REG(pd->cs - 1));

	val &= MPI_CSBASE_BASE_MASK;

	voip_dsp_resources[0].start = val;

	voip_dsp_resources[0].end = val + 0xFFFFFFF;

	voip_dsp_resources[1].start = pd->ext_irq;



	/* copy given platform data */

	dpd = bcm63xx_voip_dsp_device.dev.platform_data;

	memcpy(dpd, pd, sizeof (*pd));



	return platform_device_register(&bcm63xx_voip_dsp_device);

}

arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_dsp.h

deleted100644 → 0
+0 −14
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#ifndef __BCM63XX_DSP_H

#define __BCM63XX_DSP_H



struct bcm63xx_dsp_platform_data {

	unsigned gpio_rst;

	unsigned gpio_int;

	unsigned cs;

	unsigned ext_irq;

};



int __init bcm63xx_dsp_register(const struct bcm63xx_dsp_platform_data *pd);



#endif /* __BCM63XX_DSP_H */

arch/mips/include/asm/mach-bcm63xx/board_bcm963xx.h

+0 −5
Original line number Diff line number Diff line
@@ -7,7 +7,6 @@ 
#include <linux/leds.h>

#include <bcm63xx_dev_enet.h>

#include <bcm63xx_dev_usb_usbd.h>

#include <bcm63xx_dev_dsp.h>



/*

 * flash mapping
@@ -31,7 +30,6 @@ struct board_info { 
	unsigned int	has_ohci0:1;

	unsigned int	has_ehci0:1;

	unsigned int	has_usbd:1;

	unsigned int	has_dsp:1;

	unsigned int	has_uart0:1;

	unsigned int	has_uart1:1;
@@ -43,9 +41,6 @@ struct board_info { 
	/* USB config */

	struct bcm63xx_usbd_platform_data usbd;



	/* DSP config */

	struct bcm63xx_dsp_platform_data dsp;



	/* GPIO LEDs */

	struct gpio_led leds[5];