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linux/arch/mips
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Markos Chandras 0845bb721e MIPS: iomap: Use __mem_{read,write}{b,w,l} for MMIO 
Using the __raw_{read,write}{b,w,l} functions to perform
repeatable MMIO could result in problems if the host bus
does not match the endianness of the PCI/ISA. This problem
is visible on big-endian SEAD3 configurations after commit
2925f6c0c7
"net: smc911x: use io{read,write}*_rep accessors". This effectively
moves away from using the __mem_* variants to __raw_* ones
and causes a kernel bug as follows:

Call Trace:
CPU 0 Unable to handle kernel paging request at virtual address 00000000,
epc == 00000000, ra == 8012b3b0
Oops[#1]:
Cpu 0
$ 0   : 00000000 00000065 00000000 00000004
$ 4   : 00000000 00000000 9a82dd60 00000000
$ 8   : 00000000 00000000 a00ae278 00000007
$12   : 0000000e 00000011 804c4228 ffff9411
$16   : 00000100 00000000 80560000 807fc6d0
$20   : 807fc8d0 807fcad0 807fbec0 00000100
$24   : 00009150 80109be0
$28   : 9a82c000 9a82dd28 00000001 8012b3b0
Hi    : 00000000
Lo    : 00000000
epc   : 00000000   (null)
    Not tainted
ra    : 8012b3b0 call_timer_fn.isra.39+0x24/0x84
Status: 10009503    KERNEL EXL IE
Cause : 00800808
BadVA : 00000000
PrId  : 00019c20 (MIPS M14Kc)
Modules linked in:
Process swapper (pid: 1, threadinfo=9a82c000, task=9a82ba18, tls=00000000)
Stack : 00000040 00000000 00000007 8056732c 80580000 00000001 9a82dd60 00200200
        80560000 8012b598 8056732c 80580000 00000001 00000000 9a82dd60 9a82dd60
        00000000 807fbd44 807fbd40 805664e0 0000000a 80800000 00000004 80125924
        0000fda0 000007f0 80000000 00000001 80800000 007f0000 00200140 80166338
        00000000 8100fda0 0000fda0 000007f0 80000000 00000001 80800000 007f0000
        ...
Call Trace:
[<8012b598>] run_timer_softirq+0x188/0x1f4
[<80125924>] __do_softirq+0xc4/0x18c
[<80166338>] handle_percpu_irq+0x54/0x84
[<80125aa4>] do_softirq+0x68/0x70
[<80103b50>] do_IRQ+0x18/0x28
[<80125d1c>] irq_exit+0x94/0xc0
[<80125aa4>] do_softirq+0x68/0x70
[<80102130>] ret_from_irq+0x0/0x4
[<80102130>] ret_from_irq+0x0/0x4
[<80125d1c>] irq_exit+0x94/0xc0
[<803165b0>] __bzero+0xd4/0x164
[<80346d0c>] mem32_serial_out+0x0/0x1c
[<8010d4ac>] free_init_pages+0x98/0xfc
[<80180a08>] free_hot_cold_page+0x2c/0x1c4
[<80180bd8>] __free_pages+0x38/0x98
[<8010d4a0>] free_init_pages+0x8c/0xfc
[<8010d4ac>] free_init_pages+0x98/0xfc
[<8049fb04>] kernel_init+0x28/0x15c
[<80147484>] schedule_tail+0x1c/0x60
[<8049fadc>] kernel_init+0x0/0x15c
[<80102178>] ret_from_kernel_thread+0x14/0x1c
[<8040a06f>] skb_pad+0xe7/0x13c

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: Steve Glendinning <steve.glendinning@shawell.net>
Cc: Ben Boeckel <mathstuf@gmail.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Cc: Jeffrey Deans <Jeffrey.Deans@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6672/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-11-24 07:45:42 +01:00
..
alchemy MIPS: Alchemy: Remove direct access to prepare_count field of struct clk 2014-11-24 07:45:17 +01:00
ar7 mips: Convert pr_warning to pr_warn 2014-11-24 07:44:51 +01:00
ath25 MIPS: ath25: add Wireless device support 2014-11-24 07:45:29 +01:00
ath79 MIPS: ath79: Read the initrd address from the firmware environment 2014-11-24 07:45:30 +01:00
bcm47xx MIPS: BCM47XX: Clean up nvram header 2014-11-24 07:45:08 +01:00
bcm63xx MIPS: Remove useless parentheses 2014-11-24 07:44:49 +01:00
bcm3384 MIPS: bcm3384: Initial commit of bcm3384 platform support 2014-11-24 07:45:13 +01:00
boot MIPS: bcm3384: Initial commit of bcm3384 platform support 2014-11-24 07:45:13 +01:00
cavium-octeon MIPS: Octeon: Mark octeon_model_get_string() with __init 2014-11-24 07:45:32 +01:00
cobalt
configs MIPS: bcm3384: Initial commit of bcm3384 platform support 2014-11-24 07:45:13 +01:00
dec
emma
fw MIPS: FW: Use kstrtoul() to parse unsigned long from the fw environment 2014-11-24 07:45:26 +01:00
include MIPS: <asm/types.h> fix indentation. 2014-11-24 07:45:41 +01:00
jazz
jz4740 This is the bulk of GPIO changes for the v3.17 development 2014-08-08 18:00:35 -07:00
kernel MIPS: Enable VDSO randomization 2014-11-24 07:45:38 +01:00
kvm KVM: remove garbage arg to *hardware_{en,dis}able 2014-08-29 16:35:55 +02:00
lantiq MIPS: lantiq: add missing spi clock on falcon SoC 2014-11-24 07:45:18 +01:00
lasat MIPS: Lasat: Add missing CONFIG_PROC_FS dependency to PICVUE_PROC 2014-10-21 17:35:44 +02:00
lib MIPS: iomap: Use __mem_{read,write}{b,w,l} for MMIO 2014-11-24 07:45:42 +01:00
loongson MIPS: loongson: common: rtc: make loongson_rtc_resources static 2014-11-24 07:45:35 +01:00
loongson1 MIPS: Loongson1B: Add a clockevent/clocksource using PWM Timer 2014-11-24 07:45:09 +01:00
math-emu MIPS: Support for hybrid FPRs 2014-11-24 07:45:07 +01:00
mm MIPS: mm: Only build one microassembler that is suitable 2014-11-24 07:45:36 +01:00
mti-malta clocksource: mips-gic: Move gic_frequency to clocksource driver 2014-11-24 07:45:15 +01:00
mti-sead3 MIPS: Move gic.h to include/linux/irqchip/mips-gic.h 2014-11-24 07:44:59 +01:00
net Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-10-18 14:24:36 -07:00
netlogic MIPS: Netlogic: Move device-trees to arch/mips/boot/dts/ 2014-09-22 13:35:50 +02:00
oprofile MIPS: oprofile: Backtrace: don't fail on leaf functions 2014-11-24 07:45:31 +01:00
paravirt
pci MIPS: ath25: add AR2315 PCI host controller driver 2014-11-24 07:45:28 +01:00
pmcs-msp71xx MIPS: Remove useless parentheses 2014-11-24 07:44:49 +01:00
pnx833x
power nosave: consolidate __nosave_{begin,end} in <asm/sections.h> 2014-10-09 22:26:04 -04:00
ralink MIPS: ralink: add rt2880 pci driver 2014-11-24 07:45:25 +01:00
rb532 MIPS: Remove useless parentheses 2014-11-24 07:44:49 +01:00
sgi-ip22 MIPS: Remove useless parentheses 2014-11-24 07:44:49 +01:00
sgi-ip27 MIPS: Remove useless parentheses 2014-11-24 07:44:49 +01:00
sgi-ip32
sibyte MIPS: Remove useless parentheses 2014-11-24 07:44:49 +01:00
sni
txx9 mips: Convert pr_warning to pr_warn 2014-11-24 07:44:51 +01:00
vr41xx
Kbuild
Kbuild.platforms MIPS: ath25: add common parts 2014-11-24 07:45:26 +01:00
Kconfig MIPS: Kconfig: Only allow 32-bit microMIPS builds 2014-11-24 07:45:36 +01:00
Kconfig.debug MIPS: Kconfig option to better exercise/debug hybrid FPRs 2014-11-24 07:45:08 +01:00
Makefile MIPS: IP22/IP32: Add line to arch/mips/Makefile archhelp about vmlinux.32 2014-11-24 07:45:33 +01:00