Revision 70e8b40176c75d3544024e7c934720b11a8a11bf authored by Bjorn Helgaas on 08 September 2016, 21:43:40 UTC, committed by Bjorn Helgaas on 14 September 2016, 19:24:25 UTC
After 1469d17dd341 ("PCI: pciehp: Handle invalid data when reading from
non-existent devices"), we returned IRQ_HANDLED when we failed to read
interrupt status from the bridge. I think it's better to return IRQ_NONE,
as we do in other cases where there's no interrupt pending. This will
facilitate refactoring the loop in pcie_isr(): we'll be able to call the
ISR in a loop as long as it returns IRQ_HANDLED.
Return IRQ_NONE if we couldn't read interrupt status.
Tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> 1 parent a8499f2
strnlen_user.S
/*
* Copy to/from userspace with optional address space checking.
*
* Copyright 2004-2006 Atmel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <asm/page.h>
#include <asm/thread_info.h>
#include <asm/processor.h>
#include <asm/asm.h>
.text
.align 1
.global strnlen_user
.type strnlen_user, "function"
strnlen_user:
branch_if_kernel r8, __strnlen_user
sub r8, r11, 1
add r8, r12
retcs 0
brmi adjust_length /* do a closer inspection */
.global __strnlen_user
.type __strnlen_user, "function"
__strnlen_user:
mov r10, r12
10: ld.ub r8, r12++
cp.w r8, 0
breq 2f
sub r11, 1
brne 10b
sub r12, -1
2: sub r12, r10
retal r12
.type adjust_length, "function"
adjust_length:
cp.w r12, 0 /* addr must always be < TASK_SIZE */
retmi 0
pushm lr
lddpc lr, _task_size
sub r11, lr, r12
mov r9, r11
call __strnlen_user
cp.w r12, r9
brgt 1f
popm pc
1: popm pc, r12=0
.align 2
_task_size:
.long TASK_SIZE
.section .fixup, "ax"
.align 1
19: retal 0
.section __ex_table, "a"
.align 2
.long 10b, 19b
Computing file changes ...
