Roger Quadros 3e3809d03c ARM: 8617/1: dma: fix dma_max_pfn() ... commit d248220f04 upstream. Since commit 6ce0d20016 ("ARM: dma: Use dma_pfn_offset for dma address translation"), dma_to_pfn() already returns the PFN with the physical memory start offset so we don't need to add it again. This fixes USB mass storage lock-up problem on systems that can't do DMA over the entire physical memory range (e.g.) Keystone 2 systems with 4GB RAM can only do DMA over the first 2GB. [K2E-EVM]. What happens there is that without this patch SCSI layer sets a wrong bounce buffer limit in scsi_calculate_bounce_limit() for the USB mass storage device. dma_max_pfn() evaluates to 0x8fffff and bounce_limit is set to 0x8fffff000 whereas maximum DMA'ble physical memory on Keystone 2 is 0x87fffffff. This results in non DMA'ble pages being given to the USB controller and hence the lock-up. NOTE: in the above case, USB-SCSI-device's dma_pfn_offset was showing as 0. This should have really been 0x780000 as on K2e, LOWMEM_START is 0x80000000 and HIGHMEM_START is 0x800000000. DMA zone is 2GB so dma_max_pfn should be 0x87ffff. The incorrect dma_pfn_offset for the USB storage device is because USB devices are not correctly inheriting the dma_pfn_offset from the USB host controller. This will be fixed by a separate patch. Fixes: 6ce0d20016 ("ARM: dma: Use dma_pfn_offset for dma address translation") Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Santosh Shilimkar <santosh.shilimkar@oracle.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Olof Johansson <olof@lixom.net> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Linus Walleij <linus.walleij@linaro.org> Reported-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2016-10-07 15:23:40 +02:00
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hardware
mach
xen
arch_gicv3.h
arch_timer.h
arm-cci.h
asm-offsets.h
assembler.h
atomic.h
auxvec.h
barrier.h
bitops.h
bitrev.h
bL_switcher.h
bug.h
bugs.h
cache.h
cacheflush.h
cachetype.h
checksum.h
clkdev.h
cmpxchg.h
compiler.h
cp15.h
cpu.h
cpuidle.h
cputype.h
cti.h
dcc.h
delay.h
device.h
div64.h
dma-contiguous.h
dma-iommu.h
dma-mapping.h	ARM: 8617/1: dma: fix dma_max_pfn()	2016-10-07 15:23:40 +02:00
dma.h
domain.h
ecard.h
edac.h
elf.h
entry-macro-multi.S
exception.h
fb.h
fiq.h
firmware.h
fixmap.h
flat.h
floppy.h
fncpy.h
fpstate.h
ftrace.h
futex.h
glue-cache.h
glue-df.h
glue-pf.h
glue-proc.h
glue.h
gpio.h
hardirq.h
highmem.h
hugetlb-3level.h
hugetlb.h
hw_breakpoint.h
hw_irq.h
hwcap.h
hypervisor.h
ide.h
idmap.h
insn.h
io.h
irq_work.h
irq.h
irqflags.h
jump_label.h
Kbuild
kexec.h
kgdb.h
kmap_types.h
kprobes.h
kvm_arm.h
kvm_asm.h
kvm_coproc.h
kvm_emulate.h
kvm_host.h
kvm_mmio.h
kvm_mmu.h
kvm_psci.h
limits.h
linkage.h
mach-types.h
mc146818rtc.h
mcpm.h
mcs_spinlock.h
memblock.h
memory.h
mmu_context.h
mmu.h
module.h
mpu.h
mtd-xip.h
mutex.h
neon.h
nwflash.h
opcodes-sec.h
opcodes-virt.h
opcodes.h
outercache.h
page-nommu.h
page.h
patch.h
pci.h
percpu.h
perf_event.h
pgalloc.h
pgtable-2level-hwdef.h
pgtable-2level-types.h
pgtable-2level.h
pgtable-3level-hwdef.h
pgtable-3level-types.h
pgtable-3level.h
pgtable-hwdef.h
pgtable-nommu.h
pgtable.h
probes.h
proc-fns.h
processor.h
procinfo.h
prom.h
psci.h
ptrace.h
setup.h
shmparam.h
signal.h
smp_plat.h
smp_scu.h
smp_twd.h
smp.h
sparsemem.h
spinlock_types.h
spinlock.h
stackprotector.h
stacktrace.h
string.h
suspend.h
swab.h
switch_to.h
sync_bitops.h
syscall.h
system_info.h
system_misc.h
tcm.h
therm.h
thread_info.h
thread_notify.h
timex.h
tlb.h
tlbflush.h
tls.h
topology.h
traps.h
trusted_foundations.h
types.h
uaccess.h
ucontext.h
unified.h
unistd.h
unwind.h
uprobes.h
user.h
v7m.h
vdso_datapage.h
vdso.h
vfp.h
vfpmacros.h
vga.h
virt.h
word-at-a-time.h
xor.h