Revision 197234520bd83aba2199add57a9d2678ee7f9781 authored by Paul Walmsley on 26 January 2012, 02:50:56 UTC, committed by Greg Kroah-Hartman on 09 February 2012, 18:48:36 UTC
The receive FIFO wakeup latency estimate in the omap-serial driver is three orders of magnitude too small. This effectively prevents the MPU from going to a low-power state when CONFIG_CPU_IDLE=y. This is a major power management regression and masks some other FIFO-related bugs in the driver. Fix by correcting the most egregious problem in the RX wakeup latency estimate. There are several other flaws in the estimator; these will be fixed by a separate patch series intended for 3.4. The difference in low-power states with this patch can be observed via debugfs in pm_debug/count. This estimate does not have any effect when CONFIG_CPU_IDLE=n. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: Alan Cox <alan@linux.intel.com> Acked-by: Govindraj.R <govindraj.raja@ti.com> Reviewed-by: Kevin Hilman <khilman@ti.com> Tested-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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File | Mode | Size |
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Kconfig | -rw-r--r-- | 12.4 KB |
Kconfig.debug | -rw-r--r-- | 1015 bytes |
Makefile | -rw-r--r-- | 1.8 KB |
backing-dev.c | -rw-r--r-- | 22.0 KB |
bootmem.c | -rw-r--r-- | 20.8 KB |
bounce.c | -rw-r--r-- | 6.5 KB |
cleancache.c | -rw-r--r-- | 6.9 KB |
compaction.c | -rw-r--r-- | 19.9 KB |
debug-pagealloc.c | -rw-r--r-- | 2.1 KB |
dmapool.c | -rw-r--r-- | 13.0 KB |
fadvise.c | -rw-r--r-- | 3.6 KB |
failslab.c | -rw-r--r-- | 1.3 KB |
filemap.c | -rw-r--r-- | 69.4 KB |
filemap_xip.c | -rw-r--r-- | 11.0 KB |
fremap.c | -rw-r--r-- | 6.7 KB |
highmem.c | -rw-r--r-- | 10.3 KB |
huge_memory.c | -rw-r--r-- | 63.6 KB |
hugetlb.c | -rw-r--r-- | 76.9 KB |
hwpoison-inject.c | -rw-r--r-- | 3.3 KB |
init-mm.c | -rw-r--r-- | 619 bytes |
internal.h | -rw-r--r-- | 8.6 KB |
kmemcheck.c | -rw-r--r-- | 2.8 KB |
kmemleak-test.c | -rw-r--r-- | 3.3 KB |
kmemleak.c | -rw-r--r-- | 52.6 KB |
ksm.c | -rw-r--r-- | 55.1 KB |
maccess.c | -rw-r--r-- | 1.6 KB |
madvise.c | -rw-r--r-- | 11.5 KB |
memblock.c | -rw-r--r-- | 26.6 KB |
memcontrol.c | -rw-r--r-- | 142.3 KB |
memory-failure.c | -rw-r--r-- | 41.7 KB |
memory.c | -rw-r--r-- | 107.6 KB |
memory_hotplug.c | -rw-r--r-- | 23.9 KB |
mempolicy.c | -rw-r--r-- | 64.5 KB |
mempool.c | -rw-r--r-- | 10.4 KB |
migrate.c | -rw-r--r-- | 33.6 KB |
mincore.c | -rw-r--r-- | 7.8 KB |
mlock.c | -rw-r--r-- | 15.7 KB |
mm_init.c | -rw-r--r-- | 3.7 KB |
mmap.c | -rw-r--r-- | 69.5 KB |
mmu_context.c | -rw-r--r-- | 1.4 KB |
mmu_notifier.c | -rw-r--r-- | 9.1 KB |
mmzone.c | -rw-r--r-- | 1.7 KB |
mprotect.c | -rw-r--r-- | 7.9 KB |
mremap.c | -rw-r--r-- | 14.0 KB |
msync.c | -rw-r--r-- | 2.4 KB |
nobootmem.c | -rw-r--r-- | 10.6 KB |
nommu.c | -rw-r--r-- | 50.7 KB |
oom_kill.c | -rw-r--r-- | 22.2 KB |
page-writeback.c | -rw-r--r-- | 67.3 KB |
page_alloc.c | -rw-r--r-- | 155.3 KB |
page_cgroup.c | -rw-r--r-- | 11.8 KB |
page_io.c | -rw-r--r-- | 3.2 KB |
page_isolation.c | -rw-r--r-- | 3.6 KB |
pagewalk.c | -rw-r--r-- | 5.7 KB |
percpu-km.c | -rw-r--r-- | 2.8 KB |
percpu-vm.c | -rw-r--r-- | 13.0 KB |
percpu.c | -rw-r--r-- | 56.6 KB |
pgtable-generic.c | -rw-r--r-- | 3.3 KB |
prio_tree.c | -rw-r--r-- | 6.3 KB |
process_vm_access.c | -rw-r--r-- | 13.3 KB |
quicklist.c | -rw-r--r-- | 2.4 KB |
readahead.c | -rw-r--r-- | 15.1 KB |
rmap.c | -rw-r--r-- | 52.2 KB |
shmem.c | -rw-r--r-- | 64.4 KB |
slab.c | -rw-r--r-- | 119.3 KB |
slob.c | -rw-r--r-- | 17.1 KB |
slub.c | -rw-r--r-- | 128.3 KB |
sparse-vmemmap.c | -rw-r--r-- | 5.9 KB |
sparse.c | -rw-r--r-- | 20.5 KB |
swap.c | -rw-r--r-- | 20.5 KB |
swap_state.c | -rw-r--r-- | 10.7 KB |
swapfile.c | -rw-r--r-- | 65.3 KB |
thrash.c | -rw-r--r-- | 3.9 KB |
truncate.c | -rw-r--r-- | 17.9 KB |
util.c | -rw-r--r-- | 7.3 KB |
vmalloc.c | -rw-r--r-- | 65.7 KB |
vmscan.c | -rw-r--r-- | 101.2 KB |
vmstat.c | -rw-r--r-- | 33.2 KB |
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