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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Makefile | -rw-r--r-- | 394 bytes |
compat.c | -rw-r--r-- | 17.0 KB |
compat_mq.c | -rw-r--r-- | 4.1 KB |
ipc_sysctl.c | -rw-r--r-- | 6.0 KB |
ipcns_notifier.c | -rw-r--r-- | 2.2 KB |
mq_sysctl.c | -rw-r--r-- | 2.7 KB |
mqueue.c | -rw-r--r-- | 30.6 KB |
msg.c | -rw-r--r-- | 20.9 KB |
msgutil.c | -rw-r--r-- | 2.7 KB |
namespace.c | -rw-r--r-- | 4.3 KB |
sem.c | -rw-r--r-- | 42.1 KB |
shm.c | -rw-r--r-- | 29.2 KB |
syscall.c | -rw-r--r-- | 2.3 KB |
util.c | -rw-r--r-- | 22.8 KB |
util.h | -rw-r--r-- | 5.3 KB |
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