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author | NeilBrown <neilb@suse.de> | 2013-03-19 18:38:15 +0100 |
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committer | Benoit Cousson <benoit.cousson@linaro.org> | 2013-04-09 00:21:29 +0200 |
commit | 9cc268d5bbc097ae5a3ae236fb2461ea113274bf (patch) | |
tree | 05751016c7bde8b73ee2fbe6564ddb6bd1fb8db0 /crypto/rmd160.c | |
parent | ARM: dts: AM33XX: Corrects typo in interrupt field in SPI node (diff) | |
download | linux-9cc268d5bbc097ae5a3ae236fb2461ea113274bf.tar.xz linux-9cc268d5bbc097ae5a3ae236fb2461ea113274bf.zip |
ARM: OMAP: Simplify dmtimer context-loss handling
The context loss handling in dmtimer appears to assume that
omap_dm_timer_set_load_start() or omap_dm_timer_start() and
omap_dm_timer_stop() bracket all interactions. Only the first two
restore the context and the last updates the context loss counter.
However omap_dm_timer_set_load() or omap_dm_timer_set_match() can
reasonably be called outside this bracketing, and the fact that they
call omap_dm_timer_enable() / omap_dm_timer_disable() suggest that
is expected.
So if, after a transition into and out of off-mode which would cause
the dm timer to loose all state, omap_dm_timer_set_match() is called
before omap_dm_timer_start(), the value read from OMAP_TIMER_CTRL_REG
will be 'wrong' and this wrong value will be stored context.tclr so
a subsequent omap_dm_timer_start() can fail (As the control register
is wrong).
Simplify this be doing the restore-from-context in
omap_dm_timer_enable() so that whenever the timer is enabled, the
context is correct. Also update the ctx_loss_count at the same time as
we notice it is wrong - these is no value in delaying this until the
omap_dm_timer_disable() as it cannot change while the timer is enabled.
Signed-off-by: NeilBrown <neilb@suse.de>
[jon-hunter@ti.com: minor update to subject and changed variable name]
Signed-off-by: Jon Hunter <jon-hunter@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>
Diffstat (limited to 'crypto/rmd160.c')
0 files changed, 0 insertions, 0 deletions