Adrian Hunter and Ulf Hansson e0097cf5f2
mmc: queue: Fix queue thread wake-up ...
The only time the driver sleeps expecting to be woken upon the arrival of
a new request, is when the dispatch queue is empty. The only time that it
is known whether the dispatch queue is empty is after NULL is returned
from blk_fetch_request() while under the queue lock.
Recognizing those facts, simplify the synchronization between the queue
thread and the request function. A couple of flags tell the request
function what to do, and the queue lock and barriers associated with
wake-ups ensure synchronization.
The result is simpler and allows the removal of the context_info lock.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com >
Reviewed-by: Linus Walleij <linus.walleij@linaro.org >
Reviewed-by: Harjani Ritesh <riteshh@codeaurora.org >
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org >
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Adrian HunterandUlf Hansson
e0097cf5f2