mmc: don't reference requests after finishing them #6418
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Posted write tracking introduced in the commit below raced with re-use of the requests between completion and submission, potentially causing underflow of the pending write count. Fixes: e6c1e86 ("mmc: restrict posted write counts for SD cards in CQ mode") Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
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First candidate fix for #6349 - obvious bug when you think about it.
I'll make a separate combination PR for clearing all Async requests if a Sync request needs the CQE to halt.