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Commit f037097d authored by Jonathan Bell's avatar Jonathan Bell Committed by Phil Elwell
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drivers: mmc: disable write-caching on Samsung 2023 model year SD cards



Samsung EVO Plus, Pro Plus and Evo Ultimate cards of this era appear to
have a broken cache-flush implementation when operating in CQ mode.

Unfortunately the cards seem to use a separate CID name string for every
variant and capacity, so nobble the cache feature for this MANFID, OEMID
and year. Turning this off seems to have negligible impact on
random-write throughput in non-CQ mode.

Signed-off-by: default avatarJonathan Bell <jonathan@raspberrypi.com>
parent f3cd5120
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