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Some SD-cards from Sandisk that are SDA-6.0 compliant reports they supports discard, while they actually don't. This might cause mk2fs to fail while trying to format the card and revert it to a read-only mode. To fix this problem, let's add a card quirk (MMC_QUIRK_BROKEN_SD_DISCARD) to indicate that we shall fall-back to use the legacy erase command instead. Signed-off-by: Avri Altman <[email protected]> Cc: [email protected] Link: https://lore.kernel.org/r/[email protected] [Ulf: Updated the commit message] Signed-off-by: Ulf Hansson <[email protected]>