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loop: Fix missing discard support when using LOOP_CONFIGURE
commit 2b9ac22 upstream. Without calling loop_config_discard() the discard flag and parameters aren't set/updated for the loop device and worst-case they could indicate discard support when it isn't the case (ex: if the LOOP_SET_STATUS ioctl was used with a different file prior to LOOP_CONFIGURE). Cc: <stable@vger.kernel.org> # 5.8.x- Fixes: 3448914 ("loop: Add LOOP_CONFIGURE ioctl") Signed-off-by: Kristian Klausen <kristian@klausen.dk> Link: https://lore.kernel.org/r/20210618115157.31452-1-kristian@klausen.dk Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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