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27 March 2024, 02:37:15 UTC
Revision ffca476a0a8d26de767cc41d62b8ca7f540ecfdd authored by John Hubbard on 23 May 2020, 05:22:48 UTC, committed by Linus Torvalds on 23 May 2020, 17:26:31 UTC 
rapidio: fix an error in get_user_pages_fast() error handling
 
In the case of get_user_pages_fast() returning fewer pages than
requested, rio_dma_transfer() does not quite do the right thing.  It
attempts to release all the pages that were requested, rather than just
the pages that were pinned.

Fix the error handling so that only the pages that were successfully
pinned are released.

Fixes: e8de370188d0 ("rapidio: add mport char device driver")
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200517235620.205225-2-jhubbard@nvidia.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent c071b0f
History
Tip revision: ffca476a0a8d26de767cc41d62b8ca7f540ecfdd authored by John Hubbard on 23 May 2020, 05:22:48 UTC
rapidio: fix an error in get_user_pages_fast() error handling
Tip revision: ffca476
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