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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2024-05-22 20:09:49 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-12 11:12:52 +0200 |
| commit | 1b5234b2241a229b06d483e0a14b0a0ed1346d6d (patch) | |
| tree | d08c094380b143c0cf08137fb9d8238ed2bbdc52 /drivers/net/xen-netback/interface.c | |
| parent | 0889e6f209868442bab5d5dc24fd1c7769422824 (diff) | |
spi: Don't mark message DMA mapped when no transfer in it is
[ Upstream commit 9f788ba457b45b0ce422943fcec9fa35c4587764 ]
There is no need to set the DMA mapped flag of the message if it has
no mapped transfers. Moreover, it may give the code a chance to take
the wrong paths, i.e. to exercise DMA related APIs on unmapped data.
Make __spi_map_msg() to bail earlier on the above mentioned cases.
Fixes: 99adef310f68 ("spi: Provide core support for DMA mapping transfers")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://msgid.link/r/20240522171018.3362521-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net/xen-netback/interface.c')
0 files changed, 0 insertions, 0 deletions