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author | Yifeng Li <tomli@tomli.me> | 2019-04-02 18:14:10 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-25 19:26:58 +0300 |
commit | 9adc440e305126c1555e84bde38249b0d1437c39 (patch) | |
tree | 90414b7e39b82f7d69b9924309f60bdd0253f940 /Makefile | |
parent | 038ec2c13e0d1f7b9d45a081786f18f75b65f11b (diff) | |
download | linux-9adc440e305126c1555e84bde38249b0d1437c39.tar.xz |
fbdev: sm712fb: fix memory frequency by avoiding a switch/case fallthrough
commit 9dc20113988b9a75ea6b3abd68dc45e2d73ccdab upstream.
A fallthrough in switch/case was introduced in f627caf55b8e ("fbdev:
sm712fb: fix crashes and garbled display during DPMS modesetting"),
due to my copy-paste error, which would cause the memory clock frequency
for SM720 to be programmed to SM712.
Since it only reprograms the clock to a different frequency, it's only
a benign issue without visible side-effect, so it also evaded Sudip
Mukherjee's code review and regression tests. scripts/checkpatch.pl
also failed to discover the issue, possibly due to nested switch
statements.
This issue was found by Stephen Rothwell by building linux-next with
-Wimplicit-fallthrough.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: f627caf55b8e ("fbdev: sm712fb: fix crashes and garbled display during DPMS modesetting")
Signed-off-by: Yifeng Li <tomli@tomli.me>
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Makefile')
0 files changed, 0 insertions, 0 deletions