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| author |   Devyn Liu <liudingyuan@huawei.com> | 2024-07-30 11:20:40 +0800 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2024-07-30 13:27:38 +0100 |
| commit | 5127c42c77de18651aa9e8e0a3ced190103b449c (patch) | |
| tree | b1a5479a03f7b3cbf10850bead31560693086171 /scripts/generate_rust_analyzer.py | |
| parent | spi: hisi-kunpeng: Add validation for the minimum value of speed_hz (diff) | |
| download | linux-rng-5127c42c77de18651aa9e8e0a3ced190103b449c.tar.xz linux-rng-5127c42c77de18651aa9e8e0a3ced190103b449c.zip | |
spi: hisi-kunpeng: Add verification for the max_frequency provided by the firmware
If the value of max_speed_hz is 0, it may cause a division by zero
error in hisi_calc_effective_speed().
The value of max_speed_hz is provided by firmware.
Firmware is generally considered as a trusted domain. However, as
division by zero errors can cause system failure, for defense measure,
the value of max_speed is validated here. So 0 is regarded as invalid
and an error code is returned.
Signed-off-by: Devyn Liu <liudingyuan@huawei.com>
Reviewed-by: Jay Fang <f.fangjian@huawei.com>
Link: https://patch.msgid.link/20240730032040.3156393-3-liudingyuan@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'scripts/generate_rust_analyzer.py')
0 files changed, 0 insertions, 0 deletions