[lvc-project] [PATCH v2] hwmon: (xgene-hwmon) use appropriate type for the latency value

Guenter Roeck linux at roeck-us.net
Fri Feb 7 05:52:54 MSK 2025


On Tue, Feb 04, 2025 at 09:54:08AM +0000, Ваторопин Андрей wrote:
> From: Andrey Vatoropin <a.vatoropin at crpt.ru>
> 
> The expression PCC_NUM_RETRIES * pcc_chan->latency is currently being
> evaluated using 32-bit arithmetic.
> 
> Since a value of type 'u64' is used to store the eventual result,
> and this result is later sent to the function usecs_to_jiffies with 
> input parameter unsigned int, the current data type is too wide to 
> store the value of ctx->usecs_lat.
> 
> Change the data type of "usecs_lat" to a more suitable (narrower) type.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Signed-off-by: Andrey Vatoropin <a.vatoropin at crpt.ru>

Applied.

Thanks,
Guenter



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