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hwmon: (xgene-hwmon) use appropriate type for the latency value

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[ Upstream commit 8df0f002827e18632dcd986f7546c1abf1953a6f ]

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@crpt.ru>
Link: https://lore.kernel.org/r/20250204095400.95013-1-a.vatoropin@crpt.ru
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Andrey Vatoropin 2025-02-04 09:54:08 +00:00 • committed by Greg Kroah-Hartman
commit c4e068ad25
1 changed files with 1 additions and 1 deletions
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2
drivers/hwmon/xgene-hwmon.c
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@ -110,7 +110,7 @@ struct xgene_hwmon_dev {
phys_addr_t comm_base_addr;
void *pcc_comm_addr;
u64 usecs_lat;
unsigned int usecs_lat;
};
/*