From: Andrey Vatoropin <a.vatoropin@xxxxxxx>
Subject: [PATCH] hwmon: Use 64-bit arithmetic instead of 32-bit
Add suffix ULL to constant 500 in order to give the compiler complete
information about the proper arithmetic to use. Notice that this
constant is used in a context that expects an expression of type
u64 (64 bits, unsigned).
The expression PCC_NUM_RETRIES * pcc_chan->latency, which at
preprocessing time translates to pcc_chan->latency; is currently
being evaluated using 32-bit arithmetic.
This is similar to commit b52f45110502
("ACPI / CPPC: Use 64-bit arithmetic instead of 32-bit")
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Andrey Vatoropin <a.vatoropin@xxxxxxx>
---
drivers/hwmon/xgene-hwmon.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwmon/xgene-hwmon.c b/drivers/hwmon/xgene-hwmon.c
index 1e3bd129a922..43a08ddb964b 100644
--- a/drivers/hwmon/xgene-hwmon.c
+++ b/drivers/hwmon/xgene-hwmon.c
@@ -61,7 +61,7 @@
* Arbitrary retries in case the remote processor is slow to respond
* to PCC commands
*/
-#define PCC_NUM_RETRIES 500
+#define PCC_NUM_RETRIES 500ULL
#define ASYNC_MSG_FIFO_SIZE 16
#define MBOX_OP_TIMEOUTMS 1000
--
2.43.0
