[lvc-project] [PATCH net-next 13/15] ixgbe: Fix unreachable retry logic in combined and byte I2C write functions
Tony Nguyen
anthony.l.nguyen at intel.com
Fri Apr 11 23:43:54 MSK 2025
From: Rand Deeb <rand.sec96 at gmail.com>
The current implementation of `ixgbe_write_i2c_combined_generic_int` and
`ixgbe_write_i2c_byte_generic_int` sets `max_retry` to `1`, which makes
the condition `retry < max_retry` always evaluate to `false`. This renders
the retry mechanism ineffective, as the debug message and retry logic are
never executed.
This patch increases `max_retry` to `3` in both functions, aligning them
with the retry logic in `ixgbe_read_i2c_combined_generic_int`. This
ensures that the retry mechanism functions as intended, improving
robustness in case of I2C write failures.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Rand Deeb <rand.sec96 at gmail.com>
Tested-by: Rinitha S <sx.rinitha at intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen at intel.com>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
index 0a03a8bb5f88..2d54828bdfbb 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
@@ -167,7 +167,7 @@ int ixgbe_write_i2c_combined_generic_int(struct ixgbe_hw *hw, u8 addr,
u16 reg, u16 val, bool lock)
{
u32 swfw_mask = hw->phy.phy_semaphore_mask;
- int max_retry = 1;
+ int max_retry = 3;
int retry = 0;
u8 reg_high;
u8 csum;
@@ -2285,7 +2285,7 @@ static int ixgbe_write_i2c_byte_generic_int(struct ixgbe_hw *hw, u8 byte_offset,
u8 dev_addr, u8 data, bool lock)
{
u32 swfw_mask = hw->phy.phy_semaphore_mask;
- u32 max_retry = 1;
+ u32 max_retry = 3;
u32 retry = 0;
int status;
--
2.47.1
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