From: Wong Vee Khee <vee.khee.wong@xxxxxxxxxxxxxxx>
[ Upstream commit 52e597d3e2e6e5bfce47559eb22b955ac17b3826 ]
The commit d96febedfde2 ("net: stmmac: arrange Tx tail pointer update
to stmmac_flush_tx_descriptors") introduced the following coverity
warning:-
1. Unintentional integer overflow (OVERFLOW_BEFORE_WIDEN)
overflow_before_widen: Potentially overflowing expression
'tx_q->cur_tx * desc_size' with type 'unsigned int' (32 bits,
unsigned) is evaluated using 32-bit arithmetic, and then used in a
context that expects an expression of type dma_addr_t (64 bits,
unsigned).
Fixed this by assigning tx_tail_addr to dma_addr_t type, as dma_addr_t
datatype is decided by CONFIG_ARCH_DMA_ADDR_T_64_BIT.
Fixes: d96febedfde2 ("net: stmmac: arrange Tx tail pointer update to stmmac_flush_tx_descriptors")
Signed-off-by: Wong Vee Khee <vee.khee.wong@xxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/stmicro/stmmac/stmmac.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index b6cd43eda7ac..8aa55612d094 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -75,7 +75,7 @@ struct stmmac_tx_queue {
unsigned int cur_tx;
unsigned int dirty_tx;
dma_addr_t dma_tx_phy;
- u32 tx_tail_addr;
+ dma_addr_t tx_tail_addr;
u32 mss;
};
--
2.30.2
