git: a86d65b2c99b - main - e1000: Avoid a signed multicast bitmap shift

The branch main has been updated by kbowling:

URL: https://cgit.FreeBSD.org/src/commit/?id=a86d65b2c99bab3fe46389b3b51ad27956dccfe9

commit a86d65b2c99bab3fe46389b3b51ad27956dccfe9
Author:     Kevin Bowling <kbowling@FreeBSD.org>
AuthorDate: 2026-08-11 19:00:51 +0000
Commit:     Kevin Bowling <kbowling@FreeBSD.org>
CommitDate: 2026-08-11 20:59:32 +0000

    e1000: Avoid a signed multicast bitmap shift
    
    The multicast hash bit can be 31.  Use an unsigned value so setting the
    bit cannot shift a signed integer into its sign bit.
    
    MFC after:      2 weeks
---
 sys/dev/e1000/e1000_mac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/dev/e1000/e1000_mac.c b/sys/dev/e1000/e1000_mac.c
index eb2c29d153dc..46e91773c126 100644
--- a/sys/dev/e1000/e1000_mac.c
+++ b/sys/dev/e1000/e1000_mac.c
@@ -611,7 +611,7 @@ void e1000_update_mc_addr_list_generic(struct e1000_hw *hw,
 		hash_reg = (hash_value >> 5) & (hw->mac.mta_reg_count - 1);
 		hash_bit = hash_value & 0x1F;
 
-		hw->mac.mta_shadow[hash_reg] |= (1 << hash_bit);
+		hw->mac.mta_shadow[hash_reg] |= 1U << hash_bit;
 		mc_addr_list += (ETHER_ADDR_LEN);
 	}