git: c1d2260a3e8c - stable/15 - igc: Avoid a signed multicast bitmap shift

The branch stable/15 has been updated by kbowling:

URL: https://cgit.FreeBSD.org/src/commit/?id=c1d2260a3e8caddf2a61567465f39a57d29ee6fc

commit c1d2260a3e8caddf2a61567465f39a57d29ee6fc
Author:     Kevin Bowling <kbowling@FreeBSD.org>
AuthorDate: 2026-08-11 19:27:35 +0000
Commit:     Kevin Bowling <kbowling@FreeBSD.org>
CommitDate: 2026-08-25 00:28:23 +0000

    igc: 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.
    
    (cherry picked from commit 275ca86f6abffc4ee6e52a6daab06f5e5c21aa05)
---
 sys/dev/igc/igc_mac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/dev/igc/igc_mac.c b/sys/dev/igc/igc_mac.c
index 2afba299e147..6a00867c7a8e 100644
--- a/sys/dev/igc/igc_mac.c
+++ b/sys/dev/igc/igc_mac.c
@@ -387,7 +387,7 @@ void igc_update_mc_addr_list_generic(struct igc_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 += (ETH_ADDR_LEN);
 	}