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net: sparx5: fix handling uneven length packets in manual extraction

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Packets that are not of length divisible by 4 (e.g. 77, 78, 79) would
have the checksum included up to next multiple of 4 (a 77 bytes packet
would have 3 bytes of ethernet checksum included). The check for the
value expects it in host (Little) endian.

Fixes: f3cad2611a ("net: sparx5: add hostmode with phylink support")
Signed-off-by: Casper Andersson <casper.casan@gmail.com>
Reviewed-by: Steen Hegelund <Steen.Hegelund@microchip.com>
Link: https://lore.kernel.org/r/20220825084955.684637-1-casper.casan@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Casper Andersson 2022-08-25 10:49:55 +02:00 • committed by Jakub Kicinski
parent 037c97b288
commit 7498a457ec
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/microchip/sparx5/sparx5_packet.c
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@ -113,6 +113,8 @@ static void sparx5_xtr_grp(struct sparx5 *sparx5, u8 grp, bool byte_swap)
/* This assumes STATUS_WORD_POS == 1, Status
* just after last data
*/
if (!byte_swap)
val = ntohl((__force __be32)val);
byte_cnt -= (4 - XTR_VALID_BYTES(val));
eof_flag = true;
break;