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kernel: fix kernel panic in mtk_ppe

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The patch that adds support for hw flow-offloading counters on newer
MediaTek SoCs tries to prints acct->packets and acct->bytes in debugfs,
without checking that acct isn't null. This causes a kernel panic when
trying to read /sys/kernel/debug/ppe0/entries on older MediaTek SoCs.
Fix this by adding a check for acct.

Fixes: 9721a42a27 ("kernel: support hw flow-offloading counters on newer MediaTek SoCs")
Reported-by: Stijn Tintel <stijn@linux-ipv6.be>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle 2023-01-16 19:40:24 +00:00 committed by AmadeusGhost
parent 2b13399bb7
commit ec753a97ff
1 changed files with 1 additions and 1 deletions
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2
target/linux/generic/pending-5.15/731-net-ethernet-mediatek-ppe-add-support-for-flow-accou.patch
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@ -357,7 +357,7 @@ v2: fix wrong variable name in return value check spotted by Denis Kirjanov
h_source, h_dest, ntohs(l2->etype),
- l2->vlan1, l2->vlan2, entry->ib1, ib2);
+ l2->vlan1, l2->vlan2, entry->ib1, ib2,
+ acct->packets, acct->bytes);
+ acct ? acct->packets : 0, acct ? acct->bytes : 0);
}
return 0;