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ionic: add a check for max SGs and SKB frags

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Add a check of the queue's max_sg_elems against the maximum frags we
expect to see per SKB and take the smaller of the two as our max for
the queues' descriptor buffer allocations.

Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shannon Nelson 2023-09-18 15:21:35 -07:00 committed by David S. Miller
parent 4d9d72200d
commit 40d835391b
1 changed files with 12 additions and 0 deletions
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12
drivers/net/ethernet/pensando/ionic/ionic_lif.c
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@ -3831,6 +3831,18 @@ static void ionic_lif_queue_identify(struct ionic_lif *lif)
qtype, qti->max_sg_elems);
dev_dbg(ionic->dev, " qtype[%d].sg_desc_stride = %d\n",
qtype, qti->sg_desc_stride);
if (qti->max_sg_elems >= IONIC_MAX_FRAGS) {
qti->max_sg_elems = IONIC_MAX_FRAGS - 1;
dev_dbg(ionic->dev, "limiting qtype %d max_sg_elems to IONIC_MAX_FRAGS-1 %d\n",
qtype, qti->max_sg_elems);
}
if (qti->max_sg_elems > MAX_SKB_FRAGS) {
qti->max_sg_elems = MAX_SKB_FRAGS;
dev_dbg(ionic->dev, "limiting qtype %d max_sg_elems to MAX_SKB_FRAGS %d\n",
qtype, qti->max_sg_elems);
}
}
}