From: Shannon Nelson Date: Mon, 18 Sep 2023 22:21:35 +0000 (-0700) Subject: ionic: add a check for max SGs and SKB frags X-Git-Tag: io_uring-6.7-2023-11-10~40^2~300^2~1 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=40d835391b4f0af99cf49c71fab4d6ba8511b07f;p=linux-block.git ionic: add a check for max SGs and SKB frags 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 Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c index 2c3e36b2dd7f..edc14730ce88 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c @@ -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); + } } }