diff options
| author | Julian Wiedmann <jwi@linux.ibm.com> | 2021-12-07 10:04:48 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-12-08 07:01:01 +0100 |
| commit | 5e9756a66fb5741f46b9c1d9ad50e4e57c8d6816 (patch) | |
| tree | d2afc9b819ffda6f5c0b77162b212313af0e480b /drivers/s390/net | |
| parent | hv_sock: Extract hvs_send_data() helper that takes only header (diff) | |
| download | linux-5e9756a66fb5741f46b9c1d9ad50e4e57c8d6816.tar.xz linux-5e9756a66fb5741f46b9c1d9ad50e4e57c8d6816.zip | |
s390/qeth: simplify qeth_receive_skb()
Now that the OSN code is gone, we don't need the second switch statement
in the RX path. And getting rid of its (unreachable) default case is a
nice simplification.
Also don't pass in the full HW header, all we still need is a flag to
indicate whether the skb can use CSO. This we can already obtain during
the first peek at the HW header.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/s390/net')
| -rw-r--r-- | drivers/s390/net/qeth_core_main.c | 34 |
1 files changed, 12 insertions, 22 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index d32aa8b705db..629a7f5c4d71 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -5575,29 +5575,9 @@ static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb, #endif static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb, - struct qeth_hdr *hdr, bool uses_frags) + bool uses_frags, bool is_cso) { struct napi_struct *napi = &card->napi; - bool is_cso; - - switch (hdr->hdr.l2.id) { -#if IS_ENABLED(CONFIG_QETH_L3) - case QETH_HEADER_TYPE_LAYER3: - qeth_l3_rebuild_skb(card, skb, hdr); - is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ; - break; -#endif - case QETH_HEADER_TYPE_LAYER2: - is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ; - break; - default: - /* never happens */ - if (uses_frags) - napi_free_frags(napi); - else - kfree_skb(skb); - return; - } if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) { skb->ip_summed = CHECKSUM_UNNECESSARY; @@ -5654,6 +5634,7 @@ static int qeth_extract_skb(struct qeth_card *card, struct qeth_hdr *hdr; struct sk_buff *skb; int skb_len = 0; + bool is_cso; element = &buffer->element[*element_no]; @@ -5673,11 +5654,15 @@ next_packet: switch (hdr->hdr.l2.id) { case QETH_HEADER_TYPE_LAYER2: skb_len = hdr->hdr.l2.pkt_length; + is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ; + linear_len = ETH_HLEN; headroom = 0; break; case QETH_HEADER_TYPE_LAYER3: skb_len = hdr->hdr.l3.length; + is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ; + if (!IS_LAYER3(card)) { QETH_CARD_STAT_INC(card, rx_dropped_notsupp); goto walk_packet; @@ -5804,7 +5789,12 @@ walk_packet: *element_no = element - &buffer->element[0]; *__offset = offset; - qeth_receive_skb(card, skb, hdr, uses_frags); +#if IS_ENABLED(CONFIG_QETH_L3) + if (hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER3) + qeth_l3_rebuild_skb(card, skb, hdr); +#endif + + qeth_receive_skb(card, skb, uses_frags, is_cso); return 0; } |