From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8DE9AC43219 for ; Sat, 27 Apr 2019 15:28:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 67CEB208CA for ; Sat, 27 Apr 2019 15:28:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728453AbfD0P2V (ORCPT ); Sat, 27 Apr 2019 11:28:21 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:33120 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727354AbfD0PPW (ORCPT ); Sat, 27 Apr 2019 11:15:22 -0400 Received: from [192.168.4.242] (helo=deadeye) by shadbolt.decadent.org.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hKP2t-0000zB-4x; Sat, 27 Apr 2019 16:15:19 +0100 Received: from ben by deadeye with local (Exim 4.92) (envelope-from ) id 1hKP2o-0004ei-57; Sat, 27 Apr 2019 16:15:14 +0100 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, Denis Kirjanov , "Hante Meuleman" , "Kalle Valo" , "Arend van Spriel" , "Pieter-Paul Giesberts" , "Franky (Zhenhui) Lin" Date: Sat, 27 Apr 2019 16:13:09 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) X-Patchwork-Hint: ignore Subject: [PATCH 3.16 193/202] brcmfmac: consolidate ifp lookup in driver core In-Reply-To: X-SA-Exim-Connect-IP: 192.168.4.242 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.66-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Arend van Spriel commit 75effb03ee8e4c9d4bbc909118ce5444b047dfde upstream. In rx path the firmware provide an interface index which is used to map to a struct brcmf_if instance. However, this involves some trick that is done in two places. This is changed by having driver core providing brcmf_get_ifp() function. Reviewed-by: Hante Meuleman Reviewed-by: Franky (Zhenhui) Lin Reviewed-by: Pieter-Paul Giesberts Signed-off-by: Arend van Spriel Signed-off-by: Kalle Valo [bwh: Backported to 3.16: - Drop changes to PCIe bus support - Adjust filenames] Signed-off-by: Ben Hutchings --- --- a/drivers/net/wireless/brcm80211/brcmfmac/bcdc.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/bcdc.c @@ -276,6 +276,7 @@ brcmf_proto_bcdc_hdrpull(struct brcmf_pu struct sk_buff *pktbuf) { struct brcmf_proto_bcdc_header *h; + struct brcmf_if *ifp; brcmf_dbg(BCDC, "Enter\n"); @@ -289,30 +290,21 @@ brcmf_proto_bcdc_hdrpull(struct brcmf_pu trace_brcmf_bcdchdr(pktbuf->data); h = (struct brcmf_proto_bcdc_header *)(pktbuf->data); - *ifidx = BCDC_GET_IF_IDX(h); - if (*ifidx >= BRCMF_MAX_IFS) { - brcmf_err("rx data ifnum out of range (%d)\n", *ifidx); + ifp = brcmf_get_ifp(drvr, BCDC_GET_IF_IDX(h)); + if (IS_ERR_OR_NULL(ifp)) { + brcmf_dbg(INFO, "no matching ifp found\n"); return -EBADE; } - /* The ifidx is the idx to map to matching netdev/ifp. When receiving - * events this is easy because it contains the bssidx which maps - * 1-on-1 to the netdev/ifp. But for data frames the ifidx is rcvd. - * bssidx 1 is used for p2p0 and no data can be received or - * transmitted on it. Therefor bssidx is ifidx + 1 if ifidx > 0 - */ - if (*ifidx) - (*ifidx)++; - if (((h->flags & BCDC_FLAG_VER_MASK) >> BCDC_FLAG_VER_SHIFT) != BCDC_PROTO_VER) { brcmf_err("%s: non-BCDC packet received, flags 0x%x\n", - brcmf_ifname(drvr, *ifidx), h->flags); + brcmf_ifname(drvr, ifp->ifidx), h->flags); return -EBADE; } if (h->flags & BCDC_FLAG_SUM_GOOD) { brcmf_dbg(BCDC, "%s: BDC rcv, good checksum, flags 0x%x\n", - brcmf_ifname(drvr, *ifidx), h->flags); + brcmf_ifname(drvr, ifp->ifidx), h->flags); pktbuf->ip_summed = CHECKSUM_UNNECESSARY; } @@ -320,12 +312,15 @@ brcmf_proto_bcdc_hdrpull(struct brcmf_pu skb_pull(pktbuf, BCDC_HEADER_LEN); if (do_fws) - brcmf_fws_hdrpull(drvr, *ifidx, h->data_offset << 2, pktbuf); + brcmf_fws_hdrpull(drvr, ifp->ifidx, h->data_offset << 2, + pktbuf); else skb_pull(pktbuf, h->data_offset << 2); if (pktbuf->len == 0) return -ENODATA; + + *ifidx = ifp->ifidx; return 0; } --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c @@ -81,6 +81,25 @@ char *brcmf_ifname(struct brcmf_pub *drv return ""; } +struct brcmf_if *brcmf_get_ifp(struct brcmf_pub *drvr, int ifidx) +{ + if (ifidx < 0 || ifidx >= BRCMF_MAX_IFS) { + brcmf_err("ifidx %d out of range\n", ifidx); + return ERR_PTR(-ERANGE); + } + + /* The ifidx is the idx to map to matching netdev/ifp. When receiving + * events this is easy because it contains the bssidx which maps + * 1-on-1 to the netdev/ifp. But for data frames the ifidx is rcvd. + * bssidx 1 is used for p2p0 and no data can be received or + * transmitted on it. Therefor bssidx is ifidx + 1 if ifidx > 0 + */ + if (ifidx) + ifidx++; + + return drvr->iflist[ifidx]; +} + static void _brcmf_set_multicast_list(struct work_struct *work) { struct brcmf_if *ifp; --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd.h +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd.h @@ -178,7 +178,7 @@ int brcmf_netdev_wait_pend8021x(struct n /* Return pointer to interface name */ char *brcmf_ifname(struct brcmf_pub *drvr, int idx); - +struct brcmf_if *brcmf_get_ifp(struct brcmf_pub *drvr, int ifidx); int brcmf_net_attach(struct brcmf_if *ifp, bool rtnl_locked); struct brcmf_if *brcmf_add_if(struct brcmf_pub *drvr, s32 bssidx, s32 ifidx, char *name, u8 *mac_addr);