64 lines
2.7 KiB
Diff
64 lines
2.7 KiB
Diff
From 455f3e76cfc0d893585a5f358b9ddbe9c1e1e53b Mon Sep 17 00:00:00 2001
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From: Arend Van Spriel <arend.vanspriel@broadcom.com>
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Date: Wed, 28 Feb 2018 21:15:20 +0100
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Subject: [PATCH] brcmfmac: fix P2P_DEVICE ethernet address generation
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The firmware has a requirement that the P2P_DEVICE address should
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be different from the address of the primary interface. When not
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specified by user-space, the driver generates the MAC address for
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the P2P_DEVICE interface using the MAC address of the primary
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interface and setting the locally administered bit. However, the MAC
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address of the primary interface may already have that bit set causing
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the creation of the P2P_DEVICE interface to fail with -EBUSY. Fix this
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by using a random address instead to determine the P2P_DEVICE address.
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Cc: stable@vger.kernel.org # 3.10.y
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Reported-by: Hans de Goede <hdegoede@redhat.com>
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Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
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Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
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Reviewed-by: Franky Lin <franky.lin@broadcom.com>
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Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
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Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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---
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.../net/wireless/broadcom/brcm80211/brcmfmac/p2p.c | 24 ++++++++++------------
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1 file changed, 11 insertions(+), 13 deletions(-)
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--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c
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+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c
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@@ -462,25 +462,23 @@ static int brcmf_p2p_set_firmware(struct
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* @dev_addr: optional device address.
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*
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* P2P needs mac addresses for P2P device and interface. If no device
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- * address it specified, these are derived from the primary net device, ie.
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- * the permanent ethernet address of the device.
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+ * address it specified, these are derived from a random ethernet
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+ * address.
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*/
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static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr)
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{
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- struct brcmf_if *pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
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- bool local_admin = false;
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+ bool random_addr = false;
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- if (!dev_addr || is_zero_ether_addr(dev_addr)) {
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- dev_addr = pri_ifp->mac_addr;
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- local_admin = true;
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- }
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+ if (!dev_addr || is_zero_ether_addr(dev_addr))
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+ random_addr = true;
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- /* Generate the P2P Device Address. This consists of the device's
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- * primary MAC address with the locally administered bit set.
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+ /* Generate the P2P Device Address obtaining a random ethernet
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+ * address with the locally administered bit set.
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*/
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- memcpy(p2p->dev_addr, dev_addr, ETH_ALEN);
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- if (local_admin)
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- p2p->dev_addr[0] |= 0x02;
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+ if (random_addr)
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+ eth_random_addr(p2p->dev_addr);
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+ else
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+ memcpy(p2p->dev_addr, dev_addr, ETH_ALEN);
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/* Generate the P2P Interface Address. If the discovery and connection
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* BSSCFGs need to simultaneously co-exist, then this address must be
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