From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794585393; b=SOfj2rgxRsIeFIzOIWrb/HcySfysW/l6xFgHLxZHdOFvJTdWs1WfkueM9WHhPY2xE+ve GSelaYZvhla9EwMQ+oFOtbsD8YzBWgT5HXQCEF6+VvHEH96aekUAGsMp3Sc7WEtkfsAVh /tdokFo3ePNMWpPUVWExqip8r8NubcgOZpc3ST9vhfU3pN0n2iBOEeqWefuBConj2CRwP L+MtF4GxWyQA+FGk4ODtfFSfmCdrUhNrsDQvoe1GihRfGAo7ISM/VBfwg8aSwroSFkvnN cnGbTR3LN2UfMl+jRuOtFGwH2ybrnChdjyM+K5+3eqpr3jFD7ICWitoQQDFlcWf8bKQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794585393; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=6zHs89ji0aKaVDweHDK2wuIuIjEP9bj7SRQbnNV3kvU=; b=JPm1P8fpKKO933FcJAOAX0aDeRLFekqZuGL/07kXMr5t/5ShZaho+cxwIJq2Rk409ihQ O/19UpB17NQsKaKOIE0/hUt9ElADSxkaPpkT2xjEWYJOoRbsOZ9O//tE/HM0MEkr1zrus YO9Xx9lbBgbcQ0NW4sHuPWYa5kyxvVp8BY2uHTcH5wmTY25qCHix9P92rxyylx3A05Nbl z9IKholJ5ykdXI8CsCMCIUZ2NMZZy0ELxN8u4oi86mcZLHVwZJ9LpGfK1MT8FEtZLnf0g iAuFHX+iCt6kKjSslOjwLhUqg3+tZKbGLJWMXRgP53X45a6lJv1jiM7OrMbNnWrDJ/Q== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=q5+3tplG; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9E6B86070FE4; Fri, 13 Nov 2026 15:56:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=q5+3tplG Received: by smtp.kernel.org (Postfix) with ESMTPSA id 48AFC1F000D0; Fri, 13 Nov 2026 15:56:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794585393; bh=6zHs89ji0aKaVDweHDK2wuIuIjEP9bj7SRQbnNV3kvU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=q5+3tplGoy4tvChkZQVpDMkUlnvHmatDPUaUWWYguwQ0omdG+Ab0zcBHyAaFqiNwe TlLW4qPVlasSmFrEUNvbSTUZ5JMJn4CnjWbPBfDcNk5sYHly8YZ2TEvS8/qrFJnWk4 0fMpoeJsZQtSnV+ExeqNco2Yx+PJEJAssEGp1LKI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jason Perlow , Aditya Garg , Arend van Spriel , Johannes Berg , Sasha Levin Subject: [PATCH 7.3 065/507] wifi: brcmfmac: map msgbuf RX packet IDs bidirectional Date: Fri, 13 Nov 2026 10:46:09 -0500 Message-ID: <20261113153755.740970246@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261113153753.358973689@linuxfoundation.org> References: <20261113153753.358973689@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.3-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jason Perlow [ Upstream commit 7ed5dce55fa8393972b1bf2bf5af1c818c5e7dc2 ] Commit f0ba5fd51ff2 ("wifi: brcmfmac: Set DMA direction for msgbuf packet IDs") maps the RX packet ID buffers DMA_FROM_DEVICE. The BCM4364 firmware also reads posted RX buffers, so with VT-d translation enabled every such read faults ("PTE Read access is not set") and the firmware crashes and resets in a loop. Map the RX pool DMA_BIDIRECTIONAL again, as before that commit. TX keeps DMA_TO_DEVICE. Fixes: f0ba5fd51ff2 ("wifi: brcmfmac: Set DMA direction for msgbuf packet IDs") Cc: stable@vger.kernel.org Signed-off-by: Jason Perlow Signed-off-by: Aditya Garg Acked-by: Arend van Spriel Link: https://patch.msgid.link/20261021172238.10004-1-aditya.garg@linux.dev Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c index 069ba7016654e..ff47d4827722e 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c @@ -1639,7 +1639,7 @@ int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr) if (!msgbuf->tx_pktids) goto fail; msgbuf->rx_pktids = brcmf_msgbuf_init_pktids(NR_RX_PKTIDS, - DMA_FROM_DEVICE); + DMA_BIDIRECTIONAL); if (!msgbuf->rx_pktids) goto fail; -- 2.53.0