From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A1B943D75A4; Tue, 16 Jun 2026 18:27:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781634441; cv=none; b=o97EyVaTrWCYRmJCOuc+Df+5CKm944I4pARw488EZsdL6MBUHqN/xpxRS9TuQPn8Z0dMwwq6vhV6OwfFutTtwWSZ5TDAGFRY5f07P1NnAKmseNnGUwE/WBFEwVznHCxFQUNrXih0O9ZGWOvVL6QXbtcE7h7YRIc7OJJATnTVrPU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781634441; c=relaxed/simple; bh=qr+BawgZD0dzwDKmF9NNSw7HheRAswcSzP2tFhxz2Qc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Rpb1OiZBuQoqnljUVVFqc5SbRXtMqB4UOpY4Fuxg6Zc7bMMR03sULq1ozmFSp48kQPCFkCmwxzG1Gsa/Ezfu5AICLKq39JalmNE9938yXhURMCHfLG3LJQ7niKV/77CF+03+72crDo8EFa26ZfTxuM3uv8NhsX/6SUCftey7MOs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=QlwIWAxu; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="QlwIWAxu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A4E221F000E9; Tue, 16 Jun 2026 18:27:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781634440; bh=QY5Aj3w2m3Y9xvomY7llchmjh7ScoypKW2N60NKuGaw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=QlwIWAxuiPdJkee+d7OVHvZUDKDIQHXwlaGnU2T4jh937+FicAea9aXVnKtlCD7Xs FH7rriZGWb1DlUI7fS8vaQS5qdGGijq65ijygXxgAETP64b8CqrudO+rdhSSGlOoZp 0CmiaSQ7jlVXHnircWF6OV5x5IqgbbHMvmP7Et+I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Oliver Neukum , Sean Young , Hans Verkuil , Sasha Levin Subject: [PATCH 5.15 266/411] media: rc: ttusbir: respect DMA coherency rules Date: Tue, 16 Jun 2026 20:28:24 +0530 Message-ID: <20260616145115.210727047@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145100.376842714@linuxfoundation.org> References: <20260616145100.376842714@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Oliver Neukum [ Upstream commit 50acaad3d202c064779db8dc3d010007347f59c7 ] Buffers must not share a cache line with other data structures. Allocate separately. Fixes: 0938069fa0897 ("[media] rc: Add support for the TechnoTrend USB IR Receiver") Cc: stable@vger.kernel.org Signed-off-by: Oliver Neukum Signed-off-by: Sean Young Signed-off-by: Hans Verkuil [ kept kzalloc(sizeof(*tt), GFP_KERNEL) instead of kzalloc_obj() ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/media/rc/ttusbir.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) --- a/drivers/media/rc/ttusbir.c +++ b/drivers/media/rc/ttusbir.c @@ -32,7 +32,7 @@ struct ttusbir { struct led_classdev led; struct urb *bulk_urb; - uint8_t bulk_buffer[5]; + u8 *bulk_buffer; int bulk_out_endp, iso_in_endp; bool led_on, is_led_on; atomic_t led_complete; @@ -188,13 +188,16 @@ static int ttusbir_probe(struct usb_inte struct rc_dev *rc; int i, j, ret; int altsetting = -1; + u8 *buffer; tt = kzalloc(sizeof(*tt), GFP_KERNEL); + buffer = kzalloc(5, GFP_KERNEL); rc = rc_allocate_device(RC_DRIVER_IR_RAW); - if (!tt || !rc) { + if (!tt || !rc || buffer) { ret = -ENOMEM; goto out; } + tt->bulk_buffer = buffer; /* find the correct alt setting */ for (i = 0; i < intf->num_altsetting && altsetting == -1; i++) { @@ -283,8 +286,8 @@ static int ttusbir_probe(struct usb_inte tt->bulk_buffer[3] = 0x01; usb_fill_bulk_urb(tt->bulk_urb, tt->udev, usb_sndbulkpipe(tt->udev, - tt->bulk_out_endp), tt->bulk_buffer, sizeof(tt->bulk_buffer), - ttusbir_bulk_complete, tt); + tt->bulk_out_endp), tt->bulk_buffer, 5, + ttusbir_bulk_complete, tt); tt->led.name = "ttusbir:green:power"; tt->led.default_trigger = "rc-feedback"; @@ -353,6 +356,7 @@ out: kfree(tt); } rc_free_device(rc); + kfree(buffer); return ret; } @@ -375,6 +379,7 @@ static void ttusbir_disconnect(struct us } usb_kill_urb(tt->bulk_urb); usb_free_urb(tt->bulk_urb); + kfree(tt->bulk_buffer); usb_set_intfdata(intf, NULL); kfree(tt); }