From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 BBEFA2D8364; Mon, 13 Apr 2026 16:39:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776098341; cv=none; b=TVHP+/vRHSF2ilc4t45OegHUFh8gT9LMqCuNTAQOkE7Kk8EeXiB5+3D3dnbqRToqjg3PVy+5ExHN9WuJK0weP2atXkZwvGJ1yaF782zcx6jAwMZ4xSv25qAtwBC/qFWjGRHlNRWTIRZxh8iCOZc2FJs/hhqBeGKVhvBsi0cWXCk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776098341; c=relaxed/simple; bh=4oJx/WYWp2BUHerg/sdNFLFUJZ137R6wOG2tAX9wXiw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Podj7a650Bq2skdvznukN05951StSGL8qp1kuIONRDgrQg2Lj8t2S1D6xkuZaRylJXcD7N7nzLl/zOiiCeadK7Q7tIUkHFnVoCOu7JHByBwDpY2351cdc0jvaHcPNFBgDJFQYjPHtnG2rQaLV12RxvZnQ2y/AOKxsr/0VIgc2dY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Zx5A5MGp; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Zx5A5MGp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 53DB7C2BCAF; Mon, 13 Apr 2026 16:39:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776098341; bh=4oJx/WYWp2BUHerg/sdNFLFUJZ137R6wOG2tAX9wXiw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Zx5A5MGpWJegbqVscg3W/dp2XiOAUiT8AqmKDbWI8xGCCAbWfo5JS4X7xFg08x4op s3e0Y+VLaeIRFi6V1D7R3gmcHqohlamGIVrEk0HEZeyvnxH92HoM83FJjWtkdS9UzR XIED5QYVcORx3I3ksbfmWAWW4KqCLL84Uk8o3Nk8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Konrad Dybcio , Mika Westerberg Subject: [PATCH 5.15 488/570] thunderbolt: Fix property read in nhi_wake_supported() Date: Mon, 13 Apr 2026 18:00:19 +0200 Message-ID: <20260413155848.736244737@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155830.386096114@linuxfoundation.org> References: <20260413155830.386096114@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org 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: Konrad Dybcio commit 73a505dc48144ec72e25874e2b2a72487b02d3bc upstream. device_property_read_foo() returns 0 on success and only then modifies 'val'. Currently, val is left uninitialized if the aforementioned function returns non-zero, making nhi_wake_supported() return true almost always (random != 0) if the property is not present in device firmware. Invert the check to make it make sense. Fixes: 3cdb9446a117 ("thunderbolt: Add support for Intel Ice Lake") Cc: stable@vger.kernel.org Signed-off-by: Konrad Dybcio Signed-off-by: Mika Westerberg Signed-off-by: Greg Kroah-Hartman --- drivers/thunderbolt/nhi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/thunderbolt/nhi.c +++ b/drivers/thunderbolt/nhi.c @@ -1002,7 +1002,7 @@ static bool nhi_wake_supported(struct pc * If power rails are sustainable for wakeup from S4 this * property is set by the BIOS. */ - if (device_property_read_u8(&pdev->dev, "WAKE_SUPPORTED", &val)) + if (!device_property_read_u8(&pdev->dev, "WAKE_SUPPORTED", &val)) return !!val; return true;