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 0CE4F207E14; Tue, 8 Apr 2025 11:41:12 +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=1744112472; cv=none; b=Bhmi6+e4aCAyvBJJwU/v4R7BWiv4HtNQ7GyqGk/vQUpkQuoPRR+CLolBFmwrmfSiQX00t244uw7AXhinyLR7vFRi/OExL+S3z2OnRXRS6rEn7tntMF2MMwNEZjsVB7V+us7ZCXA7QWlIweVYuYa2ybXkCVJlSIIlWekTPQzhjUo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744112472; c=relaxed/simple; bh=LL/mL+z9PfeVTGi4C+sc8uuqhdos4ZgkD//439AXrY0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=I5b+8BgC4k4OD9WLZsdeCDURtA5A8NVh00ulJ02h2TUs7UVMqvRcRsjyRMWq6wHQdDSM/bwIE+hf6/bY003MahkL6nEuq2F8lnmHC3gtV9QACKHTD125ohk4v+STGSOt9DWUwDgGovehPT7xBVnFXm55b59r5etJjcc7l3vWCaE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Bkmy7FVB; 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="Bkmy7FVB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 65BAFC4CEE5; Tue, 8 Apr 2025 11:41:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1744112471; bh=LL/mL+z9PfeVTGi4C+sc8uuqhdos4ZgkD//439AXrY0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Bkmy7FVBAv103lXm2rgW2r0pFZWHqHp/cs9fWxQ1HmYsQYtdm+07wBXnwureFGJF3 w1rKbS8ZULqoxE+kL/rwHo1WQ+iTHm6wHcVygBuVnkQwQc1VatnfKLPUfOEK3lexdb nq7ce80RBSuJOlOCxiFkM8lybIj8TK1EeqD7rDkE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stephan Gerhold , Loic Poulain , Manivannan Sadhasivam , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.15 041/279] net: wwan: mhi_wwan_mbim: Silence sequence number glitch errors Date: Tue, 8 Apr 2025 12:47:04 +0200 Message-ID: <20250408104827.488540323@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250408104826.319283234@linuxfoundation.org> References: <20250408104826.319283234@linuxfoundation.org> User-Agent: quilt/0.68 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: Stephan Gerhold [ Upstream commit 0d1fac6d26aff5df21bb4ec980d9b7a11c410b96 ] When using the Qualcomm X55 modem on the ThinkPad X13s, the kernel log is constantly being filled with errors related to a "sequence number glitch", e.g.: [ 1903.284538] sequence number glitch prev=16 curr=0 [ 1913.812205] sequence number glitch prev=50 curr=0 [ 1923.698219] sequence number glitch prev=142 curr=0 [ 2029.248276] sequence number glitch prev=1555 curr=0 [ 2046.333059] sequence number glitch prev=70 curr=0 [ 2076.520067] sequence number glitch prev=272 curr=0 [ 2158.704202] sequence number glitch prev=2655 curr=0 [ 2218.530776] sequence number glitch prev=2349 curr=0 [ 2225.579092] sequence number glitch prev=6 curr=0 Internet connectivity is working fine, so this error seems harmless. It looks like modem does not preserve the sequence number when entering low power state; the amount of errors depends on how actively the modem is being used. A similar issue has also been seen on USB-based MBIM modems [1]. However, in cdc_ncm.c the "sequence number glitch" message is a debug message instead of an error. Apply the same to the mhi_wwan_mbim.c driver to silence these errors when using the modem. [1]: https://lists.freedesktop.org/archives/libmbim-devel/2016-November/000781.html Signed-off-by: Stephan Gerhold Reviewed-by: Loic Poulain Acked-by: Manivannan Sadhasivam Link: https://patch.msgid.link/20250212-mhi-wwan-mbim-sequence-glitch-v1-1-503735977cbd@linaro.org Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/wwan/mhi_wwan_mbim.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wwan/mhi_wwan_mbim.c b/drivers/net/wwan/mhi_wwan_mbim.c index ef70bb7c88ad6..43c20deab3189 100644 --- a/drivers/net/wwan/mhi_wwan_mbim.c +++ b/drivers/net/wwan/mhi_wwan_mbim.c @@ -209,7 +209,7 @@ static int mbim_rx_verify_nth16(struct mhi_mbim_context *mbim, struct sk_buff *s if (mbim->rx_seq + 1 != le16_to_cpu(nth16->wSequence) && (mbim->rx_seq || le16_to_cpu(nth16->wSequence)) && !(mbim->rx_seq == 0xffff && !le16_to_cpu(nth16->wSequence))) { - net_err_ratelimited("sequence number glitch prev=%d curr=%d\n", + net_dbg_ratelimited("sequence number glitch prev=%d curr=%d\n", mbim->rx_seq, le16_to_cpu(nth16->wSequence)); } mbim->rx_seq = le16_to_cpu(nth16->wSequence); -- 2.39.5