diff options
| author | Stephan Gerhold <stephan.gerhold@linaro.org> | 2025-02-12 12:15:35 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-03-22 12:54:19 -0700 |
| commit | 4fd9f51368a2490457e5419b41f6b6013287dccd (patch) | |
| tree | ee59fe3891d77738a9f22431c08055bac3ff32ea | |
| parent | a14be80a82c8fbb1a9ceeebd8a8cf7c2ac45c5e3 (diff) | |
net: wwan: mhi_wwan_mbim: Silence sequence number glitch errors
[ 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 <stephan.gerhold@linaro.org>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://patch.msgid.link/20250212-mhi-wwan-mbim-sequence-glitch-v1-1-503735977cbd@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/wwan/mhi_wwan_mbim.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wwan/mhi_wwan_mbim.c b/drivers/net/wwan/mhi_wwan_mbim.c index d5a9360323d2..8755c5e6a65b 100644 --- a/drivers/net/wwan/mhi_wwan_mbim.c +++ b/drivers/net/wwan/mhi_wwan_mbim.c @@ -220,7 +220,7 @@ 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); |