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authorStephan Gerhold <[email protected]>2025-02-12 11:15:35 +0000
committerJakub Kicinski <[email protected]>2025-02-14 21:39:55 +0000
commit0d1fac6d26aff5df21bb4ec980d9b7a11c410b96 (patch)
tree92592a5c74b7d292e7936f3ce7a121bf5209bb6f /tools/testing/selftests/bpf/prog_tests/sockmap_basic.c
parentgve: Update MAINTAINERS (diff)
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net: wwan: mhi_wwan_mbim: Silence sequence number glitch errors
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 <[email protected]> Reviewed-by: Loic Poulain <[email protected]> Acked-by: Manivannan Sadhasivam <[email protected]> Link: https://patch.msgid.link/20250212-mhi-wwan-mbim-sequence-glitch-v1-1-503735977cbd@linaro.org Signed-off-by: Jakub Kicinski <[email protected]>
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