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Date:   Tue, 12 May 2020 13:53:20 +0200
From:   Gregory CLEMENT <>
To:     Greg Kroah-Hartman <>,
        Jiri Slaby <>,
Cc:     Thomas Petazzoni <>,
        Gregory CLEMENT <>
Subject: [PATCH v2 0/3] TTY improve n_gsm support


This series is the second version of patch improving n_gms support
especially with TELIT LE910. However the fix should benefit to any
modem supporting cmux.

The first patch is just about improving debugging output.

The second one removes a tty optimization which make the LE910 hang.

The last one fixes an issue observed on the LE910 but should benefit
to all the modem. We observed that pretty quickly the transfer done
using the virtual tty were blocked. We found that it was due of a
wakeup to the real tty. Without this fix, the real tty wait for

Thanks to Jiri Slaby for the review.

 v1 -> v2:
 - don't replace the pr_info by pr_debug
 - remove the superfluous printk("\n");
 - use --follow option with git log to find the original commit to fix
 - use tty_port_tty_wakeup
 - use 'for' loop instead of 'while'


Gregory CLEMENT (3):
  tty: n_gsm: Improve debug output
  tty: n_gsm: Fix SOF skipping
  tty: n_gsm: Fix waking up upper tty layer when room available

 drivers/tty/n_gsm.c | 48 +++++++++++++++++++++++----------------------
 1 file changed, 25 insertions(+), 23 deletions(-)


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