tree 5f0d7a32f873024fb3bdbcedc7f2730d810dab84
parent 06978a863b4d7fd185339c89042c7e4374cf0b43
author Martin Hundebøll <martin@geanix.com> 1714046263 +0200
committer Denis Kenzior <denkenz@gmail.com> 1714076525 -0500

atmodem: fix detection of ATD*99 for non-muxed serial ports

The gprs context probe function has logic to detect whether CGDATA is
supported by the modem, or if ATD*99 should be used instead. However, it
seems like this logic was wrongly placed after registering for CGEV
notification, which did an early return in case the passed chat did not
have a slave.

Thus the ATD*99 detection was skipped for USB modems using separate
"virtual" serial ports for command and data channels (i.e. ttyUSB0 for
AT and ttyUSB1 for PPP).

Fix USB modem case by moving the check for a slave chat (and the
registraion for CGEV notifications) to after the CGDATA check, which
lets the ATD*99 check run uncodionally.