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drivers: modem: sara-r4: Add sanity timeout for @ prompt

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This wait on @ prompt was added in
fa3d586483.
The situation were the @ prompt is never received should not occurs,
however it's definitively safer to catch it instead of having a
deadlock.

Signed-off-by: Xavier Chapron <xavier.chapron@stimio.fr>
This commit is contained in:
Xavier Chapron 2021-01-22 09:21:12 +01:00 • committed by Anas Nashif
commit 47da2bed27
1 changed files with 6 additions and 1 deletions
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7
drivers/modem/ublox-sara-r4.c
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@ -378,7 +378,12 @@ static ssize_t send_socket_data(void *obj,
}
/* Wait for prompt '@' */
k_sem_take(&mdata.sem_prompt, K_FOREVER);
ret = k_sem_take(&mdata.sem_prompt, K_SECONDS(1));
if (ret != 0) {
ret = -ETIMEDOUT;
LOG_ERR("No @ prompt received");
goto exit;
}
/*
* The AT commands manual requires a 50 ms wait