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bug fix: can_datahandler wrong return value

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can_datahandler returns an unsigned value that represent the
number of bytes actually bufffered, but the call to iob_tryadd_queue
returns a negative value when it fails so that value can't be used as
can_datahandler return value because it is interpreted as unsigned so
a big number is wrongly returned when iob_tryadd_queue fails.

The fix is just setting the return value to zero when iob_tryadd_queue
fails, reflecting the actual meaning that no bytes have been buffered.
This commit is contained in:
Javier Casas
2025-01-30 10:14:40 +01:00
committed by Alan C. Assis
parent d52ff33e78
commit 52dbfda355
1 changed files with 1 additions and 0 deletions
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net/can/can_callback.c
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@@ -234,6 +234,7 @@ uint16_t can_datahandler(FAR struct net_driver_s *dev,
else else
{ {
nerr("ERROR: Failed to queue the I/O buffer chain: %d\n", ret); nerr("ERROR: Failed to queue the I/O buffer chain: %d\n", ret);
ret = 0;
goto errout; goto errout;
} }