This is the mail archive of the
ecos-discuss@sources.redhat.com
mailing list for the eCos project.
MPC860: quicc_smc_serial driver *issue*
- From: nprasad3 at gmu dot edu
- To: ecos-discuss at sources dot redhat dot com
- Date: Wed, 07 Jan 2004 13:22:25 -0500
- Subject: [ECOS] MPC860: quicc_smc_serial driver *issue*
The driver is designed to operate in polling mode when buf_size is set to 0, however putc does not check for the outbound buffer length.
Issue
-------
1. putc starts filling in the buffer (after the buffer is full, txbd->length is beyond smc_chan->txsize) and flush routine keeps getting called.
2. txbd->length gets reset only in the interrupt handler (*which was never set because outbound buffer length is 0*) and hence this never takes place.
I've made a change to putc to check and use 1 buffer for polling mode.
Kindly please let me know how this patch can make it into the code so that I don't have to patch it the next time, I get the source out from cvs. All this is based on the assumption that the driver is intended to be used in polling mode by making bufsize=0.
Please let me know if I am missing something.
Thanks
Nirmal
--
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss