On 2/21/2000 2:53 AM Bob Edwards Robert.Edwards@anu.edu.au wrote: > - ntulip_transmit doesn't need to stop and start the transmitter for > each frame Be very careful here. The DECchip 21041 PCI Ethernet LAN Controller Hardware Reference Manual states that "Writing to either CSR3 or CSR4 is permitted only when its respective process is in the stopped state." I did some testing and debugging, and this turned out to be what was causing the LC82C168 based card (NetGear FA310TX) to hang using your patch. ntulip_transmit stops TX in order to write to CSR4. It appears some cards don't mind if you touch this register while the TX process is running, but since there is no conditionalization in the ntulip_transmit routing, it is unsafe. Please pass this along to Paul Mackerras of Linuxcare's OZLabs. Regards, Marty --- Name: Martin D. Connor US Mail: Entity Cyber, Inc.; P.O. Box 391827; Cambridge, MA 02139; USA Voice: (617) 491-6935, Fax: (617) 491-7046 Email: email@example.com Web: http://www.thinguin.org/ =========================================================================== This Mail was sent to netboot mailing list by: Marty Connor <firstname.lastname@example.org> To get help about this list, send a mail with 'help' as the only string in it's body to email@example.com. If you have problems with this list, send a mail to firstname.lastname@example.org.
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