MUSB problem
I'm running 3.3.0 on an OMAP DM3730, with SMSC75xx connected via the MUSB device. I get this error continually although the device (and network channel) seem happy:
musb_ep_program 835: broken !rx_reinit, ep2 csr a200
What does it mean? How do I fix it (i.e. keep it from happening)?
Note: disabling DMA isn't really an option as the whole point of the SMSC75xx is to get gigabit ethernet and I doubt that's possible without DMA :-)
Thanks for any pointers/ideas
Signature · 4 lines
------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------
Quoted 5 lines · Gary Thomas
I'm running 3.3.0 on an OMAP DM3730, with SMSC75xx connected via the MUSB device. I get this error continually although the device (and network channel) seem happy:
musb_ep_program835: broken !rx_reinit, ep2 csr a200
Quoted 8 lines
What does it mean? How do I fix it (i.e. keep it from happening)?
Note: disabling DMA isn't really an option as the whole point of the SMSC75xx is to get gigabit ethernet and I doubt that's possible without DMA :-)
Thanks for any pointers/ideas
Actually, I was too hasty saying that this worked even with this error. I can ping out from my board, but any higher level of traffic, e.g. SSH into the box, falls over :-(
The problems vanish when I disable MUSB DMA.
What gives?
Signature · 4 lines
------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------
Quoted 9 lines
Actually, I was too hasty saying that this worked even with this error. I can ping out from my board, but any higher level of traffic, e.g. SSH into the box, falls over
The problems vanish when I disable MUSB DMA.
What gives?
I'm also seeing this on a variety of kernels, from 2.6.34 to 3.3.0. I must explicitly set musb_hdrc.use_dma=n for the smsc95xx card to function.
The latest kernel I have tested this against is:
Linux WC-11003A 3.3.0 #1 PREEMPT Fri May 11 18:05:35 PDT 2012 armv7l GNU/Linux