WARNING: at drivers/usb/musb/musb_host.c:125 musb_h_tx_flush_fifo+0x35/0x5c()
what's your kernel version? and what's your MUSB RTL version? I encourtered same problem also, and it seems the kernel's MUSB code is not identical to my MUSB core, e.g. when you flush the txfifo, for my MUSB, you must clear the MUSB_TXCSR_TXPKTRDY at same time. Also you can describle your problem clearly and post a request in linux usb maillist. here is the code: http://lxr.linux.no/linux+v3.12/drivers/usb/musb/musb_host.c On Thursday, November 14, 2013 2:51:39 AM UTC+8, Danny Darko wrote: > > I've been trying to troubleshoot an issue, but lacking experience working > in the kernel, and not being able to find this same issue discussed > elsewhere, I could use some help. > > Basically, I have a USB communication class device interface with my BBB > that only works once between booting. I'll power up, send a character > command to the device, and get the expected response back ... but if I send > the same command again, fgets never returns a non-null string. If I reboot > the BBB, I can send the command and get the expected response back, but, > again, only once. > > Other USB issues I've seen discuss power, and my device is bus-powered, > but I don't think it's a power issue, as I found the following in dmesg, > which doesn't seem to relate to power (this message appears after the first > time sending a command to the device, and every time thereafter): > > WARNING: at drivers/usb/musb/musb_host.c:125 > musb_h_tx_flush_fifo+0x35/0x5c() > > Any ideas on how to troubleshoot this? Again, I have no experience working > in the kernel, so I'm at a loss. My only idea was to examine the code > throwing the warning, but, mysteriously, I searched the entire file system > (find / musb_host.c) and couldn't locate musb_host.c ... how could that > file be throwing the warning if it seemingly doesn't exist on my file > system? > > This is a company project and we're willing to pay for a solution at this > point. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
