On Tue, Aug 4, 2009 at 4:10 PM, Alan Stern<stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Tue, 4 Aug 2009, Praveen G K wrote: > >> >> This locks up the device completely, I am not even able to use the >> >> magic sysrq keys to determine the Program counter location. I >> >> connected the device to the debugger, but I am still not able to know >> >> where it is getting locked up. >> >> >> >> Could this be due to a corrupt fat file system? What is a possible >> >> workaround to avoid this error message? >> >> >> >> (Initially I thought that this issue was related to the bad usb cable >> >> issue I posted earlier!!) >> > >> > You should give us more complete information. Which version of Linux >> > are you running on the device? What kind of device is it? What >> > command do you use to load g_file_storage? How do you initiate the >> > file copy? And so on... >> I am using 2.6.22 kernel version on the device. I use > > What kind of device is it? Which USB peripheral driver are you using? > Does the same thing happen if you upgrade to 2.6.30? A lot of bugs > have been fixed in the last two years... I am using the musb-gadget driver for the MUSB phy. I haven't upgraded to 2.6.30 to get the changes. It runs on a ti omap3 processor. >> modprobe g_file_storage file='vfat-parition-address' removable=y stall=1 > > vfat-parition-address is a normal file, right? Yes, it is a normal file. >> Once the vfat partition is mounted on windows, I just drag and copy >> the file from windows >> to the device. This does not happen every single time. It happens at >> random intervals >> (maybe once in ten times). The device is not workable until it is >> reset completely. > > This could be caused by a bug in the peripheral driver. If you enable > debugging in the driver and send all the kernel messages to the screen > by typing Alt-SysRq-8, what do you see when the device locks up? I am not able to use the sysRq keys at all to see where it is getting blocked. I also have a debugger, but I have no luck in stopping the processor to see where the program counter is. > Alan Stern > > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
