On Mon, Feb 16, 2009 at 10:21 AM, Oliver Neukum <oliver@xxxxxxxxxx> wrote: >> tests seemed to verify this claim... as sending LED commands >> GFP_KERNEL while holding the mutex resulted in BUGs (scheduling while >> atomic) in dmesg. Switching those GFP_KERNELs to GFP_ATOMICs >> eliminated that particular BUG. > > Please post that BUG. > I switched back to GFP_KERNEL on the functions in question. After further testing, I have determined that the BUG only occurs on my Ubuntu (2.6.27) system, and only when using the rumble function. I am unable to reproduce the BUG on my Arch (2.6.28) system, so it is either an artifact of some patch to this kernel, or it got fixed somewhere between 2.6.27 and 2.6.28. Based on this analysis, and (more importantly) an inability to reproduce the behavior on a more vanilla kernel, I have removed the comments about it from the TODO section of the driver. It isn't a true kernel bug at least with a more recent stable kernel. Mike -- Mike Murphy Ph.D. Candidate and NSF Graduate Research Fellow Clemson University School of Computing 120 McAdams Hall Clemson, SC 29634-0974 USA Tel: +1 864.656.2838 Fax: +1 864.656.0145 http://cirg.cs.clemson.edu/~mamurph -- 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
