2013/3/14 Larry Finger <Larry.Finger@xxxxxxxxxxxx>: > From: Iestyn C. Elfick <isedev@xxxxxxxxx> > > Intermittently, b43 will report "Out of order TX status report on DMA ring". > When this happens, the driver must be reset before communication can resume. > The cause of the problem is believed to be an error in the closed-source > firmware; however, all versions of the firmware are affected. > > This change uses the observation that the expected status is always 2 less > than the observed value, and supplies a fake status report to skip one > header/data pair. > > Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx> > Cc: Stable <stable@xxxxxxxxxxxxxxx> > --- > > Although this is a hack, it seems to work for the OP. It should not cause any > ill effects on any device that does not have the problem. > > It does need a lot more testing, particularly on systems prone to the out-of-order > status report problem. > > If anyone can think of a cleaner, less intrusive solution, please let us know. I wonder if this is hardware supporting unaligned access with full-addressing for DMA engine. Maybe it support index-based indexes for backward compatibility only, and it's somehow broken? Can we test full-addressing first? I'll try to prepare a patch for this during the weekend. -- Rafał -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
