On Wed, May 08, 2013 at 02:34:36PM +0100, Josef Ahmad wrote: > From 8a4773d0c0df6fe2e816ad37fde30a2d90a1ad31 Mon Sep 17 00:00:00 2001 > From: Josef Ahmad <josef.ahmad@xxxxxxxxxxxxxxx> > Date: Fri, 19 Apr 2013 17:28:10 +0100 > Subject: [PATCH] i2c-designware: fix RX FIFO overrun > > i2c_dw_xfer_msg() pushes a number of bytes to transmit/receive > to/from the bus into the TX FIFO. > For master-rx transactions, the maximum amount of data that can be > received is calculated depending solely on TX and RX FIFO load. > > This is racy - TX FIFO may contain master-rx data yet to be > processed, which will eventually land into the RX FIFO. This > data is not taken into account and the function may request more > data than the controller is actually capable of storing. > > This patch ensures the driver takes into account the outstanding > master-rx data in TX FIFO to prevent RX FIFO overrun. > > Signed-off-by: Josef Ahmad <josef.ahmad@xxxxxxxxxxxxxxx> > Acked-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> Applied to for-current, thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
