From: Sonic Zhang <sonic.zhang@xxxxxxxxxx> Add some helpful notes about how the driver works around anomaly 05000450 (USB DMA Mode 1 Short Packet Data Corruption). Signed-off-by: Sonic Zhang <sonic.zhang@xxxxxxxxxx> Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxx> Signed-off-by: Cliff Cai <cliff.cai@xxxxxxxxxx> --- v3 - fix another typo in comment drivers/usb/musb/blackfin.h | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/drivers/usb/musb/blackfin.h b/drivers/usb/musb/blackfin.h index 159fdea..3e82059 100644 --- a/drivers/usb/musb/blackfin.h +++ b/drivers/usb/musb/blackfin.h @@ -14,6 +14,14 @@ * Blackfin specific definitions */ +/* + * Anomaly notes: + * 05000450 - USB DMA Mode 1 Short Packet Data Corruption: + * MUSB driver is designed to transfer buffer of N * maxpacket size + * in DMA mode 1 and leave rest data to the next transfer in DMA + * mode 0, so we never transmit a short packet in DMA mode 1. + */ + #undef DUMP_FIFO_DATA #ifdef DUMP_FIFO_DATA static void dump_fifo_data(u8 *buf, u16 len) -- 1.6.3.1 -- 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
