This is to reduce the overhead of dma programming for zero byte
transmit as same can be done using pio mode.
Signed-off-by: Ajay Kumar Gupta <ajay.gu...@ti.com>
---
drivers/usb/musb/musb_gadget.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index b330ea6..841b442 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -366,7 +366,7 @@ static void txstate(struct musb *musb, struct musb_request
*req)
request_size = min_t(size_t, request->length - request->actual,
musb_ep->dma->max_len);
- use_dma = (request->dma != DMA_ADDR_INVALID);
+ use_dma = (request->dma != DMA_ADDR_INVALID && request_size);
/* MUSB_TXCSR_P_ISO is still set correctly */
--
1.7.0.4
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