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authorYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>2014-08-22 15:14:10 +0400
committerFelipe Balbi <balbi@ti.com>2014-09-03 18:15:58 +0400
commitc0ed8b23b257a84d103764cdbd490ee5e2749da3 (patch)
tree45629df6db135cf0ceca8362f42256d4dbc57f7f /drivers/usb/renesas_usbhs
parentc4d8199ba1a7aa390b06db23f4532e2c1875aefb (diff)
downloadlinux-c0ed8b23b257a84d103764cdbd490ee5e2749da3.tar.xz
usb: renesas_usbhs: fix the condition of is_done in usbhsf_dma_push_done
This patch fixes the condition of is_done in usbhsf_dma_push_done(). This function will be called after a transmission finished by DMAC. So, the function should check if the transmission packet is short packet or not. Also the function should call try_run to send the zero packet by the pio handler if the "*is_done" is not set. Otherwize, the transaction will not finish if a gadget driver sets the "zero" flag in a transmission. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/renesas_usbhs')
-rw-r--r--drivers/usb/renesas_usbhs/fifo.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index 3efece3c72a3..1564829951c0 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -889,16 +889,29 @@ usbhsf_pio_prepare_push:
static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done)
{
struct usbhs_pipe *pipe = pkt->pipe;
+ int is_short = pkt->trans % usbhs_pipe_get_maxpacket(pipe);
- pkt->actual = pkt->trans;
+ pkt->actual += pkt->trans;
+
+ if (pkt->actual < pkt->length)
+ *is_done = 0; /* there are remainder data */
+ else if (is_short)
+ *is_done = 1; /* short packet */
+ else
+ *is_done = !pkt->zero; /* send zero packet? */
- *is_done = !pkt->zero; /* send zero packet ? */
usbhs_pipe_running(pipe, !*is_done);
usbhsf_dma_stop(pipe, pipe->fifo);
usbhsf_dma_unmap(pkt);
usbhsf_fifo_unselect(pipe, pipe->fifo);
+ if (!*is_done) {
+ /* change handler to PIO */
+ pkt->handler = &usbhs_fifo_pio_push_handler;
+ return pkt->handler->try_run(pkt, is_done);
+ }
+
return 0;
}