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| author | Ajay Kumar Gupta <ajay.gupta@ti.com> | 2012-06-21 17:18:12 +0530 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2012-06-22 13:15:55 +0300 |
| commit | 8c778db9f01a1b6c785890b5fd83c7addfd3eb3a (patch) | |
| tree | 3a03a527f30759f951cb6887e1dbcbe1e9d6446e /drivers/usb/musb/musb_host.c | |
| parent | d7dbdb5e5fe809aa3d4c33b33943c94321dfdd06 (diff) | |
| download | linux-8c778db9f01a1b6c785890b5fd83c7addfd3eb3a.tar.gz linux-8c778db9f01a1b6c785890b5fd83c7addfd3eb3a.tar.bz2 linux-8c778db9f01a1b6c785890b5fd83c7addfd3eb3a.zip | |
usb: musb: host: release dma channels if no active io
Currently DMA channels are allocated and they remain allocated
even if there is no active data transfer. Added channel_release()
whenever there is no pending request.
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/musb/musb_host.c')
| -rw-r--r-- | drivers/usb/musb/musb_host.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index ef8d744800ac..e090c799d87b 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -375,11 +375,21 @@ static void musb_advance_schedule(struct musb *musb, struct urb *urb, */ if (list_empty(&qh->hep->urb_list)) { struct list_head *head; + struct dma_controller *dma = musb->dma_controller; - if (is_in) + if (is_in) { ep->rx_reinit = 1; - else + if (ep->rx_channel) { + dma->channel_release(ep->rx_channel); + ep->rx_channel = NULL; + } + } else { ep->tx_reinit = 1; + if (ep->tx_channel) { + dma->channel_release(ep->tx_channel); + ep->tx_channel = NULL; + } + } /* Clobber old pointers to this qh */ musb_ep_set_qh(ep, is_in, NULL); |