From: Cristian Birsan Date: Fri, 19 Feb 2016 08:11:56 +0000 (+0200) Subject: usb: musb: fix DMA for host mode X-Git-Tag: v4.14-rc1~3758^2^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4c2ba0c67394514f3f75c660c9f5d02e66a7efd4;p=platform%2Fkernel%2Flinux-rpi.git usb: musb: fix DMA for host mode Commit ac33cdb16681 ("usb: musb: Remove ifdefs for musb_host_rx in musb_host.c part5") introduces a problem setting DMA host mode. The musb_advance_schedule() is called immediately after receiving an endpoint RX interrupt without waiting for the DMA transfer to complete. As a consequence when the dma complete interrupt arrives the in_qh member of hw_ep is already null an the musb_host_rx() exits on !urb error case. Fix the done condition that advances the musb schedule. Signed-off-by: Cristian Birsan Signed-off-by: Joshua Henderson Tested-by: Ladislav Michl Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index 79d0818..58487a4 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -2003,10 +2003,8 @@ void musb_host_rx(struct musb *musb, u8 epnum) qh->offset, urb->transfer_buffer_length); - done = musb_rx_dma_in_inventra_cppi41(c, hw_ep, qh, - urb, xfer_len, - iso_err); - if (done) + if (musb_rx_dma_in_inventra_cppi41(c, hw_ep, qh, urb, + xfer_len, iso_err)) goto finish; else dev_err(musb->controller, "error: rx_dma failed\n");