diff options
| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2011-05-07 19:44:13 +0400 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2011-05-13 14:34:07 +0300 |
| commit | c51e36dc11e44aa960744ec1c36fb2ab8d68b218 (patch) | |
| tree | ee8aa49d128d99e31e21fc3124efad5219276b9b /drivers/usb/musb | |
| parent | 981430a1704123b569865997bdde4f1de1afca7e (diff) | |
usb: musb: host: remove duplicate check in musb_ep_program()
musb_ep_program() contains obviously duplicate check for 'dma_channel' in its
IN/receive path -- removing it allows to save one level of indentation. While
at it, improve the comment style...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/musb')
| -rw-r--r-- | drivers/usb/musb/musb_host.c | 49 |
1 files changed, 22 insertions, 27 deletions
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index 75aa01e0036..7295e316bdf 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -837,33 +837,28 @@ static void musb_ep_program(struct musb *musb, u8 epnum, /* kick things off */ if ((is_cppi_enabled() || tusb_dma_omap()) && dma_channel) { - /* candidate for DMA */ - if (dma_channel) { - dma_channel->actual_len = 0L; - qh->segsize = len; - - /* AUTOREQ is in a DMA register */ - musb_writew(hw_ep->regs, MUSB_RXCSR, csr); - csr = musb_readw(hw_ep->regs, - MUSB_RXCSR); - - /* unless caller treats short rx transfers as - * errors, we dare not queue multiple transfers. - */ - dma_ok = dma_controller->channel_program( - dma_channel, packet_sz, - !(urb->transfer_flags - & URB_SHORT_NOT_OK), - urb->transfer_dma + offset, - qh->segsize); - if (!dma_ok) { - dma_controller->channel_release( - dma_channel); - hw_ep->rx_channel = NULL; - dma_channel = NULL; - } else - csr |= MUSB_RXCSR_DMAENAB; - } + /* Candidate for DMA */ + dma_channel->actual_len = 0L; + qh->segsize = len; + + /* AUTOREQ is in a DMA register */ + musb_writew(hw_ep->regs, MUSB_RXCSR, csr); + csr = musb_readw(hw_ep->regs, MUSB_RXCSR); + + /* + * Unless caller treats short RX transfers as + * errors, we dare not queue multiple transfers. + */ + dma_ok = dma_controller->channel_program(dma_channel, + packet_sz, !(urb->transfer_flags & + URB_SHORT_NOT_OK), + urb->transfer_dma + offset, + qh->segsize); + if (!dma_ok) { + dma_controller->channel_release(dma_channel); + hw_ep->rx_channel = dma_channel = NULL; + } else + csr |= MUSB_RXCSR_DMAENAB; } csr |= MUSB_RXCSR_H_REQPKT; |