Simplfy xhci_submit_normal()'s logic a bit by using helper variables
and making sure that usb_pipein(pipe) is only called once.
Signed-off-by: Andrey Smirnov <andrew.smir...@gmail.com>
---
drivers/usb/host/xhci-hcd.c | 28 ++++++++++++++++------------
1 file changed, 16 insertions(+), 12 deletions(-)
diff --git a/drivers/usb/host/xhci-hcd.c b/drivers/usb/host/xhci-hcd.c
index 6a6291620..c8327c88f 100644
--- a/drivers/usb/host/xhci-hcd.c
+++ b/drivers/usb/host/xhci-hcd.c
@@ -1120,16 +1120,26 @@ static int xhci_submit_normal(struct usb_device *udev,
unsigned long pipe,
{
struct usb_host *host = udev->host;
struct xhci_hcd *xhci = to_xhci_hcd(host);
+ enum dma_data_direction dma_direction;
struct xhci_virtual_device *vdev;
struct xhci_slot_ctx *out_slot;
dma_addr_t buffer_dma;
union xhci_trb trb;
- u8 epaddr = (usb_pipein(pipe) ? USB_DIR_IN : USB_DIR_OUT) |
- usb_pipeendpoint(pipe);
- u8 epi = xhci_get_endpoint_index(epaddr, usb_pipetype(pipe));
- u32 flags;
+ u8 epaddr = usb_pipeendpoint(pipe);
+ u8 epi;
+ u32 flags = TRB_TYPE(TRB_NORMAL) | TRB_IOC;
int ret;
+ if (usb_pipein(pipe)) {
+ epaddr |= USB_DIR_IN;
+ flags |= TRB_ISP;
+ dma_direction = DMA_FROM_DEVICE;
+ } else {
+ epaddr |= USB_DIR_OUT;
+ dma_direction = DMA_TO_DEVICE;
+ }
+
+ epi = xhci_get_endpoint_index(epaddr, usb_pipetype(pipe));
vdev = xhci_find_virtdev(xhci, udev);
if (!vdev)
return -ENODEV;
@@ -1143,16 +1153,12 @@ static int xhci_submit_normal(struct usb_device *udev,
unsigned long pipe,
/* pass ownership of data buffer to device */
buffer_dma = dma_map_single(xhci->dev, buffer, length,
- usb_pipein(pipe) ?
- DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ dma_direction);
if (dma_mapping_error(xhci->dev, buffer_dma))
return -EFAULT;
/* Normal TRB */
/* FIXME: TD remainder */
- flags = TRB_TYPE(TRB_NORMAL) | TRB_IOC;
- if (usb_pipein(pipe))
- flags |= TRB_ISP;
xhci_init_event_cmd_trb(&trb,
buffer_dma,
TRB_LEN(length) | TRB_INTR_TARGET(0),
@@ -1164,9 +1170,7 @@ static int xhci_submit_normal(struct usb_device *udev,
unsigned long pipe,
/* Regain ownership of data buffer from device */
dma_unmap_single(xhci->dev, buffer_dma, length,
- usb_pipein(pipe) ?
- DMA_FROM_DEVICE : DMA_TO_DEVICE);
-
+ dma_direction);
switch (ret) {
case -COMP_SHORT_TX:
udev->status = 0;
--
2.20.1
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