iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

usb: gadget: pch_udc: switch over to usb_gadget_map/unmap_request()

Browse Source 
We have generic implementations for a reason, let's use them.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210325135508.70350-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2021-03-25 15:55:05 +02:00 committed by Greg Kroah-Hartman
parent 75bb93be00
commit de620c3b59
1 changed files with 6 additions and 72 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

78
drivers/usb/gadget/udc/pch_udc.c
View File

@ -383,11 +383,8 @@ MODULE_PARM_DESC(speed_fs, "true for Full speed operation");
* @td_data_last: last dma desc. of chain
* @queue: associated queue
* @dma_going: DMA in progress for request
* @dma_mapped: DMA memory mapped for request
* @dma_done: DMA completed for request
* @chain_len: chain length
* @buf: Buffer memory for align adjustment
* @dma: DMA memory for align adjustment
*/
struct pch_udc_request {
struct usb_request req;
@ -396,11 +393,8 @@ struct pch_udc_request {
struct pch_udc_data_dma_desc *td_data_last;
struct list_head queue;
unsigned dma_going:1,
dma_mapped:1,
dma_done:1;
unsigned chain_len;
void *buf;
dma_addr_t dma;
};
static inline u32 pch_udc_readl(struct pch_udc_dev *dev, unsigned long reg)
@ -1482,33 +1476,7 @@ static void complete_req(struct pch_udc_ep *ep, struct pch_udc_request *req,
status = req->req.status;
dev = ep->dev;
if (req->dma_mapped) {
if (req->dma == DMA_ADDR_INVALID) {
if (ep->in)
dma_unmap_single(&dev->pdev->dev, req->req.dma,
req->req.length,
DMA_TO_DEVICE);
else
dma_unmap_single(&dev->pdev->dev, req->req.dma,
req->req.length,
DMA_FROM_DEVICE);
req->req.dma = DMA_ADDR_INVALID;
} else {
if (ep->in)
dma_unmap_single(&dev->pdev->dev, req->dma,
req->req.length,
DMA_TO_DEVICE);
else {
dma_unmap_single(&dev->pdev->dev, req->dma,
req->req.length,
DMA_FROM_DEVICE);
memcpy(req->req.buf, req->buf, req->req.length);
}
kfree(req->buf);
req->dma = DMA_ADDR_INVALID;
}
req->dma_mapped = 0;
}
usb_gadget_unmap_request(&dev->gadget, &req->req, ep->in);
ep->halted = 1;
spin_unlock(&dev->lock);
if (!ep->in)
@ -1586,12 +1554,9 @@ static int pch_udc_create_dma_chain(struct pch_udc_ep *ep,
if (req->chain_len > 1)
pch_udc_free_dma_chain(ep->dev, req);
if (req->dma == DMA_ADDR_INVALID)
td->dataptr = req->req.dma;
else
td->dataptr = req->dma;
td->dataptr = req->req.dma;
td->status = PCH_UDC_BS_HST_BSY;
for (; ; bytes -= buf_len, ++len) {
td->status = PCH_UDC_BS_HST_BSY | min(buf_len, bytes);
if (bytes <= buf_len)
@ -1797,7 +1762,6 @@ static struct usb_request *pch_udc_alloc_request(struct usb_ep *usbep,
if (!req)
return NULL;
req->req.dma = DMA_ADDR_INVALID;
req->dma = DMA_ADDR_INVALID;
INIT_LIST_HEAD(&req->queue);
if (!ep->dev->dma_addr)
return &req->req;
@ -1880,39 +1844,9 @@ static int pch_udc_pcd_queue(struct usb_ep *usbep, struct usb_request *usbreq,
return -ESHUTDOWN;
spin_lock_irqsave(&dev->lock, iflags);
/* map the buffer for dma */
if (usbreq->length &&
((usbreq->dma == DMA_ADDR_INVALID) || !usbreq->dma)) {
if (!((unsigned long)(usbreq->buf) & 0x03)) {
if (ep->in)
usbreq->dma = dma_map_single(&dev->pdev->dev,
usbreq->buf,
usbreq->length,
DMA_TO_DEVICE);
else
usbreq->dma = dma_map_single(&dev->pdev->dev,
usbreq->buf,
usbreq->length,
DMA_FROM_DEVICE);
} else {
req->buf = kzalloc(usbreq->length, GFP_ATOMIC);
if (!req->buf) {
retval = -ENOMEM;
goto probe_end;
}
if (ep->in) {
memcpy(req->buf, usbreq->buf, usbreq->length);
req->dma = dma_map_single(&dev->pdev->dev,
req->buf,
usbreq->length,
DMA_TO_DEVICE);
} else
req->dma = dma_map_single(&dev->pdev->dev,
req->buf,
usbreq->length,
DMA_FROM_DEVICE);
}
req->dma_mapped = 1;
}
retval = usb_gadget_map_request(&dev->gadget, usbreq, ep->in);
if (retval)
goto probe_end;
if (usbreq->length > 0) {
retval = prepare_dma(ep, req, GFP_ATOMIC);
if (retval)