On 06/10/2015 12:18 PM, Kishon Vijay Abraham I wrote:
No functional change. This is in preparation for handling non maxpacket
aligned transfers greater than bounce buffer size. This is basically to
avoid code duplication when using chained TRB transfers to handle
non maxpacket aligned transfers greater than bounce buffer size.
Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
---
drivers/usb/dwc3/ep0.c | 25 +++++++++++++++++--------
1 file changed, 17 insertions(+), 8 deletions(-)
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 713e46a..4998074 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
[...]
@@ -808,20 +812,24 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
}
ur = &r->request;
+ buf = ur->buf;
+ remaining_ur_length = ur->length;
length = trb->size & DWC3_TRB_SIZE_MASK;
+ maxp = ep0->endpoint.maxpacket;
+
if (dwc->ep0_bounced) {
- unsigned maxp = ep0->endpoint.maxpacket;
- unsigned transfer_size = roundup(ur->length, maxp);
+ transfer_size = roundup((ur->length - transfer_size),
+ maxp);
The innermost parens shouldn't be needed (if thay are, fix the macro instead).
[...]
@@ -941,7 +949,8 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
}
maxpacket = dep->endpoint.maxpacket;
- transfer_size = roundup(req->request.length, maxpacket);
+ transfer_size = roundup((req->request.length - transfer_size),
+ maxpacket);
Likewise.
[...]
WBR, Sergei
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