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Commit 9ca186c5 authored by Mayank Rana's avatar Mayank Rana
Browse files

dwc3: Fix USB TRB ring initialization in BAM2BAM case 



With unexpected TRB ring initialization USB BAM2BAM functionality
stalls. Hence use trb_enqueue as index to get TRB from TRB pool
to initialize TRB ring for BAM2BAM case.

CRs-Fixed: 2064160
Change-Id: I1cfbb9985fa5c9f1c56f2636e0e2bf7e7f3bec73
Signed-off-by: default avatarMayank Rana <mrana@codeaurora.org>
parent e13b3810

drivers/usb/dwc3/dwc3-msm.c

+4 −4
Original line number Diff line number Diff line
@@ -617,8 +617,8 @@ static int __dwc3_msm_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 
	list_add_tail(&req->list, &dep->started_list);



	/* First, prepare a normal TRB, point to the fake buffer */

	trb = &dep->trb_pool[dep->trb_enqueue & DWC3_TRB_NUM];

	dep->trb_enqueue++;

	trb = &dep->trb_pool[dep->trb_enqueue];

	dwc3_ep_inc_enq(dep);

	memset(trb, 0, sizeof(*trb));



	req->trb = trb;
@@ -629,8 +629,8 @@ static int __dwc3_msm_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 
	req->trb_dma = dwc3_trb_dma_offset(dep, trb);



	/* Second, prepare a Link TRB that points to the first TRB*/

	trb_link = &dep->trb_pool[dep->trb_enqueue & DWC3_TRB_NUM];

	dep->trb_enqueue++;

	trb_link = &dep->trb_pool[dep->trb_enqueue];

	dwc3_ep_inc_enq(dep);

	memset(trb_link, 0, sizeof(*trb_link));



	trb_link->bpl = lower_32_bits(req->trb_dma);

drivers/usb/dwc3/gadget.c

+2 −2
Original line number Diff line number Diff line
@@ -164,12 +164,12 @@ static void dwc3_ep_inc_trb(u8 *index) 
		*index = 0;

}



static void dwc3_ep_inc_enq(struct dwc3_ep *dep)

void dwc3_ep_inc_enq(struct dwc3_ep *dep)

{

	dwc3_ep_inc_trb(&dep->trb_enqueue);

}



static void dwc3_ep_inc_deq(struct dwc3_ep *dep)

void dwc3_ep_inc_deq(struct dwc3_ep *dep)

{

	dwc3_ep_inc_trb(&dep->trb_dequeue);

}

drivers/usb/dwc3/gadget.h

+2 −0
Original line number Diff line number Diff line
@@ -98,6 +98,8 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol); 
void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force);

irqreturn_t dwc3_interrupt(int irq, void *_dwc);

void dwc3_bh_work(struct work_struct *w);

void dwc3_ep_inc_enq(struct dwc3_ep *dep);

void dwc3_ep_inc_deq(struct dwc3_ep *dep);



static inline dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep,

		struct dwc3_trb *trb)