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usb: mtu3: add tracepoints to help debug

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This patch implements a few initial tracepoints for the
mtu3 driver. More traces can be added as necessary in order
to ease the task of debugging.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun
2019-03-21 10:53:48 +08:00
committed by Greg Kroah-Hartman
parent 4aab6ad24a
commit 83374e035b
9 changed files with 347 additions and 1 deletions
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14
drivers/usb/mtu3/mtu3_gadget.c
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@@ -8,6 +8,7 @@
*/
#include "mtu3.h"
#include "mtu3_trace.h"
void mtu3_req_complete(struct mtu3_ep *mep,
struct usb_request *req, int status)
@@ -25,6 +26,8 @@ __acquires(mep->mtu->lock)
mtu = mreq->mtu;
mep->busy = 1;
trace_mtu3_req_complete(mreq);
spin_unlock(&mtu->lock);
/* ep0 makes use of PIO, needn't unmap it */
@@ -201,6 +204,7 @@ error:
spin_unlock_irqrestore(&mtu->lock, flags);
dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep);
trace_mtu3_gadget_ep_enable(mep);
return ret;
}
@@ -212,6 +216,7 @@ static int mtu3_gadget_ep_disable(struct usb_ep *ep)
unsigned long flags;
dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name);
trace_mtu3_gadget_ep_disable(mep);
if (!(mep->flags & MTU3_EP_ENABLED)) {
dev_warn(mtu->dev, "%s is already disabled\n", mep->name);
@@ -242,13 +247,17 @@ struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
mreq->request.dma = DMA_ADDR_INVALID;
mreq->epnum = mep->epnum;
mreq->mep = mep;
trace_mtu3_alloc_request(mreq);
return &mreq->request;
}
void mtu3_free_request(struct usb_ep *ep, struct usb_request *req)
{
kfree(to_mtu3_request(req));
struct mtu3_request *mreq = to_mtu3_request(req);
trace_mtu3_free_request(mreq);
kfree(mreq);
}
static int mtu3_gadget_queue(struct usb_ep *ep,
@@ -316,6 +325,7 @@ static int mtu3_gadget_queue(struct usb_ep *ep,
error:
spin_unlock_irqrestore(&mtu->lock, flags);
trace_mtu3_gadget_queue(mreq);
return ret;
}
@@ -333,6 +343,7 @@ static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req)
return -EINVAL;
dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req);
trace_mtu3_gadget_dequeue(mreq);
spin_lock_irqsave(&mtu->lock, flags);
@@ -403,6 +414,7 @@ static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value)
done:
spin_unlock_irqrestore(&mtu->lock, flags);
trace_mtu3_gadget_ep_set_halt(mep);
return ret;
}