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dwc3-msm: Acquire lock for USB GSI endpoint related operations

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There is possibility where any control request for USB GSI endpint
e.g. CLEAR_FEATURE racing against USB GSI endpoint operation. Hence
acquire lock for USB GSI endpoint related operations which involves
sending required USB commands for the endpoint operation.

Change-Id: If14af809c443e12bd64e54910602c4aeeca4f0df
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
This commit is contained in:
Mayank Rana 2016-09-30 18:41:17 -07:00 • committed by Hemant Kumar
parent 0b3886773c
commit 79bed203c1
1 changed files with 9 additions and 0 deletions
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9
drivers/usb/dwc3/dwc3-msm.c
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@ -1249,6 +1249,7 @@ static int dwc3_msm_gsi_ep_op(struct usb_ep *ep,
struct usb_gsi_request *request;
struct gsi_channel_info *ch_info;
bool block_db, f_suspend;
unsigned long flags;
switch (op) {
case GSI_EP_OP_PREPARE_TRBS:
@ -1263,11 +1264,15 @@ static int dwc3_msm_gsi_ep_op(struct usb_ep *ep,
case GSI_EP_OP_CONFIG:
request = (struct usb_gsi_request *)op_data;
dev_dbg(mdwc->dev, "EP_OP_CONFIG for %s\n", ep->name);
spin_lock_irqsave(&dwc->lock, flags);
gsi_configure_ep(ep, request);
spin_unlock_irqrestore(&dwc->lock, flags);
break;
case GSI_EP_OP_STARTXFER:
dev_dbg(mdwc->dev, "EP_OP_STARTXFER for %s\n", ep->name);
spin_lock_irqsave(&dwc->lock, flags);
ret = gsi_startxfer_for_ep(ep);
spin_unlock_irqrestore(&dwc->lock, flags);
break;
case GSI_EP_OP_GET_XFER_IDX:
dev_dbg(mdwc->dev, "EP_OP_GET_XFER_IDX for %s\n", ep->name);
@ -1293,12 +1298,16 @@ static int dwc3_msm_gsi_ep_op(struct usb_ep *ep,
case GSI_EP_OP_UPDATEXFER:
request = (struct usb_gsi_request *)op_data;
dev_dbg(mdwc->dev, "EP_OP_UPDATEXFER\n");
spin_lock_irqsave(&dwc->lock, flags);
ret = gsi_updatexfer_for_ep(ep, request);
spin_unlock_irqrestore(&dwc->lock, flags);
break;
case GSI_EP_OP_ENDXFER:
request = (struct usb_gsi_request *)op_data;
dev_dbg(mdwc->dev, "EP_OP_ENDXFER for %s\n", ep->name);
spin_lock_irqsave(&dwc->lock, flags);
gsi_endxfer_for_ep(ep);
spin_unlock_irqrestore(&dwc->lock, flags);
break;
case GSI_EP_OP_SET_CLR_BLOCK_DBL:
block_db = *((bool *)op_data);