diff options
| author | Mayank Rana <mrana@codeaurora.org> | 2016-09-30 18:41:17 -0700 |
|---|---|---|
| committer | Hemant Kumar <hemantk@codeaurora.org> | 2016-10-05 13:49:13 -0700 |
| commit | 79bed203c169c8670a404d8d7d5a714486d41f1c (patch) | |
| tree | 8ce6e6f90e4596c817c32bb81afa93528ff7e5f7 /drivers/usb/dwc3/dwc3-msm.c | |
| parent | 0b3886773c113fe0ad5748d8f5a9d1648fafdee2 (diff) | |
dwc3-msm: Acquire lock for USB GSI endpoint related operations
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>
Diffstat (limited to 'drivers/usb/dwc3/dwc3-msm.c')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-msm.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/dwc3-msm.c b/drivers/usb/dwc3/dwc3-msm.c index 4a4f1083198c..08006d84fb38 100644 --- a/drivers/usb/dwc3/dwc3-msm.c +++ b/drivers/usb/dwc3/dwc3-msm.c @@ -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); |