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| Started by | Baolin Wang <baolin.wang@linaro.org> |
|---|---|
| First post | 2016-09-19 14:00 +0200 |
| Last post | 2016-09-19 14:00 +0200 |
| Articles | 1 — 1 participant |
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[PATCH v3 1/2] usb: dwc3: gadget: Add disconnect checking when changing function dynamically Baolin Wang <baolin.wang@linaro.org> - 2016-09-19 14:00 +0200
| From | Baolin Wang <baolin.wang@linaro.org> |
|---|---|
| Date | 2016-09-19 14:00 +0200 |
| Subject | [PATCH v3 1/2] usb: dwc3: gadget: Add disconnect checking when changing function dynamically |
| Message-ID | <sj5oR-4Xz-3@gated-at.bofh.it> |
When system has stpped the gadget, we should avoid queuing any requests which will cause tranfer failed. Thus adding some disconnect checking to avoid this situation. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> --- Changes since v2: - Move disconnect checking into dwc3_send_gadget_ep_cmd(). - Rename completion name and issue complete() at one place. - Move completion initialization into dwc3_gadget_init(). Changes since v1: - Split into 2 separate ptaches. - Choose complete mechanism instead of polling. --- drivers/usb/dwc3/gadget.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 1783406..ca2ae5b 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -241,6 +241,9 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd, int susphy = false; int ret = -EINVAL; + if (!dwc->pullups_connected) + return -ESHUTDOWN; + /* * Synopsys Databook 2.60a states, on section 6.3.2.5.[1-8], that if * we're issuing an endpoint command, we must check if -- 1.7.9.5
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