commit 5999914f227b20addf01297b3df24be6b4161f69 upstream.
The cmd argument we pass to
dwc3_send_gadget_ep_cmd() could contain extra
arguments embedded. When checking for StartTransfer
command, we need to make sure to match only lower 4
bits which contain the actual command and ignore the
rest.
Cc: <stable@xxxxxxxxxxxxxxx> # v4.9
Reported-by: Janusz Dziedzic <januszx.dziedzic@xxxxxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
---
drivers/usb/dwc3/core.h | 2 ++
drivers/usb/dwc3/gadget.c | 2 +-
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 6b60e42626a2..99fa8b8b06fe 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -450,6 +450,8 @@
#define DWC3_DEPCMD_SETTRANSFRESOURCE (0x02 << 0)
#define DWC3_DEPCMD_SETEPCONFIG (0x01 << 0)
+#define DWC3_DEPCMD_CMD(x) ((x) & 0xf)
+
/* The EP number goes 0..31 so ep0 is always out and ep1 is always in */
#define DWC3_DALEPENA_EP(n) (1 << n)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 1dfa56a5f1c5..178aece29b26 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -258,7 +258,7 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd,
}
}
- if (cmd == DWC3_DEPCMD_STARTTRANSFER) {
+ if (DWC3_DEPCMD_CMD(cmd) == DWC3_DEPCMD_STARTTRANSFER) {
int needs_wakeup;
needs_wakeup = (dwc->link_state == DWC3_LINK_STATE_U1 ||
--
2.11.0
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