diff options
| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2010-09-11 13:23:12 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-28 21:43:54 -0700 |
| commit | cbf9ca5da6e5dbabba9df0ca0a8dbe1de1bfafbd (patch) | |
| tree | bfbe2931d3e7001d3a7d98b31f2e0995f8c1a57e | |
| parent | 679a100ab2728bb2fccdcfd0e18d7059de9a9067 (diff) | |
usb: musb: gadget: restart request on clearing endpoint halt
commit a666e3e6098a9f56310e4ec2705f1dad124a34b5 upstream.
Commit 46034dca515bc4ddca0399ae58106d1f5f0d809f (USB: musb_gadget_ep0: stop
abusing musb_gadget_set_halt()) forgot to restart a queued request after
clearing the endpoint halt feature. This results in a couple of USB resets
while enumerating the file-backed storage gadget due to CSW packet not being
sent for the MODE SENSE(10) command.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/musb/musb_gadget.c | 2 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_gadget.h | 2 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_gadget_ep0.c | 9 |
3 files changed, 12 insertions, 1 deletions
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index fa3983148b1..c6f5ee4575c 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1088,7 +1088,7 @@ struct free_record { /* * Context: controller locked, IRQs blocked. */ -static void musb_ep_restart(struct musb *musb, struct musb_request *req) +void musb_ep_restart(struct musb *musb, struct musb_request *req) { DBG(3, "<== %s request %p len %u on hw_ep%d\n", req->tx ? "TX/IN" : "RX/OUT", diff --git a/drivers/usb/musb/musb_gadget.h b/drivers/usb/musb/musb_gadget.h index 59502da9f73..76711f2a451 100644 --- a/drivers/usb/musb/musb_gadget.h +++ b/drivers/usb/musb/musb_gadget.h @@ -105,4 +105,6 @@ extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int); extern int musb_gadget_set_halt(struct usb_ep *ep, int value); +extern void musb_ep_restart(struct musb *, struct musb_request *); + #endif /* __MUSB_GADGET_H */ diff --git a/drivers/usb/musb/musb_gadget_ep0.c b/drivers/usb/musb/musb_gadget_ep0.c index 067e5a95b14..53c04448a8b 100644 --- a/drivers/usb/musb/musb_gadget_ep0.c +++ b/drivers/usb/musb/musb_gadget_ep0.c @@ -369,6 +369,7 @@ stall: ctrlrequest->wIndex & 0x0f; struct musb_ep *musb_ep; struct musb_hw_ep *ep; + struct musb_request *request; void __iomem *regs; int is_in; u16 csr; @@ -411,6 +412,14 @@ stall: csr); } + /* Maybe start the first request in the queue */ + request = to_musb_request( + next_request(musb_ep)); + if (!musb_ep->busy && request) { + DBG(3, "restarting the request\n"); + musb_ep_restart(musb, request); + } + /* select ep0 again */ musb_ep_select(mbase, 0); handled = 1; |