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usb: musb: gadget: restart request on clearing endpoint halt 

Commit 46034dca51 (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>
Cc: stable@kernel.org
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sergei Shtylyov 2010-09-11 13:23:12 -05:00 committed by Greg Kroah-Hartman
parent 4c64733826
commit a666e3e609
3 changed files with 12 additions and 1 deletions
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2
drivers/usb/musb/musb_gadget.c
View File

@ -1084,7 +1084,7 @@ struct free_record {
/* /*
* Context: controller locked, IRQs blocked. * 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", DBG(3, "<== %s request %p len %u on hw_ep%d\n",
req->tx ? "TX/IN" : "RX/OUT", req->tx ? "TX/IN" : "RX/OUT",

2
drivers/usb/musb/musb_gadget.h
View File

@ -105,4 +105,6 @@ extern void musb_gadget_cleanup(struct musb *);
extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int); extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int);
extern void musb_ep_restart(struct musb *, struct musb_request *);
#endif /* __MUSB_GADGET_H */ #endif /* __MUSB_GADGET_H */

9
drivers/usb/musb/musb_gadget_ep0.c
View File

@ -261,6 +261,7 @@ __acquires(musb->lock)
ctrlrequest->wIndex & 0x0f; ctrlrequest->wIndex & 0x0f;
struct musb_ep *musb_ep; struct musb_ep *musb_ep;
struct musb_hw_ep *ep; struct musb_hw_ep *ep;
struct musb_request *request;
void __iomem *regs; void __iomem *regs;
int is_in; int is_in;
u16 csr; u16 csr;
@ -302,6 +303,14 @@ __acquires(musb->lock)
musb_writew(regs, MUSB_RXCSR, csr); musb_writew(regs, MUSB_RXCSR, 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 */ /* select ep0 again */
musb_ep_select(mbase, 0); musb_ep_select(mbase, 0);
} break; } break;