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usb: musb: Call pm_runtime from musb_gadget_queue 

If we're booting pandaboard using NFSroot over built-in g_ether, we
can get the following after booting once and doing a warm reset:

g_ether gadget: ecm_open
g_ether gadget: notify connect true
...
WARNING: CPU: 0 PID: 1 at drivers/bus/omap_l3_noc.c:147
l3_interrupt_handler+0x220/0x34c
44000000.ocp:L3 Custom Error: MASTER MPU TARGET L4CFG (Read):
Data Access in User mode du ring Functional access
...

Fix the issue by calling pm_runtime functions from
musb_gadget_queue.

Note that in the long run we should be able to queue the pending
transfers if pm_runtime is not active, and flush the queue from
pm_runtime_resume.

Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tony Lindgren 2016-10-19 12:03:40 -05:00 committed by Greg Kroah-Hartman
parent d8e5f0eca1
commit cacaaf80c3
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/musb/musb_gadget.c
View File

@ -1255,6 +1255,7 @@ static int musb_gadget_queue(struct usb_ep *ep, struct usb_request *req,
map_dma_buffer(request, musb, musb_ep);
pm_runtime_get_sync(musb->controller);
spin_lock_irqsave(&musb->lock, lockflags);
/* don't queue if the ep is down */
@ -1275,6 +1276,9 @@ static int musb_gadget_queue(struct usb_ep *ep, struct usb_request *req,
unlock:
spin_unlock_irqrestore(&musb->lock, lockflags);
pm_runtime_mark_last_busy(musb->controller);
pm_runtime_put_autosuspend(musb->controller);
return status;
}