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usb: dwc2: host: allocate qtd before atomic enqueue 

To avoid sleep while atomic bugs, allocate qtd before calling
dwc2_hcd_urb_enqueue. No need to pass mem_flags to
dwc2_hcd_urb_enqueue any more as no memory allocations are done in it.

Acked-by: John Youn <johnyoun@synopsys.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Mian Yousaf Kaukab 2015-06-29 11:05:29 +02:00 committed by Felipe Balbi
parent b58e6ceef9
commit b5a468a6aa
1 changed files with 17 additions and 11 deletions
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28
drivers/usb/dwc2/hcd.c
View File

@ -360,9 +360,8 @@ void dwc2_hcd_stop(struct dwc2_hsotg *hsotg)
/* Caller must hold driver lock */
static int dwc2_hcd_urb_enqueue(struct dwc2_hsotg *hsotg,
struct dwc2_hcd_urb *urb, struct dwc2_qh *qh,
gfp_t mem_flags)
struct dwc2_qtd *qtd)
{
struct dwc2_qtd *qtd;
u32 intr_mask;
int retval;
int dev_speed;
@ -386,9 +385,8 @@ static int dwc2_hcd_urb_enqueue(struct dwc2_hsotg *hsotg,
return -ENODEV;
}
qtd = kzalloc(sizeof(*qtd), mem_flags);
if (!qtd)
return -ENOMEM;
return -EINVAL;
dwc2_hcd_qtd_init(qtd, urb);
retval = dwc2_hcd_qtd_add(hsotg, qtd, qh);
@ -396,7 +394,6 @@ static int dwc2_hcd_urb_enqueue(struct dwc2_hsotg *hsotg,
dev_err(hsotg->dev,
"DWC OTG HCD URB Enqueue failed adding QTD. Error status %d\n",
retval);
kfree(qtd);
return retval;
}
@ -2446,6 +2443,7 @@ static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
unsigned long flags;
struct dwc2_qh *qh;
bool qh_allocated = false;
struct dwc2_qtd *qtd;
if (dbg_urb(urb)) {
dev_vdbg(hsotg->dev, "DWC OTG HCD URB Enqueue\n");
@ -2536,15 +2534,21 @@ static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
qh_allocated = true;
}
qtd = kzalloc(sizeof(*qtd), mem_flags);
if (!qtd) {
retval = -ENOMEM;
goto fail1;
}
spin_lock_irqsave(&hsotg->lock, flags);
retval = usb_hcd_link_urb_to_ep(hcd, urb);
if (retval)
goto fail1;
retval = dwc2_hcd_urb_enqueue(hsotg, dwc2_urb, qh, mem_flags);
if (retval)
goto fail2;
retval = dwc2_hcd_urb_enqueue(hsotg, dwc2_urb, qh, qtd);
if (retval)
goto fail3;
if (alloc_bandwidth) {
dwc2_allocate_bus_bandwidth(hcd,
dwc2_hcd_get_ep_bandwidth(hsotg, ep),
@ -2555,12 +2559,14 @@ static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
return 0;
fail2:
fail3:
dwc2_urb->priv = NULL;
usb_hcd_unlink_urb_from_ep(hcd, urb);
fail1:
fail2:
spin_unlock_irqrestore(&hsotg->lock, flags);
urb->hcpriv = NULL;
kfree(qtd);
fail1:
if (qh_allocated) {
struct dwc2_qtd *qtd2, *qtd2_tmp;