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 <johny...@synopsys.com> Tested-by: Heiko Stuebner <he...@sntech.de> Signed-off-by: Mian Yousaf Kaukab <yousaf.kau...@intel.com> --- drivers/usb/dwc2/hcd.c | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-) diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 80bce71..f845c41 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -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"); @@ -2536,14 +2534,20 @@ 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; + goto fail2; - retval = dwc2_hcd_urb_enqueue(hsotg, dwc2_urb, qh, mem_flags); + retval = dwc2_hcd_urb_enqueue(hsotg, dwc2_urb, qh, qtd); if (retval) - goto fail2; + goto fail3; if (alloc_bandwidth) { dwc2_allocate_bus_bandwidth(hcd, @@ -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; -- 2.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html