Gadget drivers may queue request in interrupt context. This would lead to a descriptor allocation in that context. In that case we would hit BUG_ON(in_interrupt()) in __get_vm_area_node. Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> --- drivers/usb/gadget/udc/lpc32xx_udc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c index d8f1c60793ed..b706d9c85a35 100644 --- a/drivers/usb/gadget/udc/lpc32xx_udc.c +++ b/drivers/usb/gadget/udc/lpc32xx_udc.c @@ -938,7 +938,7 @@ static struct lpc32xx_usbd_dd_gad *udc_dd_alloc(struct lpc32xx_udc *udc) struct lpc32xx_usbd_dd_gad *dd; dd = (struct lpc32xx_usbd_dd_gad *) dma_pool_alloc( - udc->dd_cache, (GFP_KERNEL | GFP_DMA), &dma); + udc->dd_cache, (GFP_ATOMIC | GFP_DMA), &dma); if (dd) dd->this_dma = dma; -- 2.21.0
