[ Upstream commit fbc318afadd6e7ae2252d6158cf7d0c5a2132f7d ]
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.
Also remove the unnecessary cast.
Acked-by: Sylvain Lemieux slemieux.tyco@gmail.com Tested-by: James Grant jamesg@zaltys.org Signed-off-by: Alexandre Belloni alexandre.belloni@bootlin.com Signed-off-by: Felipe Balbi felipe.balbi@linux.intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/gadget/udc/lpc32xx_udc.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c index b0781771704e..eafc2a00c96a 100644 --- a/drivers/usb/gadget/udc/lpc32xx_udc.c +++ b/drivers/usb/gadget/udc/lpc32xx_udc.c @@ -922,8 +922,7 @@ static struct lpc32xx_usbd_dd_gad *udc_dd_alloc(struct lpc32xx_udc *udc) dma_addr_t dma; struct lpc32xx_usbd_dd_gad *dd;
- dd = (struct lpc32xx_usbd_dd_gad *) dma_pool_alloc( - udc->dd_cache, (GFP_KERNEL | GFP_DMA), &dma); + dd = dma_pool_alloc(udc->dd_cache, GFP_ATOMIC | GFP_DMA, &dma); if (dd) dd->this_dma = dma;