staging: emxx_udc: Replace GFP_KERNEL with GFP_ATOMIC

To avoid deadlock, do not call blocking functions with spinlocks held.

Replace GFP_KERNEL with GFP_ATOMIC, as the latter will fail if the pile
doesn't have enough free pages but will not sleep and hence deadlock can
be avoided.

Found by Coccinelle.

Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/emxx_udc/emxx_udc.c b/drivers/staging/emxx_udc/emxx_udc.c
index 4be646c..6c1de27 100644 (file)
--- a/drivers/staging/emxx_udc/emxx_udc.c
+++ b/drivers/staging/emxx_udc/emxx_udc.c
@@ -2794,7 +2794,7 @@ static int nbu2ss_ep_queue(
                if (ep->virt_buf == NULL)
                        ep->virt_buf = (u8 *)dma_alloc_coherent(
                                NULL, PAGE_SIZE,
-                               &ep->phys_buf, GFP_KERNEL | GFP_DMA);
+                               &ep->phys_buf, GFP_ATOMIC | GFP_DMA);
                if (ep->epnum > 0)  {
                        if (ep->direct == USB_DIR_IN)
                                memcpy(ep->virt_buf, req->req.buf,