Commit 4dce3b37 authored by Jack Wang's avatar Jack Wang Committed by Greg Kroah-Hartman
Browse files

usb/hcd: Fix dma_map_sg error check 



dma_map_sg return 0 on error.

Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Alexey Sheplyakov <asheplyakov@basealt.ru>
Cc: Stephen Boyd <swboyd@chromium.org>
Cc: Weitao Wang <WeitaoWang-oc@zhaoxin.com>
Cc: Matthias Kaehlcke <mka@chromium.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-usb@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: default avatarJack Wang <jinpu.wang@ionos.com>
Link: https://lore.kernel.org/r/20220819060801.10443-7-jinpu.wang@ionos.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a88520bf

drivers/usb/core/hcd.c

+1 −1
Original line number Diff line number Diff line
@@ -1474,7 +1474,7 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 
						urb->sg,

						urb->num_sgs,

						dir);

				if (n <= 0)

				if (!n)

					ret = -EAGAIN;

				else

					urb->transfer_flags |= URB_DMA_MAP_SG;