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Subject[PATCH v1 06/19] usb/hcd: Fix dma_map_sg error check
Date
dma_map_sg return 0 on error.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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: Jack Wang <jinpu.wang@ionos.com>
---
drivers/usb/core/hcd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 94b305bbd621..90dd32a24e5b 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -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;
--
2.34.1
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