From: Suwan Kim Date: Fri, 13 Dec 2019 02:30:54 +0000 (+0900) Subject: usbip: Fix receive error in vhci-hcd when using scatter-gather X-Git-Tag: v5.10.7~3609^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d986294ee55d719562b20aabe15a39bf8f863415;p=platform%2Fkernel%2Flinux-rpi.git usbip: Fix receive error in vhci-hcd when using scatter-gather When vhci uses SG and receives data whose size is smaller than SG buffer size, it tries to receive more data even if it acutally receives all the data from the server. If then, it erroneously adds error event and triggers connection shutdown. vhci-hcd should check if it received all the data even if there are more SG entries left. So, check if it receivces all the data from the server in for_each_sg() loop. Fixes: ea44d190764b ("usbip: Implement SG support to vhci-hcd and stub driver") Reported-by: Marek Marczykowski-Górecki Tested-by: Marek Marczykowski-Górecki Signed-off-by: Suwan Kim Acked-by: Shuah Khan Cc: stable Link: https://lore.kernel.org/r/20191213023055.19933-2-suwan.kim027@gmail.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/usbip/usbip_common.c b/drivers/usb/usbip/usbip_common.c index 6532d68..e4b9667 100644 --- a/drivers/usb/usbip/usbip_common.c +++ b/drivers/usb/usbip/usbip_common.c @@ -727,6 +727,9 @@ int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb) copy -= recv; ret += recv; + + if (!copy) + break; } if (ret != size)