tree 5abfef9f2fa9c6e1c2b82eb1848f76120b39f8a7
parent 454d5d882c7e412b840e3c99010fe81a9862f6fb
author David Vrabel <david.vrabel@citrix.com> 1446218161 +0000
committer Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 1450450823 -0500

xen-netback: don't use last request to determine minimum Tx credit

The last from guest transmitted request gives no indication about the
minimum amount of credit that the guest might need to send a packet
since the last packet might have been a small one.

Instead allow for the worst case 128 KiB packet.

This is part of XSA155.

CC: stable@vger.kernel.org
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>