ntb: Fix calculation ntb_transport_tx_free_entry()
commit 5a7693e6 upstream. ntb_transport_tx_free_entry() never returns 0 with the current calculation. If head == tail, then it would return qp->tx_max_entry. Change compare to tail >= head and when they are equal, a 0 would be returned. Fixes: e74bfeed ("NTB: Add flow control to the ntb_netdev") Reviewed-by:Logan Gunthorpe <logang@deltatee.com> Signed-off-by:
renlonglong <ren.longlong@h3c.com> Signed-off-by:
Dave Jiang <dave.jiang@intel.com> Signed-off-by:
Jon Mason <jdmason@kudzu.us> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
b2a6a169
Please register or sign in to comment