4.19-stable review patch. If anyone has any objections, please let me know.
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From: Dave Jiang dave.jiang@intel.com
commit f195a1a6fe416882984f8bd6c61afc1383171860 upstream.
Currently when the transport receive packets after netdev has closed the transport returns error and triggers tx errors to be incremented and carrier to be stopped. There is no reason to return error if the device is already closed. Drop the packet and return 0.
Fixes: e26a5843f7f5 ("NTB: Split ntb_hw_intel and ntb_transport drivers") Reported-by: Yuan Y Lu yuan.y.lu@intel.com Tested-by: Yuan Y Lu yuan.y.lu@intel.com Reviewed-by: Logan Gunthorpe logang@deltatee.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 --- drivers/ntb/ntb_transport.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/ntb/ntb_transport.c +++ b/drivers/ntb/ntb_transport.c @@ -2046,9 +2046,13 @@ int ntb_transport_tx_enqueue(struct ntb_ struct ntb_queue_entry *entry; int rc;
- if (!qp || !qp->link_is_up || !len) + if (!qp || !len) return -EINVAL;
+ /* If the qp link is down already, just ignore. */ + if (!qp->link_is_up) + return 0; + entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q); if (!entry) { qp->tx_err_no_buf++;