From: Dave Jiang <dave.jiang@intel.com>
Date: Tue, 22 Aug 2023 16:05:02 +0000 (-0700)
Subject: ntb: Check tx descriptors outstanding instead of head/tail for tx queue
X-Git-Tag: v6.6.17~3951^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=643982232860887fed493144957ea5794b6557d1;p=platform%2Fkernel%2Flinux-rpi.git

ntb: Check tx descriptors outstanding instead of head/tail for tx queue

Use existing function ntb_transport_tx_free_entry() instead of open coding
the check to see if there are outstanding tx descriptors.

Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
---

diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 9532108..f9e7847 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -1901,7 +1901,7 @@ err:
 static int ntb_process_tx(struct ntb_transport_qp *qp,
 			  struct ntb_queue_entry *entry)
 {
-	if (qp->tx_index == qp->remote_rx_info->entry) {
+	if (!ntb_transport_tx_free_entry(qp)) {
 		qp->tx_ring_full++;
 		return -EAGAIN;
 	}