git: 64610df59348 - stable/14 - mana: remove redundant doorbell in mana_poll_rx_cq()

The branch stable/14 has been updated by whu:

URL: https://cgit.FreeBSD.org/src/commit/?id=64610df59348c5f72fcca56b46a4a2909b41c471

commit 64610df59348c5f72fcca56b46a4a2909b41c471
Author:     Wei Hu <whu@FreeBSD.org>
AuthorDate: 2025-03-14 05:26:45 +0000
Commit:     Wei Hu <whu@FreeBSD.org>
CommitDate: 2025-03-18 04:53:56 +0000

    mana: remove redundant doorbell in mana_poll_rx_cq()
    
    With the last commit to refill the rx mbuf in batch, the doorbell
    in mana_poll_rx_cq() becomes redundant. Remove it to save a few
    microseconds spent in mmio call.
    
    Reported by:    NetApp
    Reviewed by:    Tallamraju, Sai
    Tested by:      whu
    Fixes:          9b8701b8 ("mana: refill the rx mbuf in batch")
    MFC after:      3 days
    Sponsored by:   Microsoft
    
    (cherry picked from commit 47f4137e44b8079c7784604d220a298db07a19a1)
---
 sys/dev/mana/mana_en.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/sys/dev/mana/mana_en.c b/sys/dev/mana/mana_en.c
index 1df5419e6c64..9eeaec11d1b2 100644
--- a/sys/dev/mana/mana_en.c
+++ b/sys/dev/mana/mana_en.c
@@ -1890,13 +1890,6 @@ mana_poll_rx_cq(struct mana_cq *cq)
 		mana_process_rx_cqe(cq->rxq, cq, &comp[i]);
 	}
 
-	if (comp_read > 0) {
-		struct gdma_context *gc =
-		    cq->rxq->gdma_rq->gdma_dev->gdma_context;
-
-		mana_gd_wq_ring_doorbell(gc, cq->rxq->gdma_rq);
-	}
-
 	tcp_lro_flush_all(&cq->rxq->lro);
 }