git: 2f17afd19a35 - main - ena: Clear NS_MOREFRAG flag for last netmap slot

The branch main has been updated by osamaabb:

URL: https://cgit.FreeBSD.org/src/commit/?id=2f17afd19a3534dc1755c52edb0c2f70ea0eb1e4

commit 2f17afd19a3534dc1755c52edb0c2f70ea0eb1e4
Author:     Osama Abboud <osamaabb@amazon.com>
AuthorDate: 2024-08-07 06:24:21 +0000
Commit:     Osama Abboud <osamaabb@FreeBSD.org>
CommitDate: 2024-10-15 17:38:32 +0000

    ena: Clear NS_MOREFRAG flag for last netmap slot
    
    When processing packets within the rx-flow
    ena_netmap_rx_load_desc doesn't know the number of descriptors, so it
    sets NS_MOREFRAG to all the slots to indicate that there are more
    fragments for this packet.
    The code calls ena_netmap_rx_load_desc() for every descriptor in
    this packet to map the relevant buffer into the netmap shared memory.
    After ena_netmap_rx_load_desc() calls, we need to unset the NS_MOREFRAG
    for the last fragment to indicate that this is the last fragment,
    so we explicitly turn off NS_MOREFRAG flag.
    Current code overrides all other flags and sets NS_BUF_CHANGED.
    This patch unsets the relevant flag only.
    
    Approved by: cperciva (mentor)
    MFC after: 2 weeks
    Sponsored by: Amazon, Inc.
---
 sys/dev/ena/ena_netmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/dev/ena/ena_netmap.c b/sys/dev/ena/ena_netmap.c
index eef8021b8569..8a220373ec3f 100644
--- a/sys/dev/ena/ena_netmap.c
+++ b/sys/dev/ena/ena_netmap.c
@@ -964,7 +964,7 @@ ena_netmap_rx_frame(struct ena_netmap_ctx *ctx)
 	 * It just set flag NS_MOREFRAG to all slots, then here flag of
 	 * last slot is cleared.
 	 */
-	ctx->slots[nm_prev(ctx->nm_i, ctx->lim)].flags = NS_BUF_CHANGED;
+	ctx->slots[nm_prev(ctx->nm_i, ctx->lim)].flags &= ~NS_MOREFRAG;
 
 	if (rc != 0) {
 		goto rx_clear_desc;