git: 1a57779234d4 - stable/13 - netmap: Fix a queue length check in the generic port rx path

The branch stable/13 has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=1a57779234d4590fc16cba26305105f5c6fdd42b

commit 1a57779234d4590fc16cba26305105f5c6fdd42b
Author:     Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2023-01-23 19:41:55 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2023-02-01 17:22:31 +0000

    netmap: Fix a queue length check in the generic port rx path
    
    The check is ok by default, since the default value of
    netmap_generic_ringsize is 1024.  But we should check against the
    configured "ring" size.
    
    Reviewed by:    vmaffione
    MFC after:      1 week
    Sponsored by:   Zenarmor
    Sponsored by:   OPNsense
    Sponsored by:   Klara, Inc.
    Differential Revision:  https://reviews.freebsd.org/D38062
    
    (cherry picked from commit 539437c8281d24450bacded3734276acd9983e90)
---
 sys/dev/netmap/netmap_generic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/dev/netmap/netmap_generic.c b/sys/dev/netmap/netmap_generic.c
index f3125860b869..f726cf471177 100644
--- a/sys/dev/netmap/netmap_generic.c
+++ b/sys/dev/netmap/netmap_generic.c
@@ -838,7 +838,7 @@ generic_rx_handler(struct ifnet *ifp, struct mbuf *m)
 		nm_prlim(2, "Warning: driver pushed up big packet "
 				"(size=%d)", (int)MBUF_LEN(m));
 		m_freem(m);
-	} else if (unlikely(mbq_len(&kring->rx_queue) > 1024)) {
+	} else if (unlikely(mbq_len(&kring->rx_queue) > na->num_rx_desc)) {
 		m_freem(m);
 	} else {
 		mbq_safe_enqueue(&kring->rx_queue, m);