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Add a test to ti_encap() to try and prevent the transmit producer index

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from ever catching up to the transmit consumer index. We can't let this
happen because ti_txeof() depends on the assumption that producer == consumer
means the ring is empty, and producer != consumer means the ring has some
number of active descriptors in it.
This commit is contained in:
Bill Paul 1999-04-29 16:27:51 +00:00
parent f677e15fe8
commit 737267b891
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=46177
2 changed files with 10 additions and 4 deletions
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7
sys/dev/ti/if_ti.c
View file

@ -29,7 +29,7 @@
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: if_ti.c,v 1.2 1999/04/06 22:56:21 wpaul Exp $
* $Id: if_ti.c,v 1.109 1999/04/29 16:22:07 wpaul Exp $
*/
/*
@ -128,7 +128,7 @@
#if !defined(lint)
static const char rcsid[] =
"$Id: if_ti.c,v 1.2 1999/04/06 22:56:21 wpaul Exp $";
"$Id: if_ti.c,v 1.109 1999/04/29 16:22:07 wpaul Exp $";
#endif
/*
@ -2053,6 +2053,9 @@ static int ti_encap(sc, m_head, txidx)
if (m != NULL)
return(ENOBUFS);
if (frag == sc->ti_tx_saved_considx)
return(ENOBUFS);
if (sc->ti_hwrev == TI_HWREV_TIGON)
sc->ti_rdata->ti_tx_ring_nic[cur % 128].ti_flags |=
TI_BDFLAG_END;

7
sys/pci/if_ti.c
View file

@ -29,7 +29,7 @@
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: if_ti.c,v 1.2 1999/04/06 22:56:21 wpaul Exp $
* $Id: if_ti.c,v 1.109 1999/04/29 16:22:07 wpaul Exp $
*/
/*
@ -128,7 +128,7 @@
#if !defined(lint)
static const char rcsid[] =
"$Id: if_ti.c,v 1.2 1999/04/06 22:56:21 wpaul Exp $";
"$Id: if_ti.c,v 1.109 1999/04/29 16:22:07 wpaul Exp $";
#endif
/*
@ -2053,6 +2053,9 @@ static int ti_encap(sc, m_head, txidx)
if (m != NULL)
return(ENOBUFS);
if (frag == sc->ti_tx_saved_considx)
return(ENOBUFS);
if (sc->ti_hwrev == TI_HWREV_TIGON)
sc->ti_rdata->ti_tx_ring_nic[cur % 128].ti_flags |=
TI_BDFLAG_END;