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Thanks to the reminder from Ganbold, small fix in the RX failure

Browse source 
path for an infinite loop. Problem originally noticed in ixgbe
by Jeff Roberson and fixed there. Thanks to everyone involved.
This commit is contained in:
Jack F Vogel 2008-11-27 02:18:43 +00:00
parent 7137cea0c7
commit f0b1d25ff6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=185355
1 changed files with 11 additions and 13 deletions
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24
sys/dev/e1000/if_igb.c
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@ -3490,12 +3490,11 @@ igb_setup_receive_ring(struct rx_ring *rxr)
return (0);
fail:
/*
* We need to clean up any buffers allocated so far
* 'j' is the failing index, decrement it to get the
* last success.
* We need to clean up any buffers allocated
* so far, 'j' is the failing index.
*/
for (--j; j < 0; j--) {
rxbuf = &rxr->rx_buffers[j];
for (int i = 0; i < j; i++) {
rxbuf = &rxr->rx_buffers[i];
if (rxbuf->m_head != NULL) {
bus_dmamap_sync(rxr->rxtag, rxbuf->map,
BUS_DMASYNC_POSTREAD);
@ -3516,9 +3515,9 @@ static int
igb_setup_receive_structures(struct adapter *adapter)
{
struct rx_ring *rxr = adapter->rx_rings;
int i, j;
int j;
for (i = 0; i < adapter->num_rx_queues; i++, rxr++)
for (j = 0; j < adapter->num_rx_queues; j++, rxr++)
if (igb_setup_receive_ring(rxr))
goto fail;
@ -3527,14 +3526,13 @@ igb_setup_receive_structures(struct adapter *adapter)
/*
* Free RX buffers allocated so far, we will only handle
* the rings that completed, the failing case will have
* cleaned up for itself. The value of 'i' will be the
* failed ring so we must pre-decrement it.
* cleaned up for itself. Clean up til 'j', the failure.
*/
rxr = adapter->rx_rings;
for (--i; i > 0; i--, rxr++) {
for (j = 0; j < adapter->num_rx_desc; j++) {
for (int i = 0; i < j; i++) {
rxr = &adapter->rx_rings[i];
for (int n = 0; n < adapter->num_rx_desc; n++) {
struct igb_buffer *rxbuf;
rxbuf = &rxr->rx_buffers[j];
rxbuf = &rxr->rx_buffers[n];
if (rxbuf->m_head != NULL) {
bus_dmamap_sync(rxr->rxtag, rxbuf->map,
BUS_DMASYNC_POSTREAD);