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ice: Use the software based tail when checking for hung Tx ring

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Currently in ice_get_tx_pending we try to read a Tx ring's tail. This is
then compared with the software based head (next_to_clean) to determine
if we have pending work. This will never work because reading of the Tx
ring's tail is no longer supported. Fix this by using the software based
tail (next_to_use) to determine if there is pending work.

Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Brett Creeley
2019-07-25 01:55:28 -07:00
committed by Jeff Kirsher
parent 932630fa90
commit c1ddf1f5c4
1 changed files with 3 additions and 3 deletions
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drivers/net/ethernet/intel/ice/ice_main.c
+3 -3
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@@ -41,12 +41,12 @@ static void ice_update_pf_stats(struct ice_pf *pf);
* ice_get_tx_pending - returns number of Tx descriptors not processed
* @ring: the ring of descriptors
*/
static u32 ice_get_tx_pending(struct ice_ring *ring)
static u16 ice_get_tx_pending(struct ice_ring *ring)
{
u32 head, tail;
u16 head, tail;
head = ring->next_to_clean;
tail = readl(ring->tail);
tail = ring->next_to_use;
if (head != tail)
return (head < tail) ?