[SRU][Xenial][Yakkety][PATCH 0/1] drivers: net: xgene: Fix redundant prefetch buffer cleanup

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[SRU][Xenial][Yakkety][PATCH 0/1] drivers: net: xgene: Fix redundant prefetch buffer cleanup

Joseph Salisbury-3
BugLink: http://bugs.launchpad.net/bugs/1693673

== SRU Justification ==
When rebooting the Mustang board (ARM64 based) running Tianocore 3.06.25 or 3.07.09,
an IOB Error is reported.  This bug is resolved by mainline commit 8aba8474181070a30f56ffd19359f5d80665175e.

Commit 8aba84741810 is in mainline, but not tagged for a specific release as of yet.

Zesty and Artful also need this fix.  However, Z and A are clean picks,
so that SRU request will be sent separatly.  Xenial and Yakkety needed a minor back port.

== Fix ==
commit 8aba8474181070a30f56ffd19359f5d80665175e
Author: Iyappan Subramanian <[hidden email]>
Date:   Wed May 10 13:45:10 2017 -0700

    drivers: net: xgene: Fix redundant prefetch buffer cleanup

== Regression Potential ==
Low since changes are specific to xgene.

== Test Case ==
A test kernel was built with this patch and tested by the original bug
reporter.  The bug reporter states the test kernel resolved the bug.

Iyappan Subramanian (1):
  drivers: net: xgene: Fix redundant prefetch buffer cleanup

 drivers/net/ethernet/apm/xgene/xgene_enet_hw.c    | 21 ---------------------
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c  |  2 +-
 drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c | 21 ---------------------
 drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c | 21 ---------------------
 4 files changed, 1 insertion(+), 64 deletions(-)

--
2.7.4


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[SRU][Xenial][Yakkety][PATCH 1/1] drivers: net: xgene: Fix redundant prefetch buffer cleanup

Joseph Salisbury-3
From: Iyappan Subramanian <[hidden email]>

BugLink: http://bugs.launchpad.net/bugs/1693673

Prefetch buffer cleanup code was called twice, causing EDAC to
report errors during reboot.

[ 1130.972475] xgene-edac 78800000.edac: IOB bridge agent (BA) transaction
error
[ 1130.979584] xgene-edac 78800000.edac: IOB BA write response error
[ 1130.985648] xgene-edac 78800000.edac: IOB BA write access at 0x00.00000000
()
[ 1130.993612] xgene-edac 78800000.edac: IOB BA requestor ID 0x00002400
[ 1131.000242] xgene-edac 78800000.edac: IOB bridge agent (BA) transaction
error
...

This patch fixes the errors by,

- removing the redundant prefetch buffer cleanup from port_ops->shutdown()
- moving port_ops->shutdown() after delete_rings()

Signed-off-by: Iyappan Subramanian <[hidden email]>
Signed-off-by: David S. Miller <[hidden email]>
(back ported from commit 8aba8474181070a30f56ffd19359f5d80665175e)
Signed-off-by: Joseph Salisbury <[hidden email]>
---
 drivers/net/ethernet/apm/xgene/xgene_enet_hw.c    | 21 ---------------------
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c  |  2 +-
 drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c | 21 ---------------------
 drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c | 21 ---------------------
 4 files changed, 1 insertion(+), 64 deletions(-)

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
index 18bb955..3ca84af 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
@@ -681,27 +681,6 @@ static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
 static void xgene_gport_shutdown(struct xgene_enet_pdata *pdata)
 {
  struct device *dev = &pdata->pdev->dev;
- struct xgene_enet_desc_ring *ring;
- u32 pb, val;
- int i;
-
- pb = 0;
- for (i = 0; i < pdata->rxq_cnt; i++) {
- ring = pdata->rx_ring[i]->buf_pool;
-
- val = xgene_enet_ring_bufnum(ring->id);
- pb |= BIT(val - 0x20);
- }
- xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPRESET_ADDR, pb);
-
- pb = 0;
- for (i = 0; i < pdata->txq_cnt; i++) {
- ring = pdata->tx_ring[i];
-
- val = xgene_enet_ring_bufnum(ring->id);
- pb |= BIT(val);
- }
- xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQRESET_ADDR, pb);
 
  if (dev->of_node) {
  if (!IS_ERR(pdata->clk))
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
index d1d6b5e..f58971f 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
@@ -1706,8 +1706,8 @@ static int xgene_enet_remove(struct platform_device *pdev)
  xgene_enet_mdio_remove(pdata);
 
  unregister_netdev(ndev);
- pdata->port_ops->shutdown(pdata);
  xgene_enet_delete_desc_rings(pdata);
+ pdata->port_ops->shutdown(pdata);
  free_netdev(ndev);
 
  return 0;
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
index d12e9cb..aa46458 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
@@ -527,27 +527,6 @@ static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
 static void xgene_enet_shutdown(struct xgene_enet_pdata *p)
 {
  struct device *dev = &p->pdev->dev;
- struct xgene_enet_desc_ring *ring;
- u32 pb, val;
- int i;
-
- pb = 0;
- for (i = 0; i < p->rxq_cnt; i++) {
- ring = p->rx_ring[i]->buf_pool;
-
- val = xgene_enet_ring_bufnum(ring->id);
- pb |= BIT(val - 0x20);
- }
- xgene_enet_wr_ring_if(p, ENET_CFGSSQMIFPRESET_ADDR, pb);
-
- pb = 0;
- for (i = 0; i < p->txq_cnt; i++) {
- ring = p->tx_ring[i];
-
- val = xgene_enet_ring_bufnum(ring->id);
- pb |= BIT(val);
- }
- xgene_enet_wr_ring_if(p, ENET_CFGSSQMIWQRESET_ADDR, pb);
 
  if (dev->of_node) {
  if (!IS_ERR(p->clk))
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
index 9c6ad0d..0f706f8 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
@@ -309,27 +309,6 @@ static void xgene_enet_xgcle_bypass(struct xgene_enet_pdata *pdata,
 static void xgene_enet_shutdown(struct xgene_enet_pdata *pdata)
 {
  struct device *dev = &pdata->pdev->dev;
- struct xgene_enet_desc_ring *ring;
- u32 pb, val;
- int i;
-
- pb = 0;
- for (i = 0; i < pdata->rxq_cnt; i++) {
- ring = pdata->rx_ring[i]->buf_pool;
-
- val = xgene_enet_ring_bufnum(ring->id);
- pb |= BIT(val - 0x20);
- }
- xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPRESET_ADDR, pb);
-
- pb = 0;
- for (i = 0; i < pdata->txq_cnt; i++) {
- ring = pdata->tx_ring[i];
-
- val = xgene_enet_ring_bufnum(ring->id);
- pb |= BIT(val);
- }
- xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQRESET_ADDR, pb);
 
  if (dev->of_node) {
  if (!IS_ERR(pdata->clk))
--
2.7.4


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ACK: [SRU][Xenial][Yakkety][PATCH 1/1] drivers: net: xgene: Fix redundant prefetch buffer cleanup

Stefan Bader-2
On 14.07.2017 22:35, Joseph Salisbury wrote:

> From: Iyappan Subramanian <[hidden email]>
>
> BugLink: http://bugs.launchpad.net/bugs/1693673
>
> Prefetch buffer cleanup code was called twice, causing EDAC to
> report errors during reboot.
>
> [ 1130.972475] xgene-edac 78800000.edac: IOB bridge agent (BA) transaction
> error
> [ 1130.979584] xgene-edac 78800000.edac: IOB BA write response error
> [ 1130.985648] xgene-edac 78800000.edac: IOB BA write access at 0x00.00000000
> ()
> [ 1130.993612] xgene-edac 78800000.edac: IOB BA requestor ID 0x00002400
> [ 1131.000242] xgene-edac 78800000.edac: IOB bridge agent (BA) transaction
> error
> ...
>
> This patch fixes the errors by,
>
> - removing the redundant prefetch buffer cleanup from port_ops->shutdown()
> - moving port_ops->shutdown() after delete_rings()
>
> Signed-off-by: Iyappan Subramanian <[hidden email]>
> Signed-off-by: David S. Miller <[hidden email]>
> (back ported from commit 8aba8474181070a30f56ffd19359f5d80665175e)
> Signed-off-by: Joseph Salisbury <[hidden email]>
Acked-by: Stefan Bader <[hidden email]>

> ---


Again like for Z/A...

>  drivers/net/ethernet/apm/xgene/xgene_enet_hw.c    | 21 ---------------------
>  drivers/net/ethernet/apm/xgene/xgene_enet_main.c  |  2 +-
>  drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c | 21 ---------------------
>  drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c | 21 ---------------------
>  4 files changed, 1 insertion(+), 64 deletions(-)
>
> diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
> index 18bb955..3ca84af 100644
> --- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
> +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
> @@ -681,27 +681,6 @@ static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
>  static void xgene_gport_shutdown(struct xgene_enet_pdata *pdata)
>  {
>   struct device *dev = &pdata->pdev->dev;
> - struct xgene_enet_desc_ring *ring;
> - u32 pb, val;
> - int i;
> -
> - pb = 0;
> - for (i = 0; i < pdata->rxq_cnt; i++) {
> - ring = pdata->rx_ring[i]->buf_pool;
> -
> - val = xgene_enet_ring_bufnum(ring->id);
> - pb |= BIT(val - 0x20);
> - }
> - xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPRESET_ADDR, pb);
> -
> - pb = 0;
> - for (i = 0; i < pdata->txq_cnt; i++) {
> - ring = pdata->tx_ring[i];
> -
> - val = xgene_enet_ring_bufnum(ring->id);
> - pb |= BIT(val);
> - }
> - xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQRESET_ADDR, pb);
>  
>   if (dev->of_node) {
>   if (!IS_ERR(pdata->clk))
> diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
> index d1d6b5e..f58971f 100644
> --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
> +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
> @@ -1706,8 +1706,8 @@ static int xgene_enet_remove(struct platform_device *pdev)
>   xgene_enet_mdio_remove(pdata);
>  
>   unregister_netdev(ndev);
> - pdata->port_ops->shutdown(pdata);
>   xgene_enet_delete_desc_rings(pdata);
> + pdata->port_ops->shutdown(pdata);
>   free_netdev(ndev);
>  
>   return 0;
> diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
> index d12e9cb..aa46458 100644
> --- a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
> +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
> @@ -527,27 +527,6 @@ static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
>  static void xgene_enet_shutdown(struct xgene_enet_pdata *p)
>  {
>   struct device *dev = &p->pdev->dev;
> - struct xgene_enet_desc_ring *ring;
> - u32 pb, val;
> - int i;
> -
> - pb = 0;
> - for (i = 0; i < p->rxq_cnt; i++) {
> - ring = p->rx_ring[i]->buf_pool;
> -
> - val = xgene_enet_ring_bufnum(ring->id);
> - pb |= BIT(val - 0x20);
> - }
> - xgene_enet_wr_ring_if(p, ENET_CFGSSQMIFPRESET_ADDR, pb);
> -
> - pb = 0;
> - for (i = 0; i < p->txq_cnt; i++) {
> - ring = p->tx_ring[i];
> -
> - val = xgene_enet_ring_bufnum(ring->id);
> - pb |= BIT(val);
> - }
> - xgene_enet_wr_ring_if(p, ENET_CFGSSQMIWQRESET_ADDR, pb);
>  
>   if (dev->of_node) {
>   if (!IS_ERR(p->clk))
> diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
> index 9c6ad0d..0f706f8 100644
> --- a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
> +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
> @@ -309,27 +309,6 @@ static void xgene_enet_xgcle_bypass(struct xgene_enet_pdata *pdata,
>  static void xgene_enet_shutdown(struct xgene_enet_pdata *pdata)
>  {
>   struct device *dev = &pdata->pdev->dev;
> - struct xgene_enet_desc_ring *ring;
> - u32 pb, val;
> - int i;
> -
> - pb = 0;
> - for (i = 0; i < pdata->rxq_cnt; i++) {
> - ring = pdata->rx_ring[i]->buf_pool;
> -
> - val = xgene_enet_ring_bufnum(ring->id);
> - pb |= BIT(val - 0x20);
> - }
> - xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPRESET_ADDR, pb);
> -
> - pb = 0;
> - for (i = 0; i < pdata->txq_cnt; i++) {
> - ring = pdata->tx_ring[i];
> -
> - val = xgene_enet_ring_bufnum(ring->id);
> - pb |= BIT(val);
> - }
> - xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQRESET_ADDR, pb);
>  
>   if (dev->of_node) {
>   if (!IS_ERR(pdata->clk))
>


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ACK: [SRU][Xenial][Yakkety][PATCH 1/1] drivers: net: xgene: Fix redundant prefetch buffer cleanup

Colin King
In reply to this post by Joseph Salisbury-3
On 14/07/17 21:35, Joseph Salisbury wrote:

> From: Iyappan Subramanian <[hidden email]>
>
> BugLink: http://bugs.launchpad.net/bugs/1693673
>
> Prefetch buffer cleanup code was called twice, causing EDAC to
> report errors during reboot.
>
> [ 1130.972475] xgene-edac 78800000.edac: IOB bridge agent (BA) transaction
> error
> [ 1130.979584] xgene-edac 78800000.edac: IOB BA write response error
> [ 1130.985648] xgene-edac 78800000.edac: IOB BA write access at 0x00.00000000
> ()
> [ 1130.993612] xgene-edac 78800000.edac: IOB BA requestor ID 0x00002400
> [ 1131.000242] xgene-edac 78800000.edac: IOB bridge agent (BA) transaction
> error
> ...
>
> This patch fixes the errors by,
>
> - removing the redundant prefetch buffer cleanup from port_ops->shutdown()
> - moving port_ops->shutdown() after delete_rings()
>
> Signed-off-by: Iyappan Subramanian <[hidden email]>
> Signed-off-by: David S. Miller <[hidden email]>
> (back ported from commit 8aba8474181070a30f56ffd19359f5d80665175e)
> Signed-off-by: Joseph Salisbury <[hidden email]>
> ---
>  drivers/net/ethernet/apm/xgene/xgene_enet_hw.c    | 21 ---------------------
>  drivers/net/ethernet/apm/xgene/xgene_enet_main.c  |  2 +-
>  drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c | 21 ---------------------
>  drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c | 21 ---------------------
>  4 files changed, 1 insertion(+), 64 deletions(-)
>
> diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
> index 18bb955..3ca84af 100644
> --- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
> +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
> @@ -681,27 +681,6 @@ static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
>  static void xgene_gport_shutdown(struct xgene_enet_pdata *pdata)
>  {
>   struct device *dev = &pdata->pdev->dev;
> - struct xgene_enet_desc_ring *ring;
> - u32 pb, val;
> - int i;
> -
> - pb = 0;
> - for (i = 0; i < pdata->rxq_cnt; i++) {
> - ring = pdata->rx_ring[i]->buf_pool;
> -
> - val = xgene_enet_ring_bufnum(ring->id);
> - pb |= BIT(val - 0x20);
> - }
> - xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPRESET_ADDR, pb);
> -
> - pb = 0;
> - for (i = 0; i < pdata->txq_cnt; i++) {
> - ring = pdata->tx_ring[i];
> -
> - val = xgene_enet_ring_bufnum(ring->id);
> - pb |= BIT(val);
> - }
> - xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQRESET_ADDR, pb);
>  
>   if (dev->of_node) {
>   if (!IS_ERR(pdata->clk))
> diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
> index d1d6b5e..f58971f 100644
> --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
> +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
> @@ -1706,8 +1706,8 @@ static int xgene_enet_remove(struct platform_device *pdev)
>   xgene_enet_mdio_remove(pdata);
>  
>   unregister_netdev(ndev);
> - pdata->port_ops->shutdown(pdata);
>   xgene_enet_delete_desc_rings(pdata);
> + pdata->port_ops->shutdown(pdata);
>   free_netdev(ndev);
>  
>   return 0;
> diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
> index d12e9cb..aa46458 100644
> --- a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
> +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
> @@ -527,27 +527,6 @@ static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
>  static void xgene_enet_shutdown(struct xgene_enet_pdata *p)
>  {
>   struct device *dev = &p->pdev->dev;
> - struct xgene_enet_desc_ring *ring;
> - u32 pb, val;
> - int i;
> -
> - pb = 0;
> - for (i = 0; i < p->rxq_cnt; i++) {
> - ring = p->rx_ring[i]->buf_pool;
> -
> - val = xgene_enet_ring_bufnum(ring->id);
> - pb |= BIT(val - 0x20);
> - }
> - xgene_enet_wr_ring_if(p, ENET_CFGSSQMIFPRESET_ADDR, pb);
> -
> - pb = 0;
> - for (i = 0; i < p->txq_cnt; i++) {
> - ring = p->tx_ring[i];
> -
> - val = xgene_enet_ring_bufnum(ring->id);
> - pb |= BIT(val);
> - }
> - xgene_enet_wr_ring_if(p, ENET_CFGSSQMIWQRESET_ADDR, pb);
>  
>   if (dev->of_node) {
>   if (!IS_ERR(p->clk))
> diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
> index 9c6ad0d..0f706f8 100644
> --- a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
> +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
> @@ -309,27 +309,6 @@ static void xgene_enet_xgcle_bypass(struct xgene_enet_pdata *pdata,
>  static void xgene_enet_shutdown(struct xgene_enet_pdata *pdata)
>  {
>   struct device *dev = &pdata->pdev->dev;
> - struct xgene_enet_desc_ring *ring;
> - u32 pb, val;
> - int i;
> -
> - pb = 0;
> - for (i = 0; i < pdata->rxq_cnt; i++) {
> - ring = pdata->rx_ring[i]->buf_pool;
> -
> - val = xgene_enet_ring_bufnum(ring->id);
> - pb |= BIT(val - 0x20);
> - }
> - xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPRESET_ADDR, pb);
> -
> - pb = 0;
> - for (i = 0; i < pdata->txq_cnt; i++) {
> - ring = pdata->tx_ring[i];
> -
> - val = xgene_enet_ring_bufnum(ring->id);
> - pb |= BIT(val);
> - }
> - xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQRESET_ADDR, pb);
>  
>   if (dev->of_node) {
>   if (!IS_ERR(pdata->clk))
>

Backport looks correct, positive test results, so..

Acked-by: Colin Ian King <[hidden email]>



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Re: [SRU][Xenial][Yakkety][PATCH 1/1] drivers: net: xgene: Fix redundant prefetch buffer cleanup

Stefan Bader-2
In reply to this post by Joseph Salisbury-3
not, or no longer, for Yakkety of course...


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APPLIED: [SRU][Xenial][Yakkety][PATCH 0/1] drivers: net: xgene: Fix redundant prefetch buffer cleanup

Thadeu Lima de Souza Cascardo-3
In reply to this post by Joseph Salisbury-3
Applied to xenial master-next branch.

Thanks.
Cascardo.

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