Commit 24f476ee authored by Auke Kok's avatar Auke Kok Committed by Auke Kok

e1000: remove risky prefetch on next_skb->data

It was brought to our attention that the prefetches break e1000 traffic
on xscale/arm architectures.  Remove them for now.  We'll let them
stay in mm for a while, or find a better solution to enable.
Signed-off-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: default avatarAuke Kok <auke-jan.h.kok@intel.com>
parent b9b6e78b
...@@ -3519,7 +3519,7 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter, ...@@ -3519,7 +3519,7 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter,
buffer_info = &rx_ring->buffer_info[i]; buffer_info = &rx_ring->buffer_info[i];
while (rx_desc->status & E1000_RXD_STAT_DD) { while (rx_desc->status & E1000_RXD_STAT_DD) {
struct sk_buff *skb, *next_skb; struct sk_buff *skb;
u8 status; u8 status;
#ifdef CONFIG_E1000_NAPI #ifdef CONFIG_E1000_NAPI
if (*work_done >= work_to_do) if (*work_done >= work_to_do)
...@@ -3537,8 +3537,6 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter, ...@@ -3537,8 +3537,6 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter,
prefetch(next_rxd); prefetch(next_rxd);
next_buffer = &rx_ring->buffer_info[i]; next_buffer = &rx_ring->buffer_info[i];
next_skb = next_buffer->skb;
prefetch(next_skb->data - NET_IP_ALIGN);
cleaned = TRUE; cleaned = TRUE;
cleaned_count++; cleaned_count++;
...@@ -3668,7 +3666,7 @@ e1000_clean_rx_irq_ps(struct e1000_adapter *adapter, ...@@ -3668,7 +3666,7 @@ e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
struct e1000_buffer *buffer_info, *next_buffer; struct e1000_buffer *buffer_info, *next_buffer;
struct e1000_ps_page *ps_page; struct e1000_ps_page *ps_page;
struct e1000_ps_page_dma *ps_page_dma; struct e1000_ps_page_dma *ps_page_dma;
struct sk_buff *skb, *next_skb; struct sk_buff *skb;
unsigned int i, j; unsigned int i, j;
uint32_t length, staterr; uint32_t length, staterr;
int cleaned_count = 0; int cleaned_count = 0;
...@@ -3697,8 +3695,6 @@ e1000_clean_rx_irq_ps(struct e1000_adapter *adapter, ...@@ -3697,8 +3695,6 @@ e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
prefetch(next_rxd); prefetch(next_rxd);
next_buffer = &rx_ring->buffer_info[i]; next_buffer = &rx_ring->buffer_info[i];
next_skb = next_buffer->skb;
prefetch(next_skb->data - NET_IP_ALIGN);
cleaned = TRUE; cleaned = TRUE;
cleaned_count++; cleaned_count++;
......
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