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r8169: remove unneeded dirty_rx index 

After commit 6f0333b ("r8169: use 50% less ram for RX ring") the rx
ring buffers are always copied making dirty_rx useless.

Signed-off-by: Timo Teräs <timo.teras@iki.fi>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Timo Teräs 2013-01-15 21:01:24 +00:00 committed by David S. Miller
parent f92d318023
commit 9fba0812c1
1 changed files with 4 additions and 9 deletions
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13
drivers/net/ethernet/realtek/r8169.c
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@ -83,7 +83,7 @@ static const int multicast_filter_limit = 32;
#define R8169_REGS_SIZE 256
#define R8169_NAPI_WEIGHT 64
#define NUM_TX_DESC 64 /* Number of Tx descriptor registers */
#define NUM_RX_DESC 256 /* Number of Rx descriptor registers */
#define NUM_RX_DESC 256U /* Number of Rx descriptor registers */
#define R8169_TX_RING_BYTES (NUM_TX_DESC * sizeof(struct TxDesc))
#define R8169_RX_RING_BYTES (NUM_RX_DESC * sizeof(struct RxDesc))
@ -727,7 +727,6 @@ struct rtl8169_private {
u16 mac_version;
u32 cur_rx; /* Index into the Rx descriptor buffer of next Rx pkt. */
u32 cur_tx; /* Index into the Tx descriptor buffer of next Rx pkt. */
u32 dirty_rx;
u32 dirty_tx;
struct rtl8169_stats rx_stats;
struct rtl8169_stats tx_stats;
@ -4177,7 +4176,7 @@ static void rtl_init_rxcfg(struct rtl8169_private *tp)
static void rtl8169_init_ring_indexes(struct rtl8169_private *tp)
{
tp->dirty_tx = tp->dirty_rx = tp->cur_tx = tp->cur_rx = 0;
tp->dirty_tx = tp->cur_tx = tp->cur_rx = 0;
}
static void rtl_hw_jumbo_enable(struct rtl8169_private *tp)
@ -5920,7 +5919,7 @@ static void rtl8169_pcierr_interrupt(struct net_device *dev)
PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_SIG_TARGET_ABORT));
/* The infamous DAC f*ckup only happens at boot time */
if ((tp->cp_cmd & PCIDAC) && !tp->dirty_rx && !tp->cur_rx) {
if ((tp->cp_cmd & PCIDAC) && !tp->cur_rx) {
void __iomem *ioaddr = tp->mmio_addr;
netif_info(tp, intr, dev, "disabling PCI DAC\n");
@ -6035,10 +6034,8 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp, u32 budget
unsigned int count;
cur_rx = tp->cur_rx;
rx_left = NUM_RX_DESC + tp->dirty_rx - cur_rx;
rx_left = min(rx_left, budget);
for (; rx_left > 0; rx_left--, cur_rx++) {
for (rx_left = min(budget, NUM_RX_DESC); rx_left > 0; rx_left--, cur_rx++) {
unsigned int entry = cur_rx % NUM_RX_DESC;
struct RxDesc *desc = tp->RxDescArray + entry;
u32 status;
@ -6123,8 +6120,6 @@ process_pkt:
count = cur_rx - tp->cur_rx;
tp->cur_rx = cur_rx;
tp->dirty_rx += count;
return count;
}