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authorHeiner Kallweit <hkallweit1@gmail.com>2018-10-18 19:56:01 +0200
committerDavid S. Miller <davem@davemloft.net>2018-10-18 11:33:29 -0700
commit6b839b6cf9eada30b086effb51e5d6076bafc761 (patch)
treeff03cc172c8ac189df65e1134bc6400a88907217
parent2ee653f644ab203364724cac85a7efd371367979 (diff)
downloadlinux-stericsson-6b839b6cf9eada30b086effb51e5d6076bafc761.tar.gz
r8169: fix NAPI handling under high load
rtl_rx() and rtl_tx() are called only if the respective bits are set in the interrupt status register. Under high load NAPI may not be able to process all data (work_done == budget) and it will schedule subsequent calls to the poll callback. rtl_ack_events() however resets the bits in the interrupt status register, therefore subsequent calls to rtl8169_poll() won't call rtl_rx() and rtl_tx() - chip interrupts are still disabled. Fix this by calling rtl_rx() and rtl_tx() independent of the bits set in the interrupt status register. Both functions will detect if there's nothing to do for them. Fixes: da78dbff2e05 ("r8169: remove work from irq handler.") Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/realtek/r8169.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 28184b984a44..2c350099b83c 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -6549,17 +6549,15 @@ static int rtl8169_poll(struct napi_struct *napi, int budget)
struct rtl8169_private *tp = container_of(napi, struct rtl8169_private, napi);
struct net_device *dev = tp->dev;
u16 enable_mask = RTL_EVENT_NAPI | tp->event_slow;
- int work_done= 0;
+ int work_done;
u16 status;
status = rtl_get_events(tp);
rtl_ack_events(tp, status & ~tp->event_slow);
- if (status & RTL_EVENT_NAPI_RX)
- work_done = rtl_rx(dev, tp, (u32) budget);
+ work_done = rtl_rx(dev, tp, (u32) budget);
- if (status & RTL_EVENT_NAPI_TX)
- rtl_tx(dev, tp);
+ rtl_tx(dev, tp);
if (status & tp->event_slow) {
enable_mask &= ~tp->event_slow;