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| author | Harini Katakam <harini.katakam@xilinx.com> | 2019-05-07 19:59:10 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-16 19:40:28 +0200 |
| commit | 224b04c9e0284988a14d253e5663a77ffb5a5262 (patch) | |
| tree | 9ff09bfe3bb91301d1bc74b619fac17fe53005c5 /scripts/gcc-plugins/cyc_complexity_plugin.c | |
| parent | a3bf31d7ffb276e6c6fbd0f51ca8a80dcb5d1b2e (diff) | |
net: macb: Change interrupt and napi enable order in open
[ Upstream commit 0504453139ef5a593c9587e1e851febee859c7d8 ]
Current order in open:
-> Enable interrupts (macb_init_hw)
-> Enable NAPI
-> Start PHY
Sequence of RX handling:
-> RX interrupt occurs
-> Interrupt is cleared and interrupt bits disabled in handler
-> NAPI is scheduled
-> In NAPI, RX budget is processed and RX interrupts are re-enabled
With the above, on QEMU or fixed link setups (where PHY state doesn't
matter), there's a chance macb RX interrupt occurs before NAPI is
enabled. This will result in NAPI being scheduled before it is enabled.
Fix this macb open by changing the order.
Fixes: ae1f2a56d273 ("net: macb: Added support for many RX queues")
Signed-off-by: Harini Katakam <harini.katakam@xilinx.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts/gcc-plugins/cyc_complexity_plugin.c')
0 files changed, 0 insertions, 0 deletions