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55e802468e
Yury reported a crash in the sfc driver originated from
netpoll_send_udp(). The netconsole sends a message and then netpoll
invokes the driver's NAPI function with a budget of zero. It is
dedicated to allow driver to free TX resources, that it may have used
while sending the packet.
In the netpoll case the driver invokes xdp_do_flush() unconditionally,
leading to crash because bpf_net_context was never assigned.
Invoke xdp_do_flush() only if budget is not zero.
Fixes:
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|---|---|---|
| .. | ||
| bitfield.h | ||
| efx_channels.c | ||
| efx_channels.h | ||
| efx_common.c | ||
| efx_common.h | ||
| efx.c | ||
| efx.h | ||
| enum.h | ||
| ethtool_common.c | ||
| ethtool_common.h | ||
| ethtool.c | ||
| farch_regs.h | ||
| farch.c | ||
| filter.h | ||
| io.h | ||
| Kconfig | ||
| Makefile | ||
| mcdi_mon.c | ||
| mcdi_pcol.h | ||
| mcdi_port_common.c | ||
| mcdi_port_common.h | ||
| mcdi_port.c | ||
| mcdi_port.h | ||
| mcdi.c | ||
| mcdi.h | ||
| mtd.c | ||
| net_driver.h | ||
| nic_common.h | ||
| nic.c | ||
| nic.h | ||
| ptp.c | ||
| ptp.h | ||
| rx_common.c | ||
| rx_common.h | ||
| rx.c | ||
| selftest.c | ||
| selftest.h | ||
| siena_sriov.c | ||
| siena_sriov.h | ||
| siena.c | ||
| sriov.h | ||
| tx_common.c | ||
| tx_common.h | ||
| tx.c | ||
| tx.h | ||
| vfdi.h | ||
| workarounds.h | ||