Íñigo Huguet ada74c5539 sfc: fix kernel panic when creating VF ... When creating VFs a kernel panic can happen when calling to efx_ef10_try_update_nic_stats_vf. When releasing a DMA coherent buffer, sometimes, I don't know in what specific circumstances, it has to unmap memory with vunmap. It is disallowed to do that in IRQ context or with BH disabled. Otherwise, we hit this line in vunmap, causing the crash: BUG_ON(in_interrupt()); This patch reenables BH to release the buffer. Log messages when the bug is hit: kernel BUG at mm/vmalloc.c:2727! invalid opcode: 0000 [#1] PREEMPT SMP NOPTI CPU: 6 PID: 1462 Comm: NetworkManager Kdump: loaded Tainted: G I --------- --- 5.14.0-119.el9.x86_64 #1 Hardware name: Dell Inc. PowerEdge R740/06WXJT, BIOS 2.8.2 08/27/2020 RIP: 0010:vunmap+0x2e/0x30 ...skip... Call Trace: __iommu_dma_free+0x96/0x100 efx_nic_free_buffer+0x2b/0x40 [sfc] efx_ef10_try_update_nic_stats_vf+0x14a/0x1c0 [sfc] efx_ef10_update_stats_vf+0x18/0x40 [sfc] efx_start_all+0x15e/0x1d0 [sfc] efx_net_open+0x5a/0xe0 [sfc] __dev_open+0xe7/0x1a0 __dev_change_flags+0x1d7/0x240 dev_change_flags+0x21/0x60 ...skip... Fixes: d778819609 ("sfc: DMA the VF stats only when requested") Reported-by: Ma Yuying <yuma@redhat.com> Signed-off-by: Íñigo Huguet <ihuguet@redhat.com> Acked-by: Edward Cree <ecree.xilinx@gmail.com> Link: https://lore.kernel.org/r/20220713092116.21238-1-ihuguet@redhat.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>		2022-07-14 12:46:56 +02:00
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falcon	net: allow gso_max_size to exceed 65536	2022-05-16 10:18:55 +01:00
siena	sfc/siena: fix wrong tx channel offset with efx_separate_tx_channels	2022-06-01 17:47:17 -07:00
bitfield.h
ef10.c	sfc: fix kernel panic when creating VF	2022-07-14 12:46:56 +02:00
ef10_regs.h
ef10_sriov.c	sfc: fix use after free when disabling sriov	2022-07-13 19:42:09 -07:00
ef10_sriov.h
ef100.c	sfc: add EF100 VF support via a write to sriov_numvfs	2022-04-29 18:43:01 -07:00
ef100.h
ef100_ethtool.c
ef100_ethtool.h
ef100_netdev.c
ef100_netdev.h
ef100_nic.c	net: allow gso_max_size to exceed 65536	2022-05-16 10:18:55 +01:00
ef100_nic.h
ef100_regs.h
ef100_rx.c	sfc: fix boolreturn.cocci warning and rename function	2020-08-24 18:14:23 -07:00
ef100_rx.h
ef100_sriov.c	sfc: add EF100 VF support via a write to sriov_numvfs	2022-04-29 18:43:01 -07:00
ef100_sriov.h	sfc: add EF100 VF support via a write to sriov_numvfs	2022-04-29 18:43:01 -07:00
ef100_tx.c
ef100_tx.h
efx.c	net: make drivers set the TSO limit not the GSO limit	2022-05-06 12:07:56 +01:00
efx.h	sfc: Remove duplicate definition of efx_xmit_done	2022-04-12 12:13:30 +02:00
efx_channels.c	sfc: fix wrong tx channel offset with efx_separate_tx_channels	2022-05-29 12:12:53 +01:00
efx_channels.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-05-12 16:15:30 -07:00
efx_common.c	sfc: Remove global definition of efx_reset_type_names	2022-04-12 12:13:30 +02:00
efx_common.h
enum.h
ethtool.c
ethtool_common.c
ethtool_common.h
farch_regs.h
filter.h
io.h
Kconfig	sfc/siena: Make MCDI logging support specific for Siena	2022-05-12 16:49:30 -07:00
Makefile	sfc: Add a basic Siena module	2022-05-10 15:38:15 -07:00
mcdi.c
mcdi.h
mcdi_filters.c
mcdi_filters.h
mcdi_functions.c
mcdi_functions.h
mcdi_mon.c
mcdi_pcol.h	sfc: Fix spelling mistake "writting" -> "writing"	2022-04-12 09:34:05 +02:00
mcdi_port.c
mcdi_port.h
mcdi_port_common.c
mcdi_port_common.h
mtd.c
net_driver.h	sfc: fix considering that all channels have TX queues	2022-05-29 12:12:53 +01:00
nic.c
nic.h	sfc: Disable Siena support	2022-05-04 11:18:08 +01:00
nic_common.h
ptp.c	net: sfc: fix memory leak due to ptp channel	2022-05-09 10:01:48 +01:00
ptp.h	net: sfc: fix memory leak due to ptp channel	2022-05-09 10:01:48 +01:00
rx.c
rx_common.c	sfc: Do not free an empty page_ring	2022-04-04 12:53:52 +01:00
rx_common.h
selftest.c
selftest.h
sriov.c
sriov.h
tx.c	sfc: use hardware tx timestamps for more than PTP	2022-04-08 14:43:10 -07:00
tx.h
tx_common.c	net: allow gso_max_size to exceed 65536	2022-05-16 10:18:55 +01:00
tx_common.h
tx_tso.c
vfdi.h
workarounds.h