AuxXxilium/linux_dsm_epyc7002
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b6eac931b9
linux_dsm_epyc7002/drivers/infiniband/hw/hfi1
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Mike Marciniszyn b6eac931b9 IB/hfi1: Prevent kernel QP post send hard lockups 
The driver progress routines can call cond_resched() when
a timeslice is exhausted and irqs are enabled.

If the ULP had been holding a spin lock without disabling irqs and
the post send directly called the progress routine, the cond_resched()
could yield allowing another thread from the same ULP to deadlock
on that same lock.

Correct by replacing the current hfi1_do_send() calldown with a unique
one for post send and adding an argument to hfi1_do_send() to indicate
that the send engine is running in a thread.   If the routine is not
running in a thread, avoid calling cond_resched().

CC: <stable@vger.kernel.org> # 4.7.x-
Fixes: Commit 831464ce4b ("IB/hfi1: Don't call cond_resched in atomic mode when sending packets")
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-04-28 13:48:01 -04:00
..
affinity.c sched/core: Remove the tsk_cpus_allowed() wrapper 2017-03-02 08:42:24 +01:00
affinity.h Updates for 4.10 kernel merge window 2016-12-15 12:03:32 -08:00
aspm.h IB/hfi1: Virtual Network Interface Controller (VNIC) HW support 2017-04-20 15:19:35 -04:00
chip_registers.h IB/hfi1: Add active channel and backplane support for integrated devices 2016-11-15 16:37:27 -05:00
chip.c IB/hfi1: Virtual Network Interface Controller (VNIC) HW support 2017-04-20 15:19:35 -04:00
chip.h IB/hfi1: Virtual Network Interface Controller (VNIC) HW support 2017-04-20 15:19:35 -04:00
common.h IB/hfi1: Use defines from common headers 2017-04-28 13:48:01 -04:00
debugfs.c IB/hfi1: Virtual Network Interface Controller (VNIC) HW support 2017-04-20 15:19:35 -04:00
debugfs.h IB/hfi1: Add transmit fault injection feature 2017-04-05 14:45:09 -04:00
device.c
device.h
driver.c IB/hfi1: Use defines from common headers 2017-04-28 13:48:01 -04:00
efivar.c IB/hfi1: Check upper-case EFI variables 2017-02-19 09:18:37 -05:00
efivar.h
eprom.c IB/hfi1: Read new EPROM format 2016-12-11 15:25:13 -05:00
eprom.h IB/hfi1: Add ability to read platform config from the EPROM 2016-10-02 08:42:20 -04:00
file_ops.c IB/hfi1: Virtual Network Interface Controller (VNIC) HW support 2017-04-20 15:19:35 -04:00
firmware.c IB/hfi1: Add a patch value to the firmware version string 2017-04-05 14:45:09 -04:00
hfi.h IB/hfi1: Use defines from common headers 2017-04-28 13:48:01 -04:00
init.c IB/hfi1: VNIC SDMA support 2017-04-20 15:19:41 -04:00
intr.c
iowait.h IB/hfi1: Add unique txwait_lock for txreq events 2016-11-15 16:25:59 -05:00
Kconfig Second round of merge items for 4.8 2016-08-04 20:26:31 -04:00
mad.c IB/hfi1: Return SC2VL mappings to FM with VL15 instead of ILLEGAL_VL 2017-04-28 13:48:01 -04:00
mad.h IB/hfi1: Clean up port state structure definition 2016-08-02 12:00:54 -04:00
Makefile IB/hfi1: VNIC SDMA support 2017-04-20 15:19:41 -04:00
mmu_rb.c IB/hfi1: constify mmu_notifier_ops structure 2016-12-11 15:29:42 -05:00
mmu_rb.h IB/hfi1: Remove unneeded mm argument in remove function 2016-08-02 22:46:21 -04:00
opa_compat.h
pcie.c IB/hfi1: Use static CTLE with Preset 6 for integrated HFIs 2017-02-19 09:18:34 -05:00
pio_copy.c IB/hfi1: Optimize pio_buf and send_context structs 2016-11-15 16:37:27 -05:00
pio.c IB/hfi1: Virtual Network Interface Controller (VNIC) HW support 2017-04-20 15:19:35 -04:00
pio.h IB/hfi: Fix up comments in engine mapping 2017-04-25 15:24:51 -04:00
platform.c IB/hfi1: Add special setting for low power AOC 2016-12-11 15:29:42 -05:00
platform.h IB/hfi1: Define platform_config_table_limits once 2016-12-11 15:29:42 -05:00
qp.c IB/hfi1: Use new rdmavt timers 2017-02-19 09:18:39 -05:00
qp.h IB/hfi1, qib, rdmavt: Move AETH credit functions into rdmavt 2017-02-19 09:18:38 -05:00
qsfp.c IB/hfi1: Extend i2c timeout 2016-10-02 08:42:13 -04:00
qsfp.h IB/hfi1: Fetch monitor values on-demand for CableInfo query 2016-08-22 14:31:41 -04:00
rc.c IB/hfi1: Use defines from common headers 2017-04-28 13:48:01 -04:00
ruc.c IB/hfi1: Prevent kernel QP post send hard lockups 2017-04-28 13:48:01 -04:00
sdma_txreq.h
sdma.c IB/hfi1: Ensure VL index is within bounds 2017-04-05 14:45:09 -04:00
sdma.h IB/hfi: Fix up comments in engine mapping 2017-04-25 15:24:51 -04:00
sysfs.c IB/hfi1: Virtual Network Interface Controller (VNIC) HW support 2017-04-20 15:19:35 -04:00
trace_ctxts.h IB/hfi1: Fix user-space buffers mapping with IOMMU enabled 2016-10-02 08:42:07 -04:00
trace_dbg.h IB/hfi1: Separate tracepoints into specific headers 2016-08-02 12:00:54 -04:00
trace_ibhdrs.h IB/hfi1: Use defines from common headers 2017-04-28 13:48:01 -04:00
trace_misc.h IB/hfi1: Add receive fault injection feature 2017-04-05 14:45:09 -04:00
trace_rc.h IB/rdmavt, IB/hfi1: Fix timer migration regressions 2017-04-05 14:45:09 -04:00
trace_rx.h IB/hfi1: Remove leftover snoop references 2016-11-15 16:16:43 -05:00
trace_tx.h IB/rdmavt: Add swqe completion trace 2017-04-05 14:45:09 -04:00
trace.c IB/hfi1: Add functions to parse 9B headers 2017-04-28 13:48:01 -04:00
trace.h IB/hfi1: Separate tracepoints into specific headers 2016-08-02 12:00:54 -04:00
uc.c IB/hfi1: Add functions to parse 9B headers 2017-04-28 13:48:01 -04:00
ud.c IB/hfi1: Use defines from common headers 2017-04-28 13:48:01 -04:00
user_exp_rcv.c IB/hfi1: Validate the TID count before using it 2017-04-28 13:48:01 -04:00
user_exp_rcv.h
user_pages.c IB/hfi1: Virtual Network Interface Controller (VNIC) HW support 2017-04-20 15:19:35 -04:00
user_sdma.c IB/hfi1: Coding style improvement (make sizeof use safer) 2017-04-20 16:25:04 -04:00
user_sdma.h IB/hfi1: Use evict mmu rb operation 2016-08-02 22:46:21 -04:00
verbs_txreq.c IB/hfi1: Add unique txwait_lock for txreq events 2016-11-15 16:25:59 -05:00
verbs_txreq.h IB/hfi1: Remove dependence on qp->s_cur_size 2016-12-11 15:25:13 -05:00
verbs.c IB/hfi1: Prevent kernel QP post send hard lockups 2017-04-28 13:48:01 -04:00
verbs.h IB/hfi1: Prevent kernel QP post send hard lockups 2017-04-28 13:48:01 -04:00
vnic_main.c IB/hfi1: VNIC SDMA support 2017-04-20 15:19:41 -04:00
vnic_sdma.c IB/hfi1: VNIC SDMA support 2017-04-20 15:19:41 -04:00
vnic.h IB/hfi1: VNIC SDMA support 2017-04-20 15:19:41 -04:00