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4061f3a4da
linux/drivers/infiniband/hw/hfi1
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Michael J. Ruhl 4061f3a4da IB/hfi1: Race condition between user notification and driver state 
The handler for link init state (HLS_UP_INIT) notifies userspace
(update_statusp()) before enabling the device
(RCV_CTRL_RCV_PORT_ENABLE_SMASK) or setting the device state
(ppd->host_link_state).  This causes a race condition where the
userspace thinks the interface is in the INIT state before the driver
has set that state.

Rework the code path to eliminate the race.

Delay setting the init state until after a HW settling period.

Reviewed-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-10-30 14:51:36 -04:00
..
affinity.c IB/hfi1: Replace deprecated pci functions with new API 2017-06-27 16:58:11 -04:00
affinity.h IB/hfi1: Name function prototype parameters for affinity module 2017-06-27 16:56:33 -04:00
aspm.h IB/hfi1: Convert timers to use timer_setup() 2017-10-18 11:48:19 -04:00
chip_registers.h RDMA/hfi1: Defer setting VL15 credits to link-up interrupt 2017-06-01 17:04:20 -04:00
chip.c IB/hfi1: Race condition between user notification and driver state 2017-10-30 14:51:36 -04:00
chip.h Merge branch 'for-next-early' into for-next 2017-10-18 13:07:13 -04:00
common.h IB/hfi1: Eliminate allocation while atomic 2017-10-18 10:12:59 -04:00
debugfs.c IB/hfi1: Add a safe wrapper for _rcd_get_by_index 2017-09-27 11:34:13 -04:00
debugfs.h IB/hfi1: Add transmit fault injection feature 2017-04-05 14:45:09 -04:00
device.c infiniband: utilize the new cdev_set_parent function 2017-03-21 06:44:33 +01:00
device.h
driver.c Merge branch 'timer_setup' into for-next 2017-10-18 13:12:09 -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: Check eeprom config partition validity 2017-09-27 11:10:36 -04:00
eprom.h IB/hfi1: Add ability to read platform config from the EPROM 2016-10-02 08:42:20 -04:00
exp_rcv.c IB/hfi1: Initialize TID lists to avoid crash on cleanup 2017-06-27 16:58:13 -04:00
exp_rcv.h IB/hfi1: Fix bar0 mapping to use write combining 2017-07-31 15:17:54 -04:00
file_ops.c Merge branch 'for-next-early' into for-next 2017-10-18 13:07:13 -04:00
firmware.c IB/hfi1: Add MODULE_FIRMWARE statements 2017-10-18 10:24:02 -04:00
hfi.h IB/hfi1: Define hfi1_handle_cnp_tbl[] once 2017-10-14 20:47:06 -04:00
init.c Merge branch 'timer_setup' into for-next 2017-10-18 13:12:09 -04:00
intr.c IB/hfi1: Race condition between user notification and driver state 2017-10-30 14:51:36 -04:00
iowait.h IB/hfi1: Serve the most starved iowait entry first 2017-07-31 15:17:54 -04:00
Kconfig IB/hfi1: Remove HFI1_VERBS_31BIT_PSN option 2017-08-22 14:22:38 -04:00
mad.c Merge branch 'timer_setup' into for-next 2017-10-18 13:12:09 -04:00
mad.h IB/hfi1: Convert timers to use timer_setup() 2017-10-18 11:48:19 -04:00
Makefile IB/hfi1: Create common expected receive verbs/PSM code 2017-06-27 16:58:13 -04:00
mmu_rb.c lib/interval_tree: fast overlap detection 2017-09-08 18:26:49 -07:00
mmu_rb.h IB/hfi1: Don't remove RB entry when not needed. 2017-06-27 16:56:33 -04:00
opa_compat.h IB/hfi1: Document phys port state bits not used in IB 2017-08-22 14:22:37 -04:00
pcie.c IB/hfi1: Unsuccessful PCIe caps tuning should not fail driver load 2017-09-27 11:10:36 -04:00
pio_copy.c IB/hfi1: Optimize pio_buf and send_context structs 2016-11-15 16:37:27 -05:00
pio.c IB/hfi1: Create workqueue for link events 2017-07-31 15:18:38 -04:00
pio.h IB/hfi: Fix up comments in engine mapping 2017-04-25 15:24:51 -04:00
platform.c IB/hfi1: Only reset QSFP after link up and turn off AOC TX 2017-09-27 11:10:36 -04:00
platform.h IB/hfi1: Define platform_config_table_limits once 2016-12-11 15:29:42 -05:00
qp.c IB/hfi1: Convert qp_stats debugfs interface to use new iterator API 2017-08-28 19:12:30 -04:00
qp.h IB/hfi1: Convert qp_stats debugfs interface to use new iterator API 2017-08-28 19:12:30 -04:00
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 Merge branch 'hfi1' into k.o/for-next 2017-10-18 10:15:14 -04:00
ruc.c IB/hfi1: Remove set-but-not-used variables 2017-10-14 20:47:06 -04:00
sdma_txreq.h
sdma.c Merge branch 'timer_setup' into for-next 2017-10-18 13:12:09 -04:00
sdma.h IB/hfi1: Serve the most starved iowait entry first 2017-07-31 15:17:54 -04:00
sysfs.c IB/hfi1: Fix incorrect available receive user context count 2017-10-04 15:39:44 -04:00
trace_ctxts.h IB/hfi1: Clean up context initialization 2017-05-04 19:31:46 -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: Fix output trace issues from 16B change 2017-10-04 15:39:44 -04:00
trace_misc.h IB/hfi1: Add traces for TID operations 2017-06-27 16:58:13 -04:00
trace_mmu.h IB/hif1: Remove static tracing from SDMA hot path 2017-08-28 19:12:27 -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: Extend input hdr tracing for packet type 2017-09-27 11:34:13 -04:00
trace_tx.h IB/hif1: Remove static tracing from SDMA hot path 2017-08-28 19:12:27 -04:00
trace.c Merge branch 'hfi1' into k.o/for-next 2017-10-18 10:15:14 -04:00
trace.h IB/hfi1: Extend input hdr tracing for packet type 2017-09-27 11:34:13 -04:00
uc.c IB/hfi1: Set hdr_type when tx req is allocated 2017-10-18 10:13:00 -04:00
ud.c IB/hfi1: Remove set-but-not-used variables 2017-10-14 20:47:06 -04:00
user_exp_rcv.c IB/hfi1: Refactor hfi_user_exp_rcv_invalid() IOCTLs 2017-09-29 11:08:06 -04:00
user_exp_rcv.h IB/hfi1: Move structure definitions from user_exp_rcv.c to user_exp_rcv.h 2017-08-28 19:12:22 -04:00
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: Remove the debug trace message in pin_sdma_pages() 2017-09-27 11:34:13 -04:00
user_sdma.h IB/hfi1: Convert the macro AHG_HEADER_SET into an inline function 2017-09-27 11:34:13 -04:00
verbs_txreq.c IB/hfi1: Improve local kmem_cache_alloc performance 2017-08-28 19:12:18 -04:00
verbs_txreq.h IB/hfi1: Set hdr_type when tx req is allocated 2017-10-18 10:13:00 -04:00
verbs.c Merge branch 'timer_setup' into for-next 2017-10-18 13:12:09 -04:00
verbs.h IB/hfi1: Remove HFI1_VERBS_31BIT_PSN option 2017-08-22 14:22:38 -04:00
vnic_main.c IB/hfi1: Fix incorrect available receive user context count 2017-10-04 15:39:44 -04:00
vnic_sdma.c IB/hfi1: Improve local kmem_cache_alloc performance 2017-08-28 19:12:18 -04:00
vnic.h IB/hfi1: Add support to receive 16B bypass packets 2017-08-22 14:22:37 -04:00