Mike Marciniszyn 72f53af265 IB/hfi1: Fix defered ack race with qp destroy ... There is a a bug in defered ack stuff that causes a race with the destroy of a QP. A packet causes a defered ack to be pended by putting the QP into an rcd queue. A return from the driver interrupt processing will process that rcd queue of QPs and attempt to do a direct send of the ack. At this point no locks are held and the above QP could now be put in the reset state in the qp destroy logic. A refcount protects the QP while it is in the rcd queue so it isn't going anywhere yet. If the direct send fails to allocate a pio buffer, hfi1_schedule_send() is called to trigger sending an ack from the send engine. There is no state test in that code path. The refcount is then dropped from the driver.c caller potentially allowing the qp destroy to continue from its refcount wait in parallel with the workqueue scheduling of the qp. Cc: stable@vger.kernel.org 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>		2016-10-02 08:42:14 -04:00
..
affinity.c	IB/hfi1: Fix locking scheme for affinity settings	2016-10-02 08:42:08 -04:00
affinity.h	IB/hfi1: Fix locking scheme for affinity settings	2016-10-02 08:42:08 -04:00
aspm.h
chip_registers.h	IB/hfi1: Read all firmware versions	2016-08-02 16:00:58 -04:00
chip.c	IB/hfi1: Fix user-space buffers mapping with IOMMU enabled	2016-10-02 08:42:07 -04:00
chip.h	IB/qib,IB/hfi: Use core common header file	2016-10-02 08:42:06 -04:00
common.h	IB/qib,IB/hfi: Use core common header file	2016-10-02 08:42:06 -04:00
debugfs.c	IB/hfi1: Rework debugfs to use SRCU	2016-09-02 14:26:55 -04:00
debugfs.h
device.c
device.h
dma.c
driver.c	IB/qib,IB/hfi: Use core common header file	2016-10-02 08:42:06 -04:00
efivar.c
efivar.h
eprom.c
eprom.h
file_ops.c	IB/hfi1: Fix user-space buffers mapping with IOMMU enabled	2016-10-02 08:42:07 -04:00
firmware.c	IB/hfi1: Read all firmware versions	2016-08-02 16:00:58 -04:00
hfi.h	IB/hfi1: Fix user-space buffers mapping with IOMMU enabled	2016-10-02 08:42:07 -04:00
init.c	IB/hfi1: Fix user-space buffers mapping with IOMMU enabled	2016-10-02 08:42:07 -04:00
intr.c
iowait.h
Kconfig	Second round of merge items for 4.8	2016-08-04 20:26:31 -04:00
mad.c	IB/hfi1: Remove filtering of Set(PkeyTable) in HFI SMA	2016-10-02 08:42:12 -04:00
mad.h	IB/hfi1: Clean up port state structure definition	2016-08-02 12:00:54 -04:00
Makefile	IB/hfi1: Remove TWSI references	2016-08-02 15:47:42 -04:00
mmu_rb.c	IB/hfi1: Add cache evict LRU list	2016-08-02 22:46:21 -04:00
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: Add static PCIe Gen3 CTLE tuning	2016-08-02 16:00:58 -04:00
pio_copy.c	IB/hfi1: Combine shift copy and byte copy for SGE reads	2016-10-02 08:42:14 -04:00
pio.c	IB/hfi1: Fix user-space buffers mapping with IOMMU enabled	2016-10-02 08:42:07 -04:00
pio.h	IB/hfi1: Fix user-space buffers mapping with IOMMU enabled	2016-10-02 08:42:07 -04:00
platform.c	IB/hfi1: Reset QSFP on every run through channel tuning	2016-08-02 16:00:58 -04:00
platform.h
qp.c	IB/rdmavt, IB/hfi1: Add lockdep asserts for lock debug	2016-10-02 08:42:10 -04:00
qp.h	IB/hfi1: Rename struct ahg_ib_header to struct hfi1_ahg_info	2016-08-02 16:00:58 -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	IB/hfi1: Fix defered ack race with qp destroy	2016-10-02 08:42:14 -04:00
ruc.c	IB/qib,IB/hfi: Use core common header file	2016-10-02 08:42:06 -04:00
sdma_txreq.h
sdma.c	IB/hfi1: Fix the count of user packets submitted to an SDMA engine	2016-10-02 08:42:07 -04:00
sdma.h	IB/hfi1: Fix the count of user packets submitted to an SDMA engine	2016-10-02 08:42:07 -04:00
sysfs.c	IB/hfi1: Add sysfs entry to override SDMA interrupt affinity	2016-08-02 16:00:58 -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/qib,IB/hfi: Use core common header file	2016-10-02 08:42:06 -04:00
trace_misc.h	IB/hfi1: Separate tracepoints into specific headers	2016-08-02 12:00:54 -04:00
trace_rc.h	IB/hfi1: Separate tracepoints into specific headers	2016-08-02 12:00:54 -04:00
trace_rx.h	IB/qib,IB/hfi: Use core common header file	2016-10-02 08:42:06 -04:00
trace_tx.h	IB/hfi1: Fix trace sparse errors	2016-08-02 12:00:54 -04:00
trace.c	IB/qib,IB/hfi: Use core common header file	2016-10-02 08:42:06 -04:00
trace.h	IB/hfi1: Separate tracepoints into specific headers	2016-08-02 12:00:54 -04:00
uc.c	IB/hfi1: Consolidate pio control masks into single definition	2016-10-02 08:42:11 -04:00
ud.c	IB/qib,IB/hfi: Use core common header file	2016-10-02 08:42:06 -04:00
user_exp_rcv.c	IB/hfi1: Fix memory leak during unexpected shutdown	2016-08-02 22:46:21 -04:00
user_exp_rcv.h
user_pages.c	IB/hfi1: Make use of mm consistent	2016-08-02 22:46:21 -04:00
user_sdma.c	IB/hfi1: Fix the count of user packets submitted to an SDMA engine	2016-10-02 08:42:07 -04:00
user_sdma.h	IB/hfi1: Use evict mmu rb operation	2016-08-02 22:46:21 -04:00
verbs_txreq.c	IB/rdmavt, IB/qib, IB/hfi1: Use new QP put get routines	2016-09-16 14:35:27 -04:00
verbs_txreq.h	IB/hfi1: Rename hfi1_pio_header to hfi1_sdma_header.	2016-08-02 16:00:58 -04:00
verbs.c	IB/hfi1: Increase default settings of max_cqes and max_qps	2016-10-02 08:42:12 -04:00
verbs.h	IB/hfi1: Consolidate pio control masks into single definition	2016-10-02 08:42:11 -04:00