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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b6eac931b9
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
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| .. | ||
| affinity.c | ||
| affinity.h | ||
| aspm.h | ||
| chip_registers.h | ||
| chip.c | ||
| chip.h | ||
| common.h | ||
| debugfs.c | ||
| debugfs.h | ||
| device.c | ||
| device.h | ||
| driver.c | ||
| efivar.c | ||
| efivar.h | ||
| eprom.c | ||
| eprom.h | ||
| file_ops.c | ||
| firmware.c | ||
| hfi.h | ||
| init.c | ||
| intr.c | ||
| iowait.h | ||
| Kconfig | ||
| mad.c | ||
| mad.h | ||
| Makefile | ||
| mmu_rb.c | ||
| mmu_rb.h | ||
| opa_compat.h | ||
| pcie.c | ||
| pio_copy.c | ||
| pio.c | ||
| pio.h | ||
| platform.c | ||
| platform.h | ||
| qp.c | ||
| qp.h | ||
| qsfp.c | ||
| qsfp.h | ||
| rc.c | ||
| ruc.c | ||
| sdma_txreq.h | ||
| sdma.c | ||
| sdma.h | ||
| sysfs.c | ||
| trace_ctxts.h | ||
| trace_dbg.h | ||
| trace_ibhdrs.h | ||
| trace_misc.h | ||
| trace_rc.h | ||
| trace_rx.h | ||
| trace_tx.h | ||
| trace.c | ||
| trace.h | ||
| uc.c | ||
| ud.c | ||
| user_exp_rcv.c | ||
| user_exp_rcv.h | ||
| user_pages.c | ||
| user_sdma.c | ||
| user_sdma.h | ||
| verbs_txreq.c | ||
| verbs_txreq.h | ||
| verbs.c | ||
| verbs.h | ||
| vnic_main.c | ||
| vnic_sdma.c | ||
| vnic.h | ||