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Mike Marciniszyn e3cea38357 IB/hfi1: Prevent kernel QP post send hard lockups ... commit b6eac931b9 upstream. 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(). 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2017-05-20 14:28:38 +02:00
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core	IB/core: For multicast functions, verify that LIDs are multicast LIDs	2017-05-20 14:28:38 +02:00
hw	IB/hfi1: Prevent kernel QP post send hard lockups	2017-05-20 14:28:38 +02:00
sw	IB/rxe: Fix mem_check_range integer overflow	2017-02-14 15:25:42 -08:00
ulp	IB/IPoIB: ibX: failed to create mcg debug file	2017-05-20 14:28:38 +02:00
Kconfig	qedr: Add RoCE driver framework	2016-10-14 15:00:10 -04:00
Makefile	IB/rdmavt: Create module framework and handle driver registration	2016-03-10 20:37:04 -05:00