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Hold a refcount on the periph while running the allocation

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queue.  This will allow sub-transports to release their
probe pseudo-device with fewer convoluted restrictions.

Obtained from:	Netflix
This commit is contained in:
scottl 2018-01-09 21:23:16 +00:00
parent 976be87aea
commit ea3dced8e2
1 changed files with 2 additions and 0 deletions
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2
sys/cam/cam_xpt.c
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@ -3383,6 +3383,7 @@ xpt_run_allocq(struct cam_periph *periph, int sleep)
cam_periph_assert(periph, MA_OWNED);
if (periph->periph_allocating)
return;
cam_periph_doacquire(periph);
periph->periph_allocating = 1;
CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
device = periph->path->device;
@ -3426,6 +3427,7 @@ restart:
if (ccb != NULL)
xpt_release_ccb(ccb);
periph->periph_allocating = 0;
cam_periph_release_locked(periph);
}
static void