[SCSI] isci: Fix interrupt coalescing assumption of active TCs

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We always assign a dummy task context to a port in order to address a
silicon issue. We have 4 ports per controller. So when idle, there are always
exactly 4 TCs "active". The adaptive interrupt coalescing code uses number of
active TCs to figure out the coalescing values. However, we never hit "0" TCs
because of the 4 dummy TCs. Putting in fix so that we calculate this correctly.

Reported-by: Dan Melnic <dan@seamicro.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

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Dave Jiang 2012-09-05 16:35:44 -07:00 • committed by James Bottomley

parent 54b4667775

commit 44ef2bf72d

1 changed files with 8 additions and 2 deletions

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drivers/scsi/isci/host.c

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