[SCSI] qla2xxx: Explicitly tear-down vports during PCI remove_one().

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During internal testing, we've seen issues (hangs) with the
'deferred' vport tear-down-processing typically accompanied with
the fc_remove_host() call.  This is due to the current
implementation's back-end vport handling being performed by the
physical-HA's DPC thread where premature shutdown could lead to
latent vport requests without a processor.

This should also address a problem reported by Gal Rosen
(http://marc.info/?l=linux-scsi&m=121731664417358&w=2) where the
driver would attempt to awaken a previously torn-down DPC thread
from interrupt context by implicitly calling wake_up_process()
rather than the driver's qla2xxx_wake_dpc() helper.  Rather, than
reshuffle the remove_one() device-removal code, during unload,
depend on the driver's timer to wake-up the DPC process, by
limiting wake-ups based on an 'unloading' flag.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

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This commit is contained in:

Andrew Vasquez 2008-08-13 21:37:01 -07:00 • committed by James Bottomley

parent 19851f136a

commit c795c1e4b6

3 changed files with 12 additions and 4 deletions

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1

drivers/scsi/qla2xxx/qla_def.h

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2

drivers/scsi/qla2xxx/qla_mbx.c

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13

drivers/scsi/qla2xxx/qla_os.c

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