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[SCSI] ipr: Stop reading adapter dump prematurely

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When the ipr driver decides to dump the adapter, it changes the
sdt_state to GET_DUMP, then prepares the adapter so that the dump
can be read. However, if the ipr worker thread wakes up for some
reason before the driver has put the adapter in a state where it
can succesfully dump the adapter, the driver will start dumping
the adapter too early, which can potentially trigger a BUG check
in the pci config blocking API. Fix this by adding a new
sdt_state to differentiate between the ipr driver wanting to dump
the adapter in the near future and wanting to dump the adapter now.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Brian King
2011-09-21 08:51:11 -05:00
committed by James Bottomley
parent 5f7a643304
commit 41e9a69641
2 changed files with 12 additions and 4 deletions
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drivers/scsi/ipr.h
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@@ -1360,6 +1360,7 @@ enum ipr_sdt_state {
INACTIVE,
WAIT_FOR_DUMP,
GET_DUMP,
READ_DUMP,
ABORT_DUMP,
DUMP_OBTAINED
};