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authorKai Makisara <Kai.Makisara@kolumbus.fi>2005-08-02 06:40:47 -0400
committerJames Bottomley <jejb@mulgrave.(none)>2005-08-08 10:33:48 -0400
commitf03a567054fea4f9d43c50ec91338266c0bd588d (patch)
tree97b3258660d52dc0359d50f27b5f593c935c9012 /include
parent5262d0851cc6692390ee1aa2c55f57f3bfd0a7c7 (diff)
[SCSI] drivers/scsi/st.c: add reference count and related fixes
I have rediffed the patch against 2.6.13-rc5, done a couple of cosmetic cleanups, and run some tests. Brian King has acknowledged that it fixes the problems he has seen. Seems mature enough for inclusion into 2.6.14 (or later)? Nate's explanation of the changes: I've attached patches against 2.6.13rc2. These are basically identical to my earlier patches, as I found that all issues I'd seen in earlier kernels still existed in this kernel. To summarize, the changes are: (more details in my original email) - add a kref to the scsi_tape structure, and associate reference counting stuff - set sr_request->end_io = blk_end_sync_rq so we get notified when an IO is rejected when the device goes away - check rq_status when IOs complete, else we don't know that IOs rejected for a dead device in fact did not complete - change last_SRpnt so it's set before an async IO is issued (in case st_sleep_done is bypassed) - fix a bogus use of last_SRpnt in st_chk_result Signed-off-by: Nate Dailey <nate.dailey@stratus.com> Signed-off-by: Kai Makisara <kai.makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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