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[SCSI] bfa: Fix for bcu or hcm faa query hang 

This patch set fixes the issue of brocade management utility hang
(bcu/HCM) when faa attributes are queried from multiple application
threads. Hang was due to race between the threads and completion handler
corruption.

Signed-off-by: Vijaya Mohan Guvva <vmohan@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Vijaya Mohan Guvva 2013-11-21 01:37:46 -08:00 committed by James Bottomley
parent 9781851f47
commit 7593e52425
1 changed files with 4 additions and 4 deletions
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8
drivers/scsi/bfa/bfa_core.c
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@ -1367,10 +1367,6 @@ bfa_faa_query(struct bfa_s *bfa, struct bfa_faa_attr_s *attr,
struct bfa_iocfc_s *iocfc = &bfa->iocfc;
bfa_status_t status;
iocfc->faa_args.faa_attr = attr;
iocfc->faa_args.faa_cb.faa_cbfn = cbfn;
iocfc->faa_args.faa_cb.faa_cbarg = cbarg;
status = bfa_faa_validate_request(bfa);
if (status != BFA_STATUS_OK)
return status;
@ -1378,6 +1374,10 @@ bfa_faa_query(struct bfa_s *bfa, struct bfa_faa_attr_s *attr,
if (iocfc->faa_args.busy == BFA_TRUE)
return BFA_STATUS_DEVBUSY;
iocfc->faa_args.faa_attr = attr;
iocfc->faa_args.faa_cb.faa_cbfn = cbfn;
iocfc->faa_args.faa_cb.faa_cbarg = cbarg;
iocfc->faa_args.busy = BFA_TRUE;
memset(&faa_attr_req, 0, sizeof(struct bfi_faa_query_s));
bfi_h2i_set(faa_attr_req.mh, BFI_MC_IOCFC,