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| author | Bhanu Gollapudi <bprakash@broadcom.com> | 2011-03-17 17:13:26 -0700 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2011-03-23 11:36:59 -0500 |
| commit | 839900c69d5b8a07a4df8e9bd9d1e59a5c556811 (patch) | |
| tree | 067b746caab1ba5ee6d38c73a56df9f7bb953c9c | |
| parent | 70c7c88a1a65ca683eb7f3fe3ce79c72f29d845e (diff) | |
| download | blackbird-op-linux-839900c69d5b8a07a4df8e9bd9d1e59a5c556811.tar.gz blackbird-op-linux-839900c69d5b8a07a4df8e9bd9d1e59a5c556811.zip | |
[SCSI] bnx2fc: Avoid holding cq_lock when iounmap() is called
With kernel debugging enabled, holding cq_lock when calling
bnx2fc_free_session_resc() which calls iounmap() leads to a warning
stack trace [INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected].
iounmap() grabs a HARDIRQ-unsafe vmlist lock, so holding
spin_lock_bh(cq_lock) when calling iounmap() will trigger the LOCKDEP
warning. Since cq_lock is required only to guard against deletion, hold
the lock just before freeing the cq.
Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
| -rw-r--r-- | drivers/scsi/bnx2fc/bnx2fc_tgt.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/bnx2fc/bnx2fc_tgt.c b/drivers/scsi/bnx2fc/bnx2fc_tgt.c index 7ea93af60260..7cc05e4e82d5 100644 --- a/drivers/scsi/bnx2fc/bnx2fc_tgt.c +++ b/drivers/scsi/bnx2fc/bnx2fc_tgt.c @@ -304,10 +304,8 @@ static void bnx2fc_upload_session(struct fcoe_port *port, " not sent to FW\n"); /* Free session resources */ - spin_lock_bh(&tgt->cq_lock); bnx2fc_free_session_resc(hba, tgt); bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id); - spin_unlock_bh(&tgt->cq_lock); } static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt, @@ -830,11 +828,13 @@ static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba, tgt->rq = NULL; } /* Free CQ */ + spin_lock_bh(&tgt->cq_lock); if (tgt->cq) { dma_free_coherent(&hba->pcidev->dev, tgt->cq_mem_size, tgt->cq, tgt->cq_dma); tgt->cq = NULL; } + spin_unlock_bh(&tgt->cq_lock); /* Free SQ */ if (tgt->sq) { dma_free_coherent(&hba->pcidev->dev, tgt->sq_mem_size, |
