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OpenCloudOS-Kernel
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[SCSI] bnx2fc: Call bnx2fc_return_rqe and bnx2fc_get_next_rqe with tgt lock held 

tgt lock is needed during -
        bnx2fc_return_rqe to protect the rq_prod_idx.
        bnx2fc_get_next_rqe to protect rq_cons_idx

Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Nithin Sujir 2011-03-17 17:13:31 -07:00 committed by James Bottomley
parent 0ea5c27583
commit 686959736a
1 changed files with 11 additions and 2 deletions
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13
drivers/scsi/bnx2fc/bnx2fc_hwi.c
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@ -590,7 +590,10 @@ static void bnx2fc_process_unsol_compl(struct bnx2fc_rport *tgt, u16 wqe)
num_rq = (frame_len + BNX2FC_RQ_BUF_SZ - 1) / BNX2FC_RQ_BUF_SZ;
spin_lock_bh(&tgt->tgt_lock);
rq_data = (unsigned char *)bnx2fc_get_next_rqe(tgt, num_rq);
spin_unlock_bh(&tgt->tgt_lock);
if (rq_data) {
buf = rq_data;
} else {
@ -603,8 +606,10 @@ static void bnx2fc_process_unsol_compl(struct bnx2fc_rport *tgt, u16 wqe)
}
for (i = 0; i < num_rq; i++) {
spin_lock_bh(&tgt->tgt_lock);
rq_data = (unsigned char *)
bnx2fc_get_next_rqe(tgt, 1);
spin_unlock_bh(&tgt->tgt_lock);
len = BNX2FC_RQ_BUF_SZ;
memcpy(buf1, rq_data, len);
buf1 += len;
@ -615,13 +620,15 @@ static void bnx2fc_process_unsol_compl(struct bnx2fc_rport *tgt, u16 wqe)
if (buf != rq_data)
kfree(buf);
spin_lock_bh(&tgt->tgt_lock);
bnx2fc_return_rqe(tgt, num_rq);
spin_unlock_bh(&tgt->tgt_lock);
break;
case FCOE_ERROR_DETECTION_CQE_TYPE:
/*
*In case of error reporting CQE a single RQ entry
* is consumes.
* In case of error reporting CQE a single RQ entry
* is consumed.
*/
spin_lock_bh(&tgt->tgt_lock);
num_rq = 1;
@ -705,6 +712,7 @@ static void bnx2fc_process_unsol_compl(struct bnx2fc_rport *tgt, u16 wqe)
*In case of warning reporting CQE a single RQ entry
* is consumes.
*/
spin_lock_bh(&tgt->tgt_lock);
num_rq = 1;
err_entry = (struct fcoe_err_report_entry *)
bnx2fc_get_next_rqe(tgt, 1);
@ -717,6 +725,7 @@ static void bnx2fc_process_unsol_compl(struct bnx2fc_rport *tgt, u16 wqe)
err_entry->tx_buf_off, err_entry->rx_buf_off);
bnx2fc_return_rqe(tgt, 1);
spin_unlock_bh(&tgt->tgt_lock);
break;
default: