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be2iscsi: Fix to synchronize tag allocation using spin_lock 

alloc_mcc_tag needs to be done under mcc_lock.

Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com>
Reviewed-by: Hannes Reinicke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Jitendra Bhivare 2016-01-20 14:10:48 +05:30 committed by Martin K. Petersen
parent cdde6682ab
commit 12843f0361
1 changed files with 4 additions and 2 deletions
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6
drivers/scsi/be2iscsi/be_cmds.c
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@ -121,6 +121,7 @@ unsigned int alloc_mcc_tag(struct beiscsi_hba *phba)
{
unsigned int tag = 0;
spin_lock(&phba->ctrl.mcc_lock);
if (phba->ctrl.mcc_tag_available) {
tag = phba->ctrl.mcc_tag[phba->ctrl.mcc_alloc_index];
phba->ctrl.mcc_tag[phba->ctrl.mcc_alloc_index] = 0;
@ -134,6 +135,7 @@ unsigned int alloc_mcc_tag(struct beiscsi_hba *phba)
else
phba->ctrl.mcc_alloc_index++;
}
spin_unlock(&phba->ctrl.mcc_lock);
return tag;
}
@ -254,7 +256,7 @@ int beiscsi_mccq_compl(struct beiscsi_hba *phba,
void free_mcc_tag(struct be_ctrl_info *ctrl, unsigned int tag)
{
spin_lock(&ctrl->mbox_lock);
spin_lock(&ctrl->mcc_lock);
tag = tag & 0x000000FF;
ctrl->mcc_tag[ctrl->mcc_free_index] = tag;
if (ctrl->mcc_free_index == (MAX_MCC_CMD - 1))
@ -262,7 +264,7 @@ void free_mcc_tag(struct be_ctrl_info *ctrl, unsigned int tag)
else
ctrl->mcc_free_index++;
ctrl->mcc_tag_available++;
spin_unlock(&ctrl->mbox_lock);
spin_unlock(&ctrl->mcc_lock);
}
bool is_link_state_evt(u32 trailer)