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scsi: be2iscsi: Fix bad WRB index error

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In very rare scenario, connection gets killed after throwing this error:
scsi host0: BM_2312 : Event CXN_KILLED_BAD_WRB_INDEX_ERROR[15]... CID : 4
connection1:0: detected conn error (1011)

memset ISCSI_WRB descriptor to zero for all allocations of WRB handle.

Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Jitendra Bhivare 2016-08-19 15:20:22 +05:30 committed by Martin K. Petersen
parent 938f372c7d
commit e1f9d31eb3
1 changed files with 7 additions and 13 deletions
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20
drivers/scsi/be2iscsi/be_main.c
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@ -967,6 +967,7 @@ beiscsi_get_wrb_handle(struct hwi_wrb_context *pwrb_context,
else
pwrb_context->alloc_index++;
spin_unlock_bh(&pwrb_context->wrb_lock);
memset(pwrb_handle->pwrb, 0, sizeof(*pwrb_handle->pwrb));
return pwrb_handle;
}
@ -1209,11 +1210,10 @@ hwi_complete_drvr_msgs(struct beiscsi_conn *beiscsi_conn,
struct beiscsi_hba *phba, struct sol_cqe *psol)
{
struct hwi_wrb_context *pwrb_context;
struct wrb_handle *pwrb_handle = NULL;
struct hwi_controller *phwi_ctrlr;
struct iscsi_task *task;
struct beiscsi_io_task *io_task;
uint16_t wrb_index, cid, cri_index;
struct hwi_controller *phwi_ctrlr;
struct wrb_handle *pwrb_handle;
struct iscsi_task *task;
phwi_ctrlr = phba->phwi_ctrlr;
if (is_chip_be2_be3r(phba)) {
@ -1232,9 +1232,6 @@ hwi_complete_drvr_msgs(struct beiscsi_conn *beiscsi_conn,
pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
pwrb_handle = pwrb_context->pwrb_handle_basestd[wrb_index];
task = pwrb_handle->pio_handle;
io_task = task->dd_data;
memset(io_task->pwrb_handle->pwrb, 0, sizeof(struct iscsi_wrb));
iscsi_put_task(task);
}
@ -4295,16 +4292,12 @@ beiscsi_free_mgmt_task_handles(struct beiscsi_conn *beiscsi_conn,
io_task = task->dd_data;
if (io_task->pwrb_handle) {
memset(io_task->pwrb_handle->pwrb, 0,
sizeof(struct iscsi_wrb));
free_wrb_handle(phba, pwrb_context,
io_task->pwrb_handle);
free_wrb_handle(phba, pwrb_context, io_task->pwrb_handle);
io_task->pwrb_handle = NULL;
}
if (io_task->psgl_handle) {
free_mgmt_sgl_handle(phba,
io_task->psgl_handle);
free_mgmt_sgl_handle(phba, io_task->psgl_handle);
io_task->psgl_handle = NULL;
}
@ -4341,6 +4334,7 @@ static void beiscsi_cleanup_task(struct iscsi_task *task)
pci_pool_free(beiscsi_sess->bhs_pool, io_task->cmd_bhs,
io_task->bhs_pa.u.a64.address);
io_task->cmd_bhs = NULL;
task->hdr = NULL;
}
if (task->sc) {