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scsi: qla2xxx: fix fcport null pointer access. 

This patch allocates DMA memory to prevent NULL pointer access for ct_sns
request while sending switch commands.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran 2019-01-24 23:23:44 -08:00 committed by Martin K. Petersen
parent 51fd6e6351
commit 9ecd6564d1
1 changed files with 12 additions and 3 deletions
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15
drivers/scsi/qla2xxx/qla_init.c
View File

@ -4755,6 +4755,16 @@ qla2x00_alloc_fcport(scsi_qla_host_t *vha, gfp_t flags)
if (!fcport)
return NULL;
fcport->ct_desc.ct_sns = dma_alloc_coherent(&vha->hw->pdev->dev,
sizeof(struct ct_sns_pkt), &fcport->ct_desc.ct_sns_dma,
flags);
if (!fcport->ct_desc.ct_sns) {
ql_log(ql_log_warn, vha, 0xd049,
"Failed to allocate ct_sns request.\n");
kfree(fcport);
return NULL;
}
/* Setup fcport template structure. */
fcport->vha = vha;
fcport->port_type = FCT_UNKNOWN;
@ -4763,13 +4773,11 @@ qla2x00_alloc_fcport(scsi_qla_host_t *vha, gfp_t flags)
fcport->supported_classes = FC_COS_UNSPECIFIED;
fcport->fp_speed = PORT_SPEED_UNKNOWN;
fcport->ct_desc.ct_sns = dma_alloc_coherent(&vha->hw->pdev->dev,
sizeof(struct ct_sns_pkt), &fcport->ct_desc.ct_sns_dma,
flags);
fcport->disc_state = DSC_DELETED;
fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
fcport->deleted = QLA_SESS_DELETED;
fcport->login_retry = vha->hw->login_retry_count;
fcport->chip_reset = vha->hw->base_qpair->chip_reset;
fcport->logout_on_delete = 1;
if (!fcport->ct_desc.ct_sns) {
@ -4778,6 +4786,7 @@ qla2x00_alloc_fcport(scsi_qla_host_t *vha, gfp_t flags)
kfree(fcport);
fcport = NULL;
}
INIT_WORK(&fcport->del_work, qla24xx_delete_sess_fn);
INIT_WORK(&fcport->reg_work, qla_register_fcport_fn);
INIT_LIST_HEAD(&fcport->gnl_entry);