scsi: qla2xxx: Replace one-element array with DECLARE_FLEX_ARRAY() helper

One-element arrays as fake flex arrays are deprecated and we are moving
towards adopting C99 flexible-array members, instead. So, replace
one-element array declaration in struct ct_sns_gpnft_rsp, which is
ultimately being used inside a union:

drivers/scsi/qla2xxx/qla_def.h:
3240 struct ct_sns_gpnft_pkt {
3241         union {
3242                 struct ct_sns_req req;
3243                 struct ct_sns_gpnft_rsp rsp;
3244         } p;
3245 };

Refactor the rest of the code, accordingly.

This issue was found with the help of Coccinelle.

Link: https://github.com/KSPP/linux/issues/245
Link: https://github.com/KSPP/linux/issues/193
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/ZH+/rZ1R1cBjIxjS@work
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index dfee3b4..c262cfc 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -3174,12 +3174,12 @@ struct ct_sns_gpnft_rsp {
                uint8_t vendor_unique;
        };
        /* Assume the largest number of targets for the union */
-       struct ct_sns_gpn_ft_data {
+       DECLARE_FLEX_ARRAY(struct ct_sns_gpn_ft_data {
                u8 control_byte;
                u8 port_id[3];
                u32 reserved;
                u8 port_name[8];
-       } entries[1];
+       }, entries);
 };
 
 /* CT command response */

diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index 4738f89..1cf9d20 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -3776,8 +3776,8 @@ int qla24xx_async_gpnft(scsi_qla_host_t *vha, u8 fc4_type, srb_t *sp)
                sp->u.iocb_cmd.u.ctarg.req_size = GPN_FT_REQ_SIZE;
 
                rspsz = sizeof(struct ct_sns_gpnft_rsp) +
-                       ((vha->hw->max_fibre_devices - 1) *
-                           sizeof(struct ct_sns_gpn_ft_data));
+                       vha->hw->max_fibre_devices *
+                           sizeof(struct ct_sns_gpn_ft_data);
 
                sp->u.iocb_cmd.u.ctarg.rsp = dma_alloc_coherent(&vha->hw->pdev->dev,
                                                                rspsz,