Per Dan Carpenter:
The patch d79c9e9d4b3d: "scsi: lpfc: Support dynamic unbounded SGL
lists on G7 hardware." from Aug 14, 2019, leads to the following
static checker warning:
drivers/scsi/lpfc/lpfc_init.c:4107 lpfc_new_io_buf()
error: not allocating enough data 784 vs 768
There was no need to compare sizes nor to allocate size based on a
define.
Change allocation to use actual structure length
Signed-off-by: Dick Kennedy <dick.kennedy@xxxxxxxxxxxx>
Signed-off-by: James Smart <jsmart2021@xxxxxxxxx>
CC: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
drivers/scsi/lpfc/lpfc_init.c | 11 +----------
drivers/scsi/lpfc/lpfc_sli4.h | 3 ---
2 files changed, 1 insertion(+), 13 deletions(-)
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 9600d1ecc518..9e83ed8ec6a6 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -4087,18 +4087,9 @@ lpfc_new_io_buf(struct lpfc_hba *phba, int num_to_alloc)
LIST_HEAD(post_nblist);
LIST_HEAD(nvme_nblist);
- /* Sanity check to ensure our sizing is right for both SCSI and NVME */
- if (sizeof(struct lpfc_io_buf) > LPFC_COMMON_IO_BUF_SZ) {
- lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
- "6426 Common buffer size %zd exceeds %d\n",
- sizeof(struct lpfc_io_buf),
- LPFC_COMMON_IO_BUF_SZ);
- return 0;
- }
-
phba->sli4_hba.io_xri_cnt = 0;
for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
- lpfc_ncmd = kzalloc(LPFC_COMMON_IO_BUF_SZ, GFP_KERNEL);
+ lpfc_ncmd = kzalloc(sizeof(*lpfc_ncmd), GFP_KERNEL);
if (!lpfc_ncmd)
break;
/*
diff --git a/drivers/scsi/lpfc/lpfc_sli4.h b/drivers/scsi/lpfc/lpfc_sli4.h
index a4be83d1f37e..0d4882a9e634 100644
--- a/drivers/scsi/lpfc/lpfc_sli4.h
+++ b/drivers/scsi/lpfc/lpfc_sli4.h
@@ -49,9 +49,6 @@
#define LPFC_FCP_MQ_THRESHOLD_MAX 256
#define LPFC_FCP_MQ_THRESHOLD_DEF 8
-/* Common buffer size to accomidate SCSI and NVME IO buffers */
-#define LPFC_COMMON_IO_BUF_SZ 768
-
/*
* Provide the default FCF Record attributes used by the driver
* when nonFIP mode is configured and there is no other default
--
2.13.7
