One-element arrays are deprecated, and we are replacing them with flexible array members instead. So, replace one-element array with flexible-array member in struct hpt_iop_request_scsi_command and refactor the rest of the code, accordingly. The following pieces of code suggest that the one element of array sg_list in struct hpt_iop_request_scsi_command is not taken into account when calculating the total size for both struct hpt_iop_request_scsi_command and the maximum number of elements sg_list will contain: 1047 req->header.size = cpu_to_le32( 1048 sizeof(struct hpt_iop_request_scsi_command) 1049 - sizeof(struct hpt_iopsg) 1050 + sg_count * sizeof(struct hpt_iopsg)); 1400 req_size = sizeof(struct hpt_iop_request_scsi_command) 1401 + sizeof(struct hpt_iopsg) * (hba->max_sg_descriptors - 1); So it's safe to replace the one-element array with a flexible-array member and update the code above, accordingly: now we don't need to subtract sizeof(struct hpt_iopsg) from sizeof(struct hpt_iop_request_scsi_command) because this is implicitly done by the flex-array transformation. Link: https://github.com/KSPP/linux/issues/79 Link: https://github.com/KSPP/linux/issues/205 Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx> --- drivers/scsi/hptiop.c | 3 +-- drivers/scsi/hptiop.h | 2 +- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/hptiop.c b/drivers/scsi/hptiop.c index f18b770626e6..cfc6546e35a6 100644 --- a/drivers/scsi/hptiop.c +++ b/drivers/scsi/hptiop.c @@ -1046,7 +1046,6 @@ static int hptiop_queuecommand_lck(struct scsi_cmnd *scp) req->lun = scp->device->lun; req->header.size = cpu_to_le32( sizeof(struct hpt_iop_request_scsi_command) - - sizeof(struct hpt_iopsg) + sg_count * sizeof(struct hpt_iopsg)); memcpy(req->cdb, scp->cmnd, sizeof(req->cdb)); @@ -1398,7 +1397,7 @@ static int hptiop_probe(struct pci_dev *pcidev, const struct pci_device_id *id) host->max_cmd_len = 16; req_size = sizeof(struct hpt_iop_request_scsi_command) - + sizeof(struct hpt_iopsg) * (hba->max_sg_descriptors - 1); + + sizeof(struct hpt_iopsg) * hba->max_sg_descriptors; if ((req_size & 0x1f) != 0) req_size = (req_size + 0x1f) & ~0x1f; diff --git a/drivers/scsi/hptiop.h b/drivers/scsi/hptiop.h index 363d5a16243f..ef2f2aca598c 100644 --- a/drivers/scsi/hptiop.h +++ b/drivers/scsi/hptiop.h @@ -228,7 +228,7 @@ struct hpt_iop_request_scsi_command { u8 pad1; u8 cdb[16]; __le32 dataxfer_length; - struct hpt_iopsg sg_list[1]; + struct hpt_iopsg sg_list[]; }; struct hpt_iop_request_ioctl_command { -- 2.34.1
