From 15b7a68c1d030b2365c823730d0eb9257f2aa60e Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Wed, 17 Apr 2019 14:44:38 -0700 Subject: scsi: qla2xxx: Introduce the dsd32 and dsd64 data structures Introduce two structures for the (DMA address, length) combination instead of using separate structure members for the DMA address and length. This patch fixes several Coverity complaints about 'cur_dsd' being used to write outside the bounds of structure members. Cc: Himanshu Madhani Cc: Giridhar Malavali Signed-off-by: Bart Van Assche Acked-by: Himanshu Madhani Signed-off-by: Martin K. Petersen --- drivers/scsi/qla2xxx/qla_dsd.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 drivers/scsi/qla2xxx/qla_dsd.h (limited to 'drivers/scsi/qla2xxx/qla_dsd.h') diff --git a/drivers/scsi/qla2xxx/qla_dsd.h b/drivers/scsi/qla2xxx/qla_dsd.h new file mode 100644 index 000000000000..7479924ba422 --- /dev/null +++ b/drivers/scsi/qla2xxx/qla_dsd.h @@ -0,0 +1,30 @@ +#ifndef _QLA_DSD_H_ +#define _QLA_DSD_H_ + +/* 32-bit data segment descriptor (8 bytes) */ +struct dsd32 { + __le32 address; + __le32 length; +}; + +static inline void append_dsd32(struct dsd32 **dsd, struct scatterlist *sg) +{ + put_unaligned_le32(sg_dma_address(sg), &(*dsd)->address); + put_unaligned_le32(sg_dma_len(sg), &(*dsd)->length); + (*dsd)++; +} + +/* 64-bit data segment descriptor (12 bytes) */ +struct dsd64 { + __le64 address; + __le32 length; +} __packed; + +static inline void append_dsd64(struct dsd64 **dsd, struct scatterlist *sg) +{ + put_unaligned_le64(sg_dma_address(sg), &(*dsd)->address); + put_unaligned_le32(sg_dma_len(sg), &(*dsd)->length); + (*dsd)++; +} + +#endif -- cgit v1.2.3