Add a helper for setting up the special_bvec instead of open coding it in three place, and use the new bvec_set_page helper to initialize special_vec.
Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Chaitanya Kulkarni <[email protected]> --- drivers/scsi/sd.c | 36 +++++++++++++++++------------------- 1 file changed, 17 insertions(+), 19 deletions(-) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 47dafe6b8a66d1..277960decc104b 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -831,6 +831,19 @@ static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9)); } +static void *sd_set_special_bvec(struct request *rq, unsigned int data_len) +{ + struct page *page; + + page = mempool_alloc(sd_page_pool, GFP_ATOMIC); + if (!page) + return NULL; + clear_highpage(page); + bvec_set_page(&rq->special_vec, page, data_len, 0); + rq->rq_flags |= RQF_SPECIAL_PAYLOAD; + return bvec_virt(&rq->special_vec); +} + static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) { struct scsi_device *sdp = cmd->device; @@ -841,19 +854,14 @@ static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) unsigned int data_len = 24; char *buf; - rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); - if (!rq->special_vec.bv_page) + buf = sd_set_special_bvec(rq, data_len); + if (!buf) return BLK_STS_RESOURCE; - clear_highpage(rq->special_vec.bv_page); - rq->special_vec.bv_offset = 0; - rq->special_vec.bv_len = data_len; - rq->rq_flags |= RQF_SPECIAL_PAYLOAD; cmd->cmd_len = 10; cmd->cmnd[0] = UNMAP; cmd->cmnd[8] = 24; - buf = bvec_virt(&rq->special_vec); put_unaligned_be16(6 + 16, &buf[0]); put_unaligned_be16(16, &buf[2]); put_unaligned_be64(lba, &buf[8]); @@ -876,13 +884,8 @@ static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); u32 data_len = sdp->sector_size; - rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); - if (!rq->special_vec.bv_page) + if (!sd_set_special_bvec(rq, data_len)) return BLK_STS_RESOURCE; - clear_highpage(rq->special_vec.bv_page); - rq->special_vec.bv_offset = 0; - rq->special_vec.bv_len = data_len; - rq->rq_flags |= RQF_SPECIAL_PAYLOAD; cmd->cmd_len = 16; cmd->cmnd[0] = WRITE_SAME_16; @@ -908,13 +911,8 @@ static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); u32 data_len = sdp->sector_size; - rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); - if (!rq->special_vec.bv_page) + if (!sd_set_special_bvec(rq, data_len)) return BLK_STS_RESOURCE; - clear_highpage(rq->special_vec.bv_page); - rq->special_vec.bv_offset = 0; - rq->special_vec.bv_len = data_len; - rq->rq_flags |= RQF_SPECIAL_PAYLOAD; cmd->cmd_len = 10; cmd->cmnd[0] = WRITE_SAME; -- 2.39.0 _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
