According to Documentation/DMA-API.txt, all the parameters of dma_unmap_sg() must be the same as those and passed in to the scatter/gather mapping API. But in scsi drivers such as ibmscsi_tgt/iscsi/mvsas/pm8001, the <nents> parameter of dma_unmap_sg() is number of elements after mapping. So fix them. Part of the document is as follows: void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction direction) Unmap the previously mapped scatter/gather list. All the parameters must be the same as those and passed in to the scatter/gather mapping API. Note: <nents> must be the number you passed in, *not* the number of DMA address entries returned. Chang Log: v1 -> v2: Split the patch into small patchset, and one patch per driver; chenxiang (4): scsi: ibmvscsis: fix dma_unmap_sg() parameter scsi: isci: fix dma_unmap_sg() parameter scsi: mvsas: fix dma_unmap_sg() parameter scsi: pm8001: fix dma_unmap_sg() parameter drivers/scsi/ibmvscsi_tgt/libsrp.c | 6 ++++-- drivers/scsi/isci/request.c | 2 +- drivers/scsi/mvsas/mv_sas.c | 4 ++-- drivers/scsi/pm8001/pm8001_sas.c | 2 +- 4 files changed, 8 insertions(+), 6 deletions(-) -- 1.9.1
