diff options
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 12 | ||||
| -rw-r--r-- | include/linux/scatterlist.h | 3 | ||||
| -rw-r--r-- | lib/scatterlist.c | 6 |
3 files changed, 10 insertions, 11 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 1f8e2dc9c616..30268bb2ddb6 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -2363,17 +2363,13 @@ do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num, bool do_write) u64 block, rest = 0; struct scsi_data_buffer *sdb; enum dma_data_direction dir; - size_t (*func)(struct scatterlist *, unsigned int, void *, size_t, - off_t); if (do_write) { sdb = scsi_out(scmd); dir = DMA_TO_DEVICE; - func = sg_pcopy_to_buffer; } else { sdb = scsi_in(scmd); dir = DMA_FROM_DEVICE; - func = sg_pcopy_from_buffer; } if (!sdb->length) @@ -2385,16 +2381,16 @@ do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num, bool do_write) if (block + num > sdebug_store_sectors) rest = block + num - sdebug_store_sectors; - ret = func(sdb->table.sgl, sdb->table.nents, + ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents, fake_storep + (block * scsi_debug_sector_size), - (num - rest) * scsi_debug_sector_size, 0); + (num - rest) * scsi_debug_sector_size, 0, do_write); if (ret != (num - rest) * scsi_debug_sector_size) return ret; if (rest) { - ret += func(sdb->table.sgl, sdb->table.nents, + ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents, fake_storep, rest * scsi_debug_sector_size, - (num - rest) * scsi_debug_sector_size); + (num - rest) * scsi_debug_sector_size, do_write); } return ret; diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h index 505d0481df1e..9b1ef0c820a7 100644 --- a/include/linux/scatterlist.h +++ b/include/linux/scatterlist.h @@ -265,6 +265,9 @@ int sg_alloc_table_from_pages(struct sg_table *sgt, unsigned long offset, unsigned long size, gfp_t gfp_mask); +size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, void *buf, + size_t buflen, off_t skip, bool to_buffer); + size_t sg_copy_from_buffer(struct scatterlist *sgl, unsigned int nents, const void *buf, size_t buflen); size_t sg_copy_to_buffer(struct scatterlist *sgl, unsigned int nents, diff --git a/lib/scatterlist.c b/lib/scatterlist.c index 317b62c6da3c..d105a9f56878 100644 --- a/lib/scatterlist.c +++ b/lib/scatterlist.c @@ -650,9 +650,8 @@ EXPORT_SYMBOL(sg_miter_stop); * Returns the number of copied bytes. * **/ -static size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, - void *buf, size_t buflen, off_t skip, - bool to_buffer) +size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, void *buf, + size_t buflen, off_t skip, bool to_buffer) { unsigned int offset = 0; struct sg_mapping_iter miter; @@ -689,6 +688,7 @@ static size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, local_irq_restore(flags); return offset; } +EXPORT_SYMBOL(sg_copy_buffer); /** * sg_copy_from_buffer - Copy from a linear buffer to an SG list |