diff options
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
-rw-r--r-- | drivers/scsi/scsi_lib.c | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 70454b4e8485..1f5a07bf2a75 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c | |||
@@ -2290,41 +2290,3 @@ void scsi_kunmap_atomic_sg(void *virt) | |||
2290 | kunmap_atomic(virt, KM_BIO_SRC_IRQ); | 2290 | kunmap_atomic(virt, KM_BIO_SRC_IRQ); |
2291 | } | 2291 | } |
2292 | EXPORT_SYMBOL(scsi_kunmap_atomic_sg); | 2292 | EXPORT_SYMBOL(scsi_kunmap_atomic_sg); |
2293 | |||
2294 | /** | ||
2295 | * scsi_dma_map - perform DMA mapping against command's sg lists | ||
2296 | * @cmd: scsi command | ||
2297 | * | ||
2298 | * Returns the number of sg lists actually used, zero if the sg lists | ||
2299 | * is NULL, or -ENOMEM if the mapping failed. | ||
2300 | */ | ||
2301 | int scsi_dma_map(struct scsi_cmnd *cmd) | ||
2302 | { | ||
2303 | int nseg = 0; | ||
2304 | |||
2305 | if (scsi_sg_count(cmd)) { | ||
2306 | struct device *dev = cmd->device->host->shost_gendev.parent; | ||
2307 | |||
2308 | nseg = dma_map_sg(dev, scsi_sglist(cmd), scsi_sg_count(cmd), | ||
2309 | cmd->sc_data_direction); | ||
2310 | if (unlikely(!nseg)) | ||
2311 | return -ENOMEM; | ||
2312 | } | ||
2313 | return nseg; | ||
2314 | } | ||
2315 | EXPORT_SYMBOL(scsi_dma_map); | ||
2316 | |||
2317 | /** | ||
2318 | * scsi_dma_unmap - unmap command's sg lists mapped by scsi_dma_map | ||
2319 | * @cmd: scsi command | ||
2320 | */ | ||
2321 | void scsi_dma_unmap(struct scsi_cmnd *cmd) | ||
2322 | { | ||
2323 | if (scsi_sg_count(cmd)) { | ||
2324 | struct device *dev = cmd->device->host->shost_gendev.parent; | ||
2325 | |||
2326 | dma_unmap_sg(dev, scsi_sglist(cmd), scsi_sg_count(cmd), | ||
2327 | cmd->sc_data_direction); | ||
2328 | } | ||
2329 | } | ||
2330 | EXPORT_SYMBOL(scsi_dma_unmap); | ||