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[SCSI] ibmvscsi: fix DMA API misuse 

ibmvscsi uses dma_unmap_single() for buffers mapped via
dma_map_sg(). It works however it's the API violation. The DMA debug
facility complains about it:

http://marc.info/?l=linux-scsi&m=127018555013151&w=2

Reported-by: Sachin Sant <sachinp@in.ibm.com>
Tested-by: Sachin Sant <sachinp@in.ibm.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
FUJITA Tomonori 2010-04-02 15:50:24 +09:00 committed by James Bottomley
parent a8f23b0353
commit a71fa1fc43
1 changed files with 2 additions and 27 deletions
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29
drivers/scsi/ibmvscsi/ibmvscsi.c
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@ -323,16 +323,6 @@ static void set_srp_direction(struct scsi_cmnd *cmd,
srp_cmd->buf_fmt = fmt;
}
static void unmap_sg_list(int num_entries,
struct device *dev,
struct srp_direct_buf *md)
{
int i;
for (i = 0; i < num_entries; ++i)
dma_unmap_single(dev, md[i].va, md[i].len, DMA_BIDIRECTIONAL);
}
/**
* unmap_cmd_data: - Unmap data pointed in srp_cmd based on the format
* @cmd: srp_cmd whose additional_data member will be unmapped
@ -350,24 +340,9 @@ static void unmap_cmd_data(struct srp_cmd *cmd,
if (out_fmt == SRP_NO_DATA_DESC && in_fmt == SRP_NO_DATA_DESC)
return;
else if (out_fmt == SRP_DATA_DESC_DIRECT ||
in_fmt == SRP_DATA_DESC_DIRECT) {
struct srp_direct_buf *data =
(struct srp_direct_buf *) cmd->add_data;
dma_unmap_single(dev, data->va, data->len, DMA_BIDIRECTIONAL);
} else {
struct srp_indirect_buf *indirect =
(struct srp_indirect_buf *) cmd->add_data;
int num_mapped = indirect->table_desc.len /
sizeof(struct srp_direct_buf);
if (num_mapped <= MAX_INDIRECT_BUFS) {
unmap_sg_list(num_mapped, dev, &indirect->desc_list[0]);
return;
}
unmap_sg_list(num_mapped, dev, evt_struct->ext_list);
}
if (evt_struct->cmnd)
scsi_dma_unmap(evt_struct->cmnd);
}
static int map_sg_list(struct scsi_cmnd *cmd, int nseg,