| Submitter | FUJITA Tomonori |
|---|---|
| Date | April 2, 2010, 6:12 a.m. |
| Message ID | <20100402151229V.fujita.tomonori@lab.ntt.co.jp> |
| Download | mbox | patch |
| Permalink | /patch/49278/ |
| State | Superseded |
| Headers | show |
Comments
FUJITA Tomonori wrote: > On Fri, 02 Apr 2010 10:48:55 +0530 > Sachin Sant <sachinp@in.ibm.com> wrote: > > >> 2.6.34-rc3 boot on a power5 box produces this badness message >> during ibmvscsi initialization. >> >> ibmvscsi 30000003: Client reserve enabled >> ibmvscsi 30000003: sent SRP login >> ibmvscsi 30000003: SRP_LOGIN succeeded >> ibmvscsi 30000003: DMA-API: device driver frees DMA memory with wrong function [device address=0x0000000000011520] [size=36 bytes] [mapped as scather-gather] [unmapped as single] >> > > ibmvscsi has been incompatible with the dma debug facility, I > guess. The driver uses dma_unmap_single for buffers mapped via > dma_map_sg. It works but it's the API violation. > > Does this patch work? > Yes, this patch fixed the issue for me. Thanks -Regards -Sachin > diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c > index dc1bcbe..0856436 100644 > --- a/drivers/scsi/ibmvscsi/ibmvscsi.c > +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c > @@ -322,16 +322,6 @@ 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 > @@ -349,24 +339,9 @@ 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, > >
Patch
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c index dc1bcbe..0856436 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.c +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c @@ -322,16 +322,6 @@ 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 @@ -349,24 +339,9 @@ 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,