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| author | James Bottomley <James.Bottomley@steeleye.com> | 2007-07-16 20:41:04 +0200 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.localdomain> | 2007-07-18 18:16:14 +0200 |
| commit | 0f05df8b3b41bc258bdf520b72e8cf7c524048b7 (patch) | |
| tree | e6fd95f097da4785a1e0fb195044a745de8e89aa /drivers | |
| parent | [SCSI] sas_ata: Implement sas_task_abort for ATA devices (diff) | |
| download | linux-0f05df8b3b41bc258bdf520b72e8cf7c524048b7.tar.xz linux-0f05df8b3b41bc258bdf520b72e8cf7c524048b7.zip | |
[SCSI] libsas, aic94xx: fix dma mapping cockups with ATA
This one was noticed by Gilbert Wu of Adaptec:
The libata core actually does the DMA mapping for you, so there has to
be an exception in the device drivers that *don't* do dma mapping for
ATA commands. However, since we've already done this, libsas must now
dma map any ATA commands that it wishes to issue ... and yes, this is a
horrible mess.
Additionally, the test in aic94xx for ATA protocols isn't quite right.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/aic94xx/aic94xx_task.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/libsas/sas_discover.c | 14 |
2 files changed, 15 insertions, 3 deletions
diff --git a/drivers/scsi/aic94xx/aic94xx_task.c b/drivers/scsi/aic94xx/aic94xx_task.c index 6c12c0f19f39..d5d8caba3560 100644 --- a/drivers/scsi/aic94xx/aic94xx_task.c +++ b/drivers/scsi/aic94xx/aic94xx_task.c @@ -76,7 +76,7 @@ static inline int asd_map_scatterlist(struct sas_task *task, /* STP tasks come from libata which has already mapped * the SG list */ - if (task->task_proto == SAS_PROTOCOL_STP) + if (sas_protocol_ata(task->task_proto)) num_sg = task->num_scatter; else num_sg = pci_map_sg(asd_ha->pcidev, task->scatter, @@ -125,7 +125,7 @@ static inline int asd_map_scatterlist(struct sas_task *task, return 0; err_unmap: - if (task->task_proto != SAS_PROTOCOL_STP) + if (sas_protocol_ata(task->task_proto)) pci_unmap_sg(asd_ha->pcidev, task->scatter, task->num_scatter, task->data_dir); return res; diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c index a18c0f6d6668..4d768db1b567 100644 --- a/drivers/scsi/libsas/sas_discover.c +++ b/drivers/scsi/libsas/sas_discover.c @@ -110,6 +110,13 @@ static int sas_execute_task(struct sas_task *task, void *buffer, int size, task->total_xfer_len = size; task->data_dir = pci_dma_dir; task->task_done = sas_disc_task_done; + if (pci_dma_dir != PCI_DMA_NONE && + sas_protocol_ata(task->task_proto)) { + task->num_scatter = pci_map_sg(task->dev->port->ha->pcidev, + task->scatter, + task->num_scatter, + task->data_dir); + } for (retries = 0; retries < 5; retries++) { task->task_state_flags = SAS_TASK_STATE_PENDING; @@ -192,8 +199,13 @@ static int sas_execute_task(struct sas_task *task, void *buffer, int size, } } ex_err: - if (pci_dma_dir != PCI_DMA_NONE) + if (pci_dma_dir != PCI_DMA_NONE) { + if (sas_protocol_ata(task->task_proto)) + pci_unmap_sg(task->dev->port->ha->pcidev, + task->scatter, task->num_scatter, + task->data_dir); kfree(scatter); + } out: return res; } |