Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=374abf2cb16a9df8be96675c606996458872e8b3
Commit: 374abf2cb16a9df8be96675c606996458872e8b3
Parent: 9f7897554eeca34ec23dd877cc27402bd327a1ce
Author: Bartlomiej Zolnierkiewicz <[EMAIL PROTECTED]>
AuthorDate: Mon Jun 11 11:40:07 2007 +0200
Committer: Jeff Garzik <[EMAIL PROTECTED]>
CommitDate: Wed Jun 20 19:56:21 2007 -0400
pata_it821x: (partially) fix DMA in RAID mode
Code intended to check DMA status was checking DMA command register.
Moreover firmware seems to "forget" to set DMA capable bit for the
slave device (at least in RAID mode but without ITE RAID volumes) so
check device ID for DMA capable bit when deciding whether to use DMA
and remove DMA status check completely.
Thanks to Pavol Simo for the bugreport and testing the initial fix.
This change unfortunately still doesn't fix DMA in RAID mode (which
works fine with IDE it821x) but Alan is working on the missing pieces
(pata_it821x vs libata EH issues).
Signed-off-by: Bartlomiej Zolnierkiewicz <[EMAIL PROTECTED]>
Acked-by: Alan Cox <[EMAIL PROTECTED]>
Cc: Tejun Heo <[EMAIL PROTECTED]>
Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
---
drivers/ata/pata_it821x.c | 11 +++--------
1 files changed, 3 insertions(+), 8 deletions(-)
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index b3456d7..525c9c1 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -2,6 +2,7 @@
* pata_it821x.c - IT821x PATA for new ATA layer
* (C) 2005 Red Hat Inc
* Alan Cox <[EMAIL PROTECTED]>
+ * (C) 2007 Bartlomiej Zolnierkiewicz
*
* based upon
*
@@ -79,7 +80,7 @@
#define DRV_NAME "pata_it821x"
-#define DRV_VERSION "0.3.6"
+#define DRV_VERSION "0.3.7"
struct it821x_dev
{
@@ -460,14 +461,8 @@ static unsigned int it821x_passthru_qc_issue_prot(struct
ata_queued_cmd *qc)
static int it821x_smart_set_mode(struct ata_port *ap, struct ata_device
**unused)
{
- int dma_enabled = 0;
int i;
- /* Bits 5 and 6 indicate if DMA is active on master/slave */
- /* It is possible that BMDMA isn't allocated */
- if (ap->ioaddr.bmdma_addr)
- dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
-
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *dev = &ap->device[i];
if (ata_dev_enabled(dev)) {
@@ -476,7 +471,7 @@ static int it821x_smart_set_mode(struct ata_port *ap,
struct ata_device **unused
dev->dma_mode = XFER_MW_DMA_0;
/* We do need the right mode information for DMA or PIO
and this comes from the current configuration flags
*/
- if (dma_enabled & (1 << (5 + i))) {
+ if (ata_id_has_dma(dev->id)) {
ata_dev_printk(dev, KERN_INFO, "configured for
DMA\n");
dev->xfer_mode = XFER_MW_DMA_0;
dev->xfer_shift = ATA_SHIFT_MWDMA;
-
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