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authorTejun Heo <htejun@gmail.com>2007-02-02 16:22:30 +0900
committerJeff Garzik <jeff@garzik.org>2007-02-21 04:58:16 -0500
commit458337dbb120d33f326e2b19d54eca8cf179b5c0 (patch)
tree91bc5284430b5a8856ec1b2fd4c277c4eb3f8827 /drivers/ata/libata-eh.c
parenta619f981b477035027dd27dfbee6148b4cd4a83c (diff)
libata: improve ata_down_xfermask_limit()
Make ata_down_xfermask_limit() accept @sel instead of @force_pio0. @sel selects how the xfermask limit will be adjusted. The following selectors are defined. * ATA_DNXFER_PIO : only speed down PIO * ATA_DNXFER_DMA : only speed down DMA, don't cause transfer mode change * ATA_DNXFER_40C : apply 40c cable limit * ATA_DNXFER_FORCE_PIO : force PIO * ATA_DNXFER_FORCE_PIO0 : force PIO0 (same as original with @force_pio0 == 1) * ATA_DNXFER_ANY : same as original with @force_pio0 == 0 Currently, only ANY and FORCE_PIO0 are used to maintain the original behavior. Other selectors will be used later to improve EH speed down sequence. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/libata-eh.c')
-rw-r--r--drivers/ata/libata-eh.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 52c85af7fe9..7b61562cdd4 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1276,7 +1276,7 @@ static int ata_eh_speed_down(struct ata_device *dev, int is_io,
return ATA_EH_HARDRESET;
/* lower transfer mode */
- if (ata_down_xfermask_limit(dev, 0) == 0)
+ if (ata_down_xfermask_limit(dev, ATA_DNXFER_ANY) == 0)
return ATA_EH_SOFTRESET;
ata_dev_printk(dev, KERN_ERR,
@@ -1965,6 +1965,7 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
struct ata_eh_context *ehc = &ap->eh_context;
struct ata_device *dev;
int down_xfermask, i, rc;
+ int dnxfer_sel;
DPRINTK("ENTER\n");
@@ -2064,8 +2065,10 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
sata_down_spd_limit(ap);
default:
ehc->tries[dev->devno]--;
- if (down_xfermask &&
- ata_down_xfermask_limit(dev, ehc->tries[dev->devno] == 1))
+ dnxfer_sel = ATA_DNXFER_ANY;
+ if (ehc->tries[dev->devno] == 1)
+ dnxfer_sel = ATA_DNXFER_FORCE_PIO0;
+ if (down_xfermask && ata_down_xfermask_limit(dev, dnxfer_sel))
ehc->tries[dev->devno] = 0;
}