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| author | Tejun Heo <htejun@gmail.com> | 2007-02-02 16:22:30 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-02-21 04:58:16 -0500 |
| commit | 458337dbb120d33f326e2b19d54eca8cf179b5c0 (patch) | |
| tree | 91bc5284430b5a8856ec1b2fd4c277c4eb3f8827 /drivers/ata/libata-eh.c | |
| parent | a619f981b477035027dd27dfbee6148b4cd4a83c (diff) | |
| download | linux-stable-458337dbb120d33f326e2b19d54eca8cf179b5c0.tar.gz linux-stable-458337dbb120d33f326e2b19d54eca8cf179b5c0.tar.bz2 linux-stable-458337dbb120d33f326e2b19d54eca8cf179b5c0.zip | |
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.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 52c85af7fe99..7b61562cdd40 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; } |