diff options
| author | James Bottomley <James.Bottomley@steeleye.com> | 2006-09-24 04:01:16 +0000 |
|---|---|---|
| committer | Chris Wright <chrisw@sous-sol.org> | 2006-11-03 17:33:47 -0800 |
| commit | 016c9ac429dff26bc481b53f01f0a9ac486021ff (patch) | |
| tree | 2cdfe54eca5e1e89b1449dfe70522b1b81dbff89 | |
| parent | 02bb8f3f912d8a2048ed7502a733f64c6bf8fcfe (diff) | |
| download | lwn-016c9ac429dff26bc481b53f01f0a9ac486021ff.tar.gz lwn-016c9ac429dff26bc481b53f01f0a9ac486021ff.zip | |
[PATCH] SCSI: aic7xxx: avoid checking SBLKCTL register for certain cards
[SCSI] aic7xxx: avoid checking SBLKCTL register for certain cards
For cards that don't support LVD, checking the SBLKCTL register to
determine the bus singalling doesn't work. So, check that the card
supports LVD first (AHC_ULTRA2) before checking the register.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
| -rw-r--r-- | drivers/scsi/aic7xxx/aic7xxx_osm.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c index aa4be8a31415..34c9ca5e6d05 100644 --- a/drivers/scsi/aic7xxx/aic7xxx_osm.c +++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c @@ -2539,15 +2539,23 @@ static void ahc_linux_set_iu(struct scsi_target *starget, int iu) static void ahc_linux_get_signalling(struct Scsi_Host *shost) { struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; - u8 mode = ahc_inb(ahc, SBLKCTL); + u8 mode; - if (mode & ENAB40) - spi_signalling(shost) = SPI_SIGNAL_LVD; - else if (mode & ENAB20) + if (!(ahc->features & AHC_ULTRA2)) { + /* non-LVD chipset, may not have SBLKCTL reg */ spi_signalling(shost) = ahc->features & AHC_HVD ? SPI_SIGNAL_HVD : SPI_SIGNAL_SE; + return; + } + + mode = ahc_inb(ahc, SBLKCTL); + + if (mode & ENAB40) + spi_signalling(shost) = SPI_SIGNAL_LVD; + else if (mode & ENAB20) + spi_signalling(shost) = SPI_SIGNAL_SE; else spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; } |