diff options
| author | Doug Ledford <dledford@redhat.com> | 2006-09-24 04:01:16 +0000 |
|---|---|---|
| committer | Chris Wright <chrisw@sous-sol.org> | 2006-11-03 17:33:48 -0800 |
| commit | 0e1ce4461d940d122302593898632e96b72a7e4c (patch) | |
| tree | fa3ef196887c56afb4f380d541098a7eeca1b8a6 /drivers | |
| parent | 0a898c598ecf239a60775063887317459f9e275b (diff) | |
[PATCH] SCSI: aic7xxx: pause sequencer before touching SBLKCTL
[SCSI] aic7xxx: pause sequencer before touching SBLKCTL
Some cards need to pause the sequencer before the SBLKCTL register is
touched. This fixes a PCI related oops seen on powerpc macs with this
card caused by trying to ascertain the bus signalling before beginning
domain validation.
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/aic7xxx/aic7xxx_osm.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c index 34c9ca5e6d05..129444a7f6f2 100644 --- a/drivers/scsi/aic7xxx/aic7xxx_osm.c +++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c @@ -2539,6 +2539,7 @@ 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; + unsigned long flags; u8 mode; if (!(ahc->features & AHC_ULTRA2)) { @@ -2550,7 +2551,11 @@ static void ahc_linux_get_signalling(struct Scsi_Host *shost) return; } + ahc_lock(ahc, &flags); + ahc_pause(ahc); mode = ahc_inb(ahc, SBLKCTL); + ahc_unpause(ahc); + ahc_unlock(ahc, &flags); if (mode & ENAB40) spi_signalling(shost) = SPI_SIGNAL_LVD; |