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| author | Doug Ledford <dledford@redhat.com> | 2006-09-17 07:38:15 +0200 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-09-23 17:48:11 -0500 |
| commit | cf2b5d3fcab77a9390293920ec5b49e67eced200 (patch) | |
| tree | 63f85032f1a5a3423997880d3c9033f1928e90e1 | |
| parent | 3e3c60e3a8c7013d55768aa7256bb5a7f66b0bb4 (diff) | |
| download | linux-stable-cf2b5d3fcab77a9390293920ec5b49e67eced200.tar.gz linux-stable-cf2b5d3fcab77a9390293920ec5b49e67eced200.tar.bz2 linux-stable-cf2b5d3fcab77a9390293920ec5b49e67eced200.zip | |
[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>
| -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 0b3c01ac4259..64c8b88a429f 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; |