From cf2b5d3fcab77a9390293920ec5b49e67eced200 Mon Sep 17 00:00:00 2001 From: Doug Ledford Date: Sun, 17 Sep 2006 07:38:15 +0200 Subject: [PATCH] [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 --- drivers/scsi/aic7xxx/aic7xxx_osm.c | 5 +++++ 1 file changed, 5 insertions(+) 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; -- 2.20.1