[SCSI] aic79xx: SLOWCRC fix

This patch introduces the SLOWCRC handling for certain buggy chipsets.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/scsi/aic7xxx/aic79xx_pci.c b/drivers/scsi/aic7xxx/aic79xx_pci.c
index 196a6344b037..757242e522c2 100644
--- a/drivers/scsi/aic7xxx/aic79xx_pci.c
+++ b/drivers/scsi/aic7xxx/aic79xx_pci.c
@@ -38,7 +38,7 @@
  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGES.
  *
- * $Id: //depot/aic7xxx/aic7xxx/aic79xx_pci.c#89 $
+ * $Id: //depot/aic7xxx/aic7xxx/aic79xx_pci.c#92 $
  */
 
 #ifdef __linux__
@@ -950,12 +950,19 @@ ahd_aic790X_setup(struct ahd_softc *ahd)
                 if ((ahd->flags & AHD_HP_BOARD) == 0)
                         AHD_SET_SLEWRATE(ahd, AHD_SLEWRATE_DEF_REVA);
         } else {
+                /* This is revision B and newer. */
+                extern uint32_t aic79xx_slowcrc;
                 u_int devconfig1;
 
                 ahd->features |= AHD_RTI|AHD_NEW_IOCELL_OPTS
-                              |  AHD_NEW_DFCNTRL_OPTS|AHD_FAST_CDB_DELIVERY;
+                              |  AHD_NEW_DFCNTRL_OPTS|AHD_FAST_CDB_DELIVERY
+                              |  AHD_BUSFREEREV_BUG;
                 ahd->bugs |= AHD_LQOOVERRUN_BUG|AHD_EARLY_REQ_BUG;
 
+                /* If the user requested the the SLOWCRC bit to be set. */
+                if (aic79xx_slowcrc)
+                        ahd->features |= AHD_AIC79XXB_SLOWCRC;
+
                 /*
                  * Some issues have been resolved in the 7901B.
                  */