1 files changed, 55 insertions, 10 deletions

diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 29de259a981e..5419440087fd 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -100,6 +100,11 @@ enum si_intf_state {
 	/* FIXME - add watchdog stuff. */
 };
 
+/* Some BT-specific defines we need here. */
+#define IPMI_BT_INTMASK_REG		2
+#define IPMI_BT_INTMASK_CLEAR_IRQ_BIT	2
+#define IPMI_BT_INTMASK_ENABLE_IRQ_BIT	1
+
 enum si_type {
     SI_KCS, SI_SMIC, SI_BT
 };
@@ -875,6 +880,17 @@ static irqreturn_t si_irq_handler(int irq, void *data, struct pt_regs *regs)
 	return IRQ_HANDLED;
 }
 
+static irqreturn_t si_bt_irq_handler(int irq, void *data, struct pt_regs *regs)
+{
+	struct smi_info *smi_info = data;
+	/* We need to clear the IRQ flag for the BT interface. */
+	smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
+			     IPMI_BT_INTMASK_CLEAR_IRQ_BIT
+			     | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
+	return si_irq_handler(irq, data, regs);
+}
+
+
 static struct ipmi_smi_handlers handlers =
 {
 	.owner                  = THIS_MODULE,
@@ -1001,11 +1017,22 @@ static int std_irq_setup(struct smi_info *info)
 	if (!info->irq)
 		return 0;
 
-	rv = request_irq(info->irq,
-			 si_irq_handler,
-			 SA_INTERRUPT,
-			 DEVICE_NAME,
-			 info);
+	if (info->si_type == SI_BT) {
+		rv = request_irq(info->irq,
+				 si_bt_irq_handler,
+				 SA_INTERRUPT,
+				 DEVICE_NAME,
+				 info);
+		if (!rv)
+			/* Enable the interrupt in the BT interface. */
+			info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
+					 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
+	} else
+		rv = request_irq(info->irq,
+				 si_irq_handler,
+				 SA_INTERRUPT,
+				 DEVICE_NAME,
+				 info);
 	if (rv) {
 		printk(KERN_WARNING
 		       "ipmi_si: %s unable to claim interrupt %d,"
@@ -1024,6 +1051,9 @@ static void std_irq_cleanup(struct smi_info *info)
 	if (!info->irq)
 		return;
 
+	if (info->si_type == SI_BT)
+		/* Disable the interrupt in the BT interface. */
+		info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
 	free_irq(info->irq, info);
 }
 
@@ -1526,8 +1556,17 @@ static int try_init_acpi(int intf_num, struct smi_info **new_info)
 		info->irq_setup = NULL;
 	}
 
-	regspacings[intf_num] = spmi->addr.register_bit_width / 8;
-	info->io.regspacing = spmi->addr.register_bit_width / 8;
+	if (spmi->addr.register_bit_width) {
+		/* A (hopefully) properly formed register bit width. */
+		regspacings[intf_num] = spmi->addr.register_bit_width / 8;
+		info->io.regspacing = spmi->addr.register_bit_width / 8;
+	} else {
+		/* Some broken systems get this wrong and set the value
+		 * to zero.  Assume it is the default spacing.  If that
+		 * is wrong, too bad, the vendor should fix the tables. */
+		regspacings[intf_num] = DEFAULT_REGSPACING;
+		info->io.regspacing = DEFAULT_REGSPACING;
+	}
 	regsizes[intf_num] = regspacings[intf_num];
 	info->io.regsize = regsizes[intf_num];
 	regshifts[intf_num] = spmi->addr.register_bit_offset;
@@ -1623,7 +1662,13 @@ static int decode_dmi(dmi_header_t *dm, int intf_num)
 		}
 	} else {
 		/* Old DMI spec. */
-		ipmi_data->base_addr = base_addr;
+		/* Note that technically, the lower bit of the base
+		 * address should be 1 if the address is I/O and 0 if
+		 * the address is in memory.  So many systems get that
+		 * wrong (and all that I have seen are I/O) so we just
+		 * ignore that bit and assume I/O.  Systems that use
+		 * memory should use the newer spec, anyway. */
+		ipmi_data->base_addr = base_addr & 0xfffe;
 		ipmi_data->addr_space = IPMI_IO_ADDR_SPACE;
 		ipmi_data->offset = 1;
 	}
@@ -2199,7 +2244,7 @@ static int init_one_smi(int intf_num, struct smi_info **smi)
 	/* Wait until we know that we are out of any interrupt
 	   handlers might have been running before we freed the
 	   interrupt. */
-	synchronize_kernel();
+	synchronize_sched();
 
 	if (new_smi->si_sm) {
 		if (new_smi->handlers)
@@ -2312,7 +2357,7 @@ static void __exit cleanup_one_si(struct smi_info *to_clean)
 	/* Wait until we know that we are out of any interrupt
 	   handlers might have been running before we freed the
 	   interrupt. */
-	synchronize_kernel();
+	synchronize_sched();
 
 	/* Wait for the timer to stop.  This avoids problems with race
 	   conditions removing the timer here. */