ipmi: fix memleaking for add_smi when duplicating happen

Free the temporary info struct when we have duplicated ones.
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Cc: Corey Minyard <minyard@acm.org>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Myron Stowe <myron.stowe@hp.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/char/ipmi/ipmi_si_intf.c

@@ -1804,9 +1804,12 @@ static int hotmod_handler(const char *val, struct kernel_param *kp)
 				info->irq_setup = std_irq_setup;
 			info->slave_addr = ipmb;
 
-			if (!add_smi(info))
+			if (!add_smi(info)) {
 				if (try_smi_init(info))
 					cleanup_one_si(info);
+			} else {
+				kfree(info);
+			}
 		} else {
 			/* remove */
 			struct smi_info *e, *tmp_e;
@@ -1890,9 +1893,12 @@ static __devinit void hardcode_find_bmc(void)
 			info->irq_setup = std_irq_setup;
 		info->slave_addr = slave_addrs[i];
 
-		if (!add_smi(info))
+		if (!add_smi(info)) {
 			if (try_smi_init(info))
 				cleanup_one_si(info);
+		} else {
+			kfree(info);
+		}
 	}
 }
 
@@ -2082,7 +2088,8 @@ static __devinit int try_init_spmi(struct SPMITable *spmi)
 	}
 	info->io.addr_data = spmi->addr.address;
 
-	add_smi(info);
+	if (add_smi(info))
+		kfree(info);
 
 	return 0;
 }
@@ -2198,7 +2205,10 @@ static int __devinit ipmi_pnp_probe(struct pnp_dev *dev,
 		 res, info->io.regsize, info->io.regspacing,
 		 info->irq);
 
-	return add_smi(info);
+	if (add_smi(info))
+		goto err_free;
+
+	return 0;
 
 err_free:
 	kfree(info);
@@ -2356,7 +2366,8 @@ static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
 	if (info->irq)
 		info->irq_setup = std_irq_setup;
 
-	add_smi(info);
+	if (add_smi(info))
+		kfree(info);
 }
 
 static void __devinit dmi_find_bmc(void)
@@ -2462,7 +2473,10 @@ static int __devinit ipmi_pci_probe(struct pci_dev *pdev,
 		&pdev->resource[0], info->io.regsize, info->io.regspacing,
 		info->irq);
 
-	return add_smi(info);
+	if (add_smi(info))
+		kfree(info);
+
+	return 0;
 }
 
 static void __devexit ipmi_pci_remove(struct pci_dev *pdev)
@@ -2575,7 +2589,12 @@ static int __devinit ipmi_of_probe(struct of_device *dev,
 
 	dev_set_drvdata(&dev->dev, info);
 
-	return add_smi(info);
+	if (add_smi(info)) {
+		kfree(info);
+		return -EBUSY;
+	}
+
+	return 0;
 }
 
 static int __devexit ipmi_of_remove(struct of_device *dev)
@@ -3008,6 +3027,8 @@ static __devinit void default_find_bmc(void)
 				info->io.addr_data);
 			} else
 				cleanup_one_si(info);
+		} else {
+			kfree(info);
 		}
 	}
 }