From: Phil Carmody <pc+lkml@asdf.org>
Date: Tue, 16 Sep 2014 22:00:53 +0000 (+0300)
Subject: powerpc/via-pmu: fix error path in find_via_pmu()
X-Git-Tag: firefly_0821_release~176^2~1959^2~70^2~10
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ffa3eb010dd8edc696cd958ba684d8a6d1cf3dff;p=firefly-linux-kernel-4.4.55.git

powerpc/via-pmu: fix error path in find_via_pmu()

Cleanup was not in the reverse order from the set-up, so not all
the gotos made sense, and also it was being avoided completely upon
failure of init_pmu().

Signed-off-by: Phil Carmody <pc+lkml@asdf.org>
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
index dee88e59f0d3..62212358640d 100644
--- a/drivers/macintosh/via-pmu.c
+++ b/drivers/macintosh/via-pmu.c
@@ -332,7 +332,7 @@ int __init find_via_pmu(void)
 		}
 		if (gpio_reg == NULL) {
 			printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
-			goto fail_gpio;
+			goto fail;
 		}
 	} else
 		pmu_kind = PMU_UNKNOWN;
@@ -340,7 +340,7 @@ int __init find_via_pmu(void)
 	via = ioremap(taddr, 0x2000);
 	if (via == NULL) {
 		printk(KERN_ERR "via-pmu: Can't map address !\n");
-		goto fail;
+		goto fail_via_remap;
 	}
 	
 	out_8(&via[IER], IER_CLR | 0x7f);	/* disable all intrs */
@@ -348,10 +348,8 @@ int __init find_via_pmu(void)
 
 	pmu_state = idle;
 
-	if (!init_pmu()) {
-		via = NULL;
-		return 0;
-	}
+	if (!init_pmu())
+		goto fail_init;
 
 	printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 	       PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
@@ -359,11 +357,15 @@ int __init find_via_pmu(void)
 	sys_ctrler = SYS_CTRLER_PMU;
 	
 	return 1;
- fail:
-	of_node_put(vias);
+
+ fail_init:
+	iounmap(via);
+	via = NULL;
+ fail_via_remap:
 	iounmap(gpio_reg);
 	gpio_reg = NULL;
- fail_gpio:
+ fail:
+	of_node_put(vias);
 	vias = NULL;
 	return 0;
 }