X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=drivers%2Facpi%2Fapei%2Ferst-dbg.c;fp=drivers%2Facpi%2Fapei%2Ferst-dbg.c;h=da1228a9a544f026bab6c549e65892d439367266;hb=fdb8c58a1671beb51949412e053926acd5500b5f;hp=5281ddda2777c99c40f0830c1d4e5022cc5b37aa;hpb=64a32307b710c100beb101e9c78f8022f0e8ba61;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git

diff --git a/drivers/acpi/apei/erst-dbg.c b/drivers/acpi/apei/erst-dbg.c
index 5281ddda2777..da1228a9a544 100644
--- a/drivers/acpi/apei/erst-dbg.c
+++ b/drivers/acpi/apei/erst-dbg.c
@@ -2,7 +2,7 @@
  * APEI Error Record Serialization Table debug support
  *
  * ERST is a way provided by APEI to save and retrieve hardware error
- * infomation to and from a persistent store. This file provide the
+ * information to and from a persistent store. This file provide the
  * debugging/testing support for ERST kernel support and firmware
  * implementation.
  *
@@ -111,11 +111,13 @@ retry:
 		goto out;
 	}
 	if (len > erst_dbg_buf_len) {
-		kfree(erst_dbg_buf);
+		void *p;
 		rc = -ENOMEM;
-		erst_dbg_buf = kmalloc(len, GFP_KERNEL);
-		if (!erst_dbg_buf)
+		p = kmalloc(len, GFP_KERNEL);
+		if (!p)
 			goto out;
+		kfree(erst_dbg_buf);
+		erst_dbg_buf = p;
 		erst_dbg_buf_len = len;
 		goto retry;
 	}
@@ -150,11 +152,13 @@ static ssize_t erst_dbg_write(struct file *filp, const char __user *ubuf,
 	if (mutex_lock_interruptible(&erst_dbg_mutex))
 		return -EINTR;
 	if (usize > erst_dbg_buf_len) {
-		kfree(erst_dbg_buf);
+		void *p;
 		rc = -ENOMEM;
-		erst_dbg_buf = kmalloc(usize, GFP_KERNEL);
-		if (!erst_dbg_buf)
+		p = kmalloc(usize, GFP_KERNEL);
+		if (!p)
 			goto out;
+		kfree(erst_dbg_buf);
+		erst_dbg_buf = p;
 		erst_dbg_buf_len = usize;
 	}
 	rc = copy_from_user(erst_dbg_buf, ubuf, usize);