[PATCH] tpm: fix misc name memory problem

I was using invalid memory for the miscdevice.name.  This patch fixes the
problem which was manifested by an ugly entry in /proc/misc.

Signed-off-by: Kylene Hall <kjhall@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 1156d11f02d9..854475c54f0e 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -464,6 +464,7 @@ void __devexit tpm_remove(struct pci_dev *pci_dev)
 
         pci_set_drvdata(pci_dev, NULL);
         misc_deregister(&chip->vendor->miscdev);
+        kfree(&chip->vendor->miscdev.name);
 
         sysfs_remove_group(&pci_dev->dev.kobj, chip->vendor->attr_group);
 
@@ -526,7 +527,9 @@ EXPORT_SYMBOL_GPL(tpm_pm_resume);
 int tpm_register_hardware(struct pci_dev *pci_dev,
                           struct tpm_vendor_specific *entry)
 {
-        char devname[7];
+#define DEVNAME_SIZE 7
+
+        char *devname;
         struct tpm_chip *chip;
         int i, j;
 
@@ -569,7 +572,8 @@ dev_num_search_complete:
         else
                 chip->vendor->miscdev.minor = MISC_DYNAMIC_MINOR;
 
-        snprintf(devname, sizeof(devname), "%s%d", "tpm", chip->dev_num);
+        devname = kmalloc(DEVNAME_SIZE, GFP_KERNEL);
+        scnprintf(devname, DEVNAME_SIZE, "%s%d", "tpm", chip->dev_num);
         chip->vendor->miscdev.name = devname;
 
         chip->vendor->miscdev.dev = &(pci_dev->dev);