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[PATCH] tpm: sysfs owernship changes

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In the current driver all sysfs files end up owned by the base driver module
rather than the module that actually owns the device this is a problem if the
module is unloaded and the file is open.  This patch fixes all that and lumps
the files into an attribute_group.

Signed-off-by: Kylene Hall <kjhall@us.ibm.com>
Signed-off-by: Yani Ioannou <yani.ioannou@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Kylene Hall
2005-06-23 22:02:00 -07:00
committed by Linus Torvalds
parent 81179bb6a5
commit 6659ca2ab6
4 changed files with 64 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/char/tpm/tpm.c
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@@ -208,7 +208,8 @@ static const u8 pcrread[] = {
0, 0, 0, 0 /* PCR index */
};
static ssize_t show_pcrs(struct device *dev, struct device_attribute *attr, char *buf)
ssize_t tpm_show_pcrs(struct device *dev, struct device_attribute *attr,
char *buf)
{
u8 data[READ_PCR_RESULT_SIZE];
ssize_t len;
@@ -243,7 +244,7 @@ static ssize_t show_pcrs(struct device *dev, struct device_attribute *attr, char
return str - buf;
}
static DEVICE_ATTR(pcrs, S_IRUGO, show_pcrs, NULL);
EXPORT_SYMBOL_GPL(tpm_show_pcrs);
#define READ_PUBEK_RESULT_SIZE 314
static const u8 readpubek[] = {
@@ -252,7 +253,8 @@ static const u8 readpubek[] = {
0, 0, 0, 124, /* TPM_ORD_ReadPubek */
};
static ssize_t show_pubek(struct device *dev, struct device_attribute *attr, char *buf)
ssize_t tpm_show_pubek(struct device *dev, struct device_attribute *attr,
char *buf)
{
u8 *data;
ssize_t len;
@@ -311,7 +313,7 @@ out:
return rc;
}
static DEVICE_ATTR(pubek, S_IRUGO, show_pubek, NULL);
EXPORT_SYMBOL_GPL(tpm_show_pubek);
#define CAP_VER_RESULT_SIZE 18
static const u8 cap_version[] = {
@@ -332,7 +334,8 @@ static const u8 cap_manufacturer[] = {
0, 0, 1, 3
};
static ssize_t show_caps(struct device *dev, struct device_attribute *attr, char *buf)
ssize_t tpm_show_caps(struct device *dev, struct device_attribute *attr,
char *buf)
{
u8 data[sizeof(cap_manufacturer)];
ssize_t len;
@@ -365,8 +368,20 @@ static ssize_t show_caps(struct device *dev, struct device_attribute *attr, char
return str - buf;
}
EXPORT_SYMBOL_GPL(tpm_show_caps);
ssize_t tpm_store_cancel(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct tpm_chip *chip = dev_get_drvdata(dev);
if (chip == NULL)
return 0;
chip->vendor->cancel(chip);
return count;
}
EXPORT_SYMBOL_GPL(tpm_store_cancel);
static DEVICE_ATTR(caps, S_IRUGO, show_caps, NULL);
/*
* Device file system interface to the TPM
@@ -517,9 +532,7 @@ void __devexit tpm_remove(struct pci_dev *pci_dev)
pci_set_drvdata(pci_dev, NULL);
misc_deregister(&chip->vendor->miscdev);
device_remove_file(&pci_dev->dev, &dev_attr_pubek);
device_remove_file(&pci_dev->dev, &dev_attr_pcrs);
device_remove_file(&pci_dev->dev, &dev_attr_caps);
sysfs_remove_group(&pci_dev->dev.kobj, chip->vendor->attr_group);
pci_disable_device(pci_dev);
@@ -648,9 +661,7 @@ dev_num_search_complete:
list_add(&chip->list, &tpm_chip_list);
device_create_file(&pci_dev->dev, &dev_attr_pubek);
device_create_file(&pci_dev->dev, &dev_attr_pcrs);
device_create_file(&pci_dev->dev, &dev_attr_caps);
sysfs_create_group(&pci_dev->dev.kobj, chip->vendor->attr_group);
return 0;
}