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authorZhang Rui <rui.zhang@intel.com>2007-06-09 13:57:22 +0800
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-11 16:09:09 -0700
commit91a6902958f052358899f58683d44e36228d85c2 (patch)
treea713792cf3bb09bdbd2ac6906aa44b3da3e49250 /drivers/firmware/dell_rbu.c
parent51225039f3cf9d250596d1344494b293274b9169 (diff)
sysfs: add parameter "struct bin_attribute *" in .read/.write methods for sysfs binary attributes
Well, first of all, I don't want to change so many files either. What I do: Adding a new parameter "struct bin_attribute *" in the .read/.write methods for the sysfs binary attributes. In fact, only the four lines change in fs/sysfs/bin.c and include/linux/sysfs.h do the real work. But I have to update all the files that use binary attributes to make them compatible with the new .read and .write methods. I'm not sure if I missed any. :( Why I do this: For a sysfs attribute, we can get a pointer pointing to the struct attribute in the .show/.store method, while we can't do this for the binary attributes. I don't know why this is different, but this does make it not so handy to use the binary attributes as the regular ones. So I think this patch is reasonable. :) Who benefits from it: The patch that exposes ACPI tables in sysfs requires such an improvement. All the table binary attributes share the same .read method. Parameter "struct bin_attribute *" is used to get the table signature and instance number which are used to distinguish different ACPI table binary attributes. Without this parameter, we need to offer different .read methods for different ACPI table binary attributes. This is impossible as there are various ACPI tables on different platforms, and we don't know what they are until they are loaded. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/firmware/dell_rbu.c')
-rw-r--r--drivers/firmware/dell_rbu.c25
1 files changed, 15 insertions, 10 deletions
diff --git a/drivers/firmware/dell_rbu.c b/drivers/firmware/dell_rbu.c
index f8afecb7d0c..477a3d0e3ca 100644
--- a/drivers/firmware/dell_rbu.c
+++ b/drivers/firmware/dell_rbu.c
@@ -543,8 +543,9 @@ static ssize_t read_rbu_mono_data(char *buffer, loff_t pos, size_t count)
return ret_count;
}
-static ssize_t read_rbu_data(struct kobject *kobj, char *buffer,
- loff_t pos, size_t count)
+static ssize_t read_rbu_data(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t pos, size_t count)
{
ssize_t ret_count = 0;
@@ -591,8 +592,9 @@ static void callbackfn_rbu(const struct firmware *fw, void *context)
spin_unlock(&rbu_data.lock);
}
-static ssize_t read_rbu_image_type(struct kobject *kobj, char *buffer,
- loff_t pos, size_t count)
+static ssize_t read_rbu_image_type(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t pos, size_t count)
{
int size = 0;
if (!pos)
@@ -600,8 +602,9 @@ static ssize_t read_rbu_image_type(struct kobject *kobj, char *buffer,
return size;
}
-static ssize_t write_rbu_image_type(struct kobject *kobj, char *buffer,
- loff_t pos, size_t count)
+static ssize_t write_rbu_image_type(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t pos, size_t count)
{
int rc = count;
int req_firm_rc = 0;
@@ -660,8 +663,9 @@ static ssize_t write_rbu_image_type(struct kobject *kobj, char *buffer,
return rc;
}
-static ssize_t read_rbu_packet_size(struct kobject *kobj, char *buffer,
- loff_t pos, size_t count)
+static ssize_t read_rbu_packet_size(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t pos, size_t count)
{
int size = 0;
if (!pos) {
@@ -672,8 +676,9 @@ static ssize_t read_rbu_packet_size(struct kobject *kobj, char *buffer,
return size;
}
-static ssize_t write_rbu_packet_size(struct kobject *kobj, char *buffer,
- loff_t pos, size_t count)
+static ssize_t write_rbu_packet_size(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t pos, size_t count)
{
unsigned long temp;
spin_lock(&rbu_data.lock);