fat: i_blocks warning fix

[linux-2.6-omap-h63xx.git] / fs / sysfs / bin.c

diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c
index 006fc64227ddb16b051b85b0a959cfee7bd652a8..66f6e58a7e4bb1a52590f4eecbb4094647c61c4f 100644 (file)
--- a/fs/sysfs/bin.c
+++ b/fs/sysfs/bin.c
@@ -61,6 +61,7 @@ read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off)
        int size = dentry->d_inode->i_size;
        loff_t offs = *off;
        int count = min_t(size_t, bytes, PAGE_SIZE);
+       char *temp;
 
        if (size) {
                if (offs > size)
@@ -69,23 +70,33 @@ read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off)
                        count = size - offs;
        }
 
+       temp = kmalloc(count, GFP_KERNEL);
+       if (!temp)
+               return -ENOMEM;
+
        mutex_lock(&bb->mutex);
 
        count = fill_read(dentry, bb->buffer, offs, count);
-       if (count < 0)
-               goto out_unlock;
+       if (count < 0) {
+               mutex_unlock(&bb->mutex);
+               goto out_free;
+       }
 
-       if (copy_to_user(userbuf, bb->buffer, count)) {
+       memcpy(temp, bb->buffer, count);
+
+       mutex_unlock(&bb->mutex);
+
+       if (copy_to_user(userbuf, temp, count)) {
                count = -EFAULT;
-               goto out_unlock;
+               goto out_free;
        }
 
        pr_debug("offs = %lld, *off = %lld, count = %d\n", offs, *off, count);
 
        *off = offs + count;
 
- out_unlock:
-       mutex_unlock(&bb->mutex);
+ out_free:
+       kfree(temp);
        return count;
 }
 
@@ -118,6 +129,7 @@ static ssize_t write(struct file *file, const char __user *userbuf,
        int size = dentry->d_inode->i_size;
        loff_t offs = *off;
        int count = min_t(size_t, bytes, PAGE_SIZE);
+       char *temp;
 
        if (size) {
                if (offs > size)
@@ -126,19 +138,27 @@ static ssize_t write(struct file *file, const char __user *userbuf,
                        count = size - offs;
        }
 
-       mutex_lock(&bb->mutex);
+       temp = kmalloc(count, GFP_KERNEL);
+       if (!temp)
+               return -ENOMEM;
 
-       if (copy_from_user(bb->buffer, userbuf, count)) {
+       if (copy_from_user(temp, userbuf, count)) {
                count = -EFAULT;
-               goto out_unlock;
+               goto out_free;
        }
 
+       mutex_lock(&bb->mutex);
+
+       memcpy(bb->buffer, temp, count);
+
        count = flush_write(dentry, bb->buffer, offs, count);
+       mutex_unlock(&bb->mutex);
+
        if (count > 0)
                *off = offs + count;
 
- out_unlock:
-       mutex_unlock(&bb->mutex);
+out_free:
+       kfree(temp);
        return count;
 }