firmware: use memory_read_from_buffer()

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From: Linux Kernel Mailing List
Date: Friday, July 25, 2008 - 12:10 pm

Gitweb:     http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f37e66...
Commit:     f37e66173e0cc09b4e5a89eb0294abbefc15f435
Parent:     ec905a18656daa4d9300bad2bebc02d5dba7883d
Author:     Akinobu Mita <akinobu.mita@gmail.com>
AuthorDate: Fri Jul 25 01:48:23 2008 -0700
Committer:  Linus Torvalds <torvalds@linux-foundation.org>
CommitDate: Fri Jul 25 10:53:44 2008 -0700

    firmware: use memory_read_from_buffer()
    
    Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
    Cc: Greg Kroah-Hartman <gregkh@suse.de>
    Cc: Markus Rechberger <markus.rechberger@amd.com>
    Cc: Kay Sievers <kay.sievers@vrfy.org>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/base/firmware_class.c |   12 +++---------
 1 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index b0be1d1..c9c92b0 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -184,7 +184,7 @@ firmware_data_read(struct kobject *kobj, struct bin_attribute *bin_attr,
 	struct device *dev = to_dev(kobj);
 	struct firmware_priv *fw_priv = dev_get_drvdata(dev);
 	struct firmware *fw;
-	ssize_t ret_count = count;
+	ssize_t ret_count;
 
 	mutex_lock(&fw_lock);
 	fw = fw_priv->fw;
@@ -192,14 +192,8 @@ firmware_data_read(struct kobject *kobj, struct bin_attribute *bin_attr,
 		ret_count = -ENODEV;
 		goto out;
 	}
-	if (offset > fw->size) {
-		ret_count = 0;
-		goto out;
-	}
-	if (offset + ret_count > fw->size)
-		ret_count = fw->size - offset;
-
-	memcpy(buffer, fw->data + offset, ret_count);
+	ret_count = memory_read_from_buffer(buffer, count, &offset,
+						fw->data, fw->size);
 out:
 	mutex_unlock(&fw_lock);
 	return ret_count;
--
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firmware: use memory_read_from_buffer(), Linux Kernel Mailing ..., (Fri Jul 25, 12:10 pm)