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usb: gadget: ffs: fix enable multiple instances

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This patch fixes an "off-by-one" bug found in
581791f (FunctionFS: enable multiple functions).

During gfs_bind/gfs_unbind the functionfs_bind/functionfs_unbind should be
called for every functionfs instance. With the "i" pre-decremented they
were not called for the zeroth instance.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: <stable@vger.kernel.org>

[ balbi@ti.com : added offending commit's subject ]

Signed-off-by: Felipe Balbi <balbi@ti.com>
Change-Id: Idf19c2d3842546fb0fb47f77f59a248b1caa3fcb
This commit is contained in:
Andrzej Pietrasiewicz 2013-03-11 16:32:14 +01:00 committed by Nolen Johnson
parent 3e34c77b60
commit 01935051eb
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/gadget/g_ffs.c
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@ -358,7 +358,7 @@ static int gfs_bind(struct usb_composite_dev *cdev)
if (unlikely(ret < 0))
goto error;
for (i = func_num; --i; ) {
for (i = func_num; i--; ) {
ret = functionfs_bind(ffs_tab[i].ffs_data, cdev);
if (unlikely(ret < 0)) {
while (++i < func_num)
@ -413,7 +413,7 @@ static int gfs_unbind(struct usb_composite_dev *cdev)
gether_cleanup();
gfs_ether_setup = false;
for (i = func_num; --i; )
for (i = func_num; i--; )
if (ffs_tab[i].ffs_data)
functionfs_unbind(ffs_tab[i].ffs_data);