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usb: gadget: f_mass_storage: create _fsg_common_free_buffers

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When configfs is in place, gadgets will have to be able to free
fsg buffers. Add a helper function.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Andrzej Pietrasiewicz 2013-10-09 10:05:52 +02:00 committed by Felipe Balbi
parent e9edd199d6
commit 8502d66d33
1 changed files with 13 additions and 9 deletions
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22
drivers/usb/gadget/f_mass_storage.c
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@ -2642,6 +2642,18 @@ static inline int fsg_num_buffers_validate(unsigned int fsg_num_buffers)
return -EINVAL;
}
static void _fsg_common_free_buffers(struct fsg_buffhd *buffhds, unsigned n)
{
if (buffhds) {
struct fsg_buffhd *bh = buffhds;
while (n--) {
kfree(bh->buf);
++bh;
}
kfree(buffhds);
}
}
struct fsg_common *fsg_common_init(struct fsg_common *common,
struct usb_composite_dev *cdev,
struct fsg_config *cfg)
@ -2897,15 +2909,7 @@ static void fsg_common_release(struct kref *ref)
kfree(common->luns);
}
{
struct fsg_buffhd *bh = common->buffhds;
unsigned i = common->fsg_num_buffers;
do {
kfree(bh->buf);
} while (++bh, --i);
}
kfree(common->buffhds);
_fsg_common_free_buffers(common->buffhds, common->fsg_num_buffers);
if (common->free_storage_on_release)
kfree(common);
}