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From: Michal Nazarewicz on 13 May 2010 14:00
This patch changes msg_do_config() function so that it uses
a static object for a fsg_common structure instead of dynamically
allocated. This is a micro-optimisation.

Signed-off-by: Michal Nazarewicz <m.nazarewicz(a)samsung.com>
---
drivers/usb/gadget/mass_storage.c | 13 +++++++------
1 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/gadget/mass_storage.c b/drivers/usb/gadget/mass_storage.c
index d574bad..d85ca27 100644
--- a/drivers/usb/gadget/mass_storage.c
+++ b/drivers/usb/gadget/mass_storage.c
@@ -143,7 +143,7 @@ static int msg_thread_exits(struct fsg_common *common)

static int __init msg_do_config(struct usb_configuration *c)
{
- struct fsg_common *common;
+ static struct fsg_common common, *retp;
struct fsg_config config;
int ret;

@@ -156,12 +156,13 @@ static int __init msg_do_config(struct usb_configuration *c)
config.ops = &(const struct fsg_operations){
.thread_exits = msg_thread_exits,
};
- common = fsg_common_init(0, c->cdev, &config);
- if (IS_ERR(common))
- return PTR_ERR(common);

- ret = fsg_add(c->cdev, c, common);
- fsg_common_put(common);
+ retp = fsg_common_init(&common, c->cdev, &config);
+ if (IS_ERR(retp))
+ return PTR_ERR(retp);
+
+ ret = fsg_add(c->cdev, c, &common);
+ fsg_common_put(&common);
return ret;
}

--
1.7.1

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