linux-kernel - [PATCH 10/12] drivers/usb: Correct size given to memset

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Message-ID: <Pine.LNX.4.64.0912092025050.1870@ask.diku.dk>
Date:	Wed, 9 Dec 2009 20:25:23 +0100 (CET)
From:	Julia Lawall <julia@...u.dk>
To:	David Brownell <dbrownell@...rs.sourceforge.net>,
	Greg Kroah-Hartman <gregkh@...e.de>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 10/12] drivers/usb: Correct size given to memset

From: Julia Lawall <julia@...u.dk>

Memset should be given the size of the structure, not the size of the pointer.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
type T;
T *x;
expression E;
@@

memset(x, E, sizeof(
+ *
 x))
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 drivers/usb/gadget/f_mass_storage.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -u -p a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -2675,7 +2675,7 @@ static struct fsg_common *fsg_common_ini
 			return ERR_PTR(-ENOMEM);
 		common->free_storage_on_release = 1;
 	} else {
-		memset(common, 0, sizeof common);
+		memset(common, 0, sizeof *common);
 		common->free_storage_on_release = 0;
 	}
 
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