From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcin Slusarz Subject: [PATCH] video: limit stack usage of ir-kbd-i2c.c Date: Mon, 25 Feb 2008 21:51:00 +0100 Message-ID: <20080225205055.GA27455@joi> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org To: LKML Cc: Mauro Carvalho Chehab , Jean Delvare , i2c@lm-sensors.org, video4linux-list@redhat.com List-Id: linux-i2c@vger.kernel.org ir_probe allocated struct i2c_client on stack; it's pretty big structure, so allocate it with kzalloc make checkstack output without this patch: x059d ir_probe [ir-kbd-i2c]: 1000 compile tested only Signed-off-by: Marcin Slusarz Cc: Mauro Carvalho Chehab Cc: Jean Delvare --- drivers/media/video/ir-kbd-i2c.c | 18 +++++++++++------- 1 files changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/media/video/ir-kbd-i2c.c b/drivers/media/video/ir-kbd-i2c.c index 9851987..aec122f 100644 --- a/drivers/media/video/ir-kbd-i2c.c +++ b/drivers/media/video/ir-kbd-i2c.c @@ -510,9 +510,9 @@ static int ir_probe(struct i2c_adapter *adap) static const int probe_cx88[] = { 0x18, 0x6b, 0x71, -1 }; static const int probe_cx23885[] = { 0x6b, -1 }; const int *probe = NULL; - struct i2c_client c; + struct i2c_client *c; unsigned char buf; - int i,rc; + int i, rc; switch (adap->id) { case I2C_HW_B_BT848: @@ -537,19 +537,23 @@ static int ir_probe(struct i2c_adapter *adap) if (NULL == probe) return 0; - memset(&c,0,sizeof(c)); - c.adapter = adap; + c = kzalloc(sizeof(*c), GFP_KERNEL); + if (!c) + return -ENOMEM; + + c->adapter = adap; for (i = 0; -1 != probe[i]; i++) { - c.addr = probe[i]; - rc = i2c_master_recv(&c,&buf,0); + c->addr = probe[i]; + rc = i2c_master_recv(c, &buf, 0); dprintk(1,"probe 0x%02x @ %s: %s\n", probe[i], adap->name, (0 == rc) ? "yes" : "no"); if (0 == rc) { - ir_attach(adap,probe[i],0,0); + ir_attach(adap, probe[i], 0, 0); break; } } + kfree(c); return 0; } -- 1.5.3.7