From a58858556deb03ea4a464f84fe888692867ce377 Mon Sep 17 00:00:00 2001 From: Marcin Slusarz Date: Tue, 22 Apr 2008 14:45:33 -0300 Subject: [PATCH] V4L/DVB (7286): limit stack usage of ir-kbd-i2c.c 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 Signed-off-by: Marcin Slusarz Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/ir-kbd-i2c.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/media/video/ir-kbd-i2c.c b/drivers/media/video/ir-kbd-i2c.c index ba7a74979dfb..58a1ddddb09e 100644 --- a/drivers/media/video/ir-kbd-i2c.c +++ b/drivers/media/video/ir-kbd-i2c.c @@ -509,9 +509,9 @@ 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: @@ -536,19 +536,23 @@ 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; } -- 2.20.1