When compiling 2.6.34-rc7 I see the following warnings
drivers/media/dvb/frontends/dib3000mc.c: In function 'dib3000mc_i2c_enumeration':
drivers/media/dvb/frontends/dib3000mc.c:853: warning: the frame size of 2224 bytes is larger than 2048 bytes
drivers/media/dvb/frontends/dib7000p.c: In function 'dib7000p_i2c_enumeration':
drivers/media/dvb/frontends/dib7000p.c:1346: warning: the frame size of 2304 bytes is larger than 2048 bytes
because the dib*_state structs are large and they are alloc'd on the stack.
This patch moves the structures off the stack.
I also noticed that the cxusb driver doesn't check the return value from
dib7000p_i2c_enumeration().
Signed-off-by: Prarit Bhargava <prarit@xxxxxxxxxx>
diff --git a/drivers/media/dvb/dvb-usb/cxusb.c b/drivers/media/dvb/dvb-usb/cxusb.c
index 960376d..8141b10 100644
--- a/drivers/media/dvb/dvb-usb/cxusb.c
+++ b/drivers/media/dvb/dvb-usb/cxusb.c
@@ -1025,8 +1025,11 @@ static int cxusb_dualdig4_rev2_frontend_attach(struct dvb_usb_adapter *adap)
cxusb_bluebird_gpio_pulse(adap->dev, 0x02, 1);
- dib7000p_i2c_enumeration(&adap->dev->i2c_adap, 1, 18,
- &cxusb_dualdig4_rev2_config);
+ if (dib7000p_i2c_enumeration(&adap->dev->i2c_adap, 1, 18,
+ &cxusb_dualdig4_rev2_config)) {
+ printk(KERN_WARNING "Unable to enumerate dib7000p\n");
+ return -ENODEV;
+ }
adap->fe = dvb_attach(dib7000p_attach, &adap->dev->i2c_adap, 0x80,
&cxusb_dualdig4_rev2_config);
diff --git a/drivers/media/dvb/frontends/dib3000mc.c b/drivers/media/dvb/frontends/dib3000mc.c
index 40a0998..6a178f1 100644
--- a/drivers/media/dvb/frontends/dib3000mc.c
+++ b/drivers/media/dvb/frontends/dib3000mc.c
@@ -814,42 +814,52 @@ EXPORT_SYMBOL(dib3000mc_set_config);
int dib3000mc_i2c_enumeration(struct i2c_adapter *i2c, int no_of_demods, u8 default_addr, struct dib3000mc_config cfg[])
{
- struct dib3000mc_state st = { .i2c_adap = i2c };
+ struct dib3000mc_state *st;
int k;
u8 new_addr;
-
static u8 DIB3000MC_I2C_ADDRESS[] = {20,22,24,26};
+ st = kzalloc(sizeof(*st), GFP_KERNEL);
+ if (!st)
+ return -ENOMEM;
+ st->i2c_adap = i2c;
+
for (k = no_of_demods-1; k >= 0; k--) {
- st.cfg = &cfg[k];
+ st->cfg = &cfg[k];
/* designated i2c address */
- new_addr = DIB3000MC_I2C_ADDRESS[k];
- st.i2c_addr = new_addr;
- if (dib3000mc_identify(&st) != 0) {
- st.i2c_addr = default_addr;
- if (dib3000mc_identify(&st) != 0) {
- dprintk("-E- DiB3000P/MC #%d: not identified\n", k);
+ new_addr = DIB3000MC_I2C_ADDRESS[k];
+ st->i2c_addr = new_addr;
+ if (dib3000mc_identify(st) != 0) {
+ st->i2c_addr = default_addr;
+ if (dib3000mc_identify(st) != 0) {
+ dprintk("-E- DiB3000P/MC #%d: not"
+ " identified\n", k);
+ kfree(st);
return -ENODEV;
}
}
- dib3000mc_set_output_mode(&st, OUTMODE_MPEG2_PAR_CONT_CLK);
+ dib3000mc_set_output_mode(st, OUTMODE_MPEG2_PAR_CONT_CLK);
- // set new i2c address and force divstr (Bit 1) to value 0 (Bit 0)
- dib3000mc_write_word(&st, 1024, (new_addr << 3) | 0x1);
- st.i2c_addr = new_addr;
+ /* set new i2c address and force divstr (Bit 1) to
+ * value 0 (Bit 0)
+ */
+ dib3000mc_write_word(st, 1024, (new_addr << 3) | 0x1);
+ st->i2c_addr = new_addr;
}
for (k = 0; k < no_of_demods; k++) {
- st.cfg = &cfg[k];
- st.i2c_addr = DIB3000MC_I2C_ADDRESS[k];
+ st->cfg = &cfg[k];
+ st->i2c_addr = DIB3000MC_I2C_ADDRESS[k];
- dib3000mc_write_word(&st, 1024, st.i2c_addr << 3);
+ dib3000mc_write_word(st, 1024, st->i2c_addr << 3);
/* turn off data output */
- dib3000mc_set_output_mode(&st, OUTMODE_HIGH_Z);
+ dib3000mc_set_output_mode(st, OUTMODE_HIGH_Z);
}
+
+ kfree(st);
return 0;
}
EXPORT_SYMBOL(dib3000mc_i2c_enumeration);
diff --git a/drivers/media/dvb/frontends/dib7000p.c b/drivers/media/dvb/frontends/dib7000p.c
index 85468a4..08ea982 100644
--- a/drivers/media/dvb/frontends/dib7000p.c
+++ b/drivers/media/dvb/frontends/dib7000p.c
@@ -1322,48 +1322,59 @@ int dib7000p_pid_filter(struct dvb_frontend *fe, u8 id, u16 pid, u8 onoff)
}
EXPORT_SYMBOL(dib7000p_pid_filter);
-int dib7000p_i2c_enumeration(struct i2c_adapter *i2c, int no_of_demods, u8 default_addr, struct dib7000p_config cfg[])
+int dib7000p_i2c_enumeration(struct i2c_adapter *i2c, int no_of_demods,
+ u8 default_addr, struct dib7000p_config cfg[])
{
- struct dib7000p_state st = { .i2c_adap = i2c };
+ struct dib7000p_state *st;
int k = 0;
u8 new_addr = 0;
+ st = kmalloc(sizeof(*st), GFP_KERNEL);
+ if (!st)
+ return -ENOMEM;
+ st->i2c_adap = i2c;
+
for (k = no_of_demods-1; k >= 0; k--) {
- st.cfg = cfg[k];
+ st->cfg = cfg[k];
/* designated i2c address */
- new_addr = (0x40 + k) << 1;
- st.i2c_addr = new_addr;
- dib7000p_write_word(&st, 1287, 0x0003); /* sram lead in, rdy */
- if (dib7000p_identify(&st) != 0) {
- st.i2c_addr = default_addr;
- dib7000p_write_word(&st, 1287, 0x0003); /* sram lead in, rdy */
- if (dib7000p_identify(&st) != 0) {
+ new_addr = (0x40 + k) << 1;
+ st->i2c_addr = new_addr;
+ dib7000p_write_word(st, 1287, 0x0003); /* sram lead in, rdy */
+ if (dib7000p_identify(st) != 0) {
+ st->i2c_addr = default_addr;
+ /* sram lead in, rdy */
+ dib7000p_write_word(st, 1287, 0x0003);
+ if (dib7000p_identify(st) != 0) {
dprintk("DiB7000P #%d: not identified\n", k);
+ kfree(st);
return -EIO;
}
}
- /* start diversity to pull_down div_str - just for i2c-enumeration */
- dib7000p_set_output_mode(&st, OUTMODE_DIVERSITY);
+ /* start diversity to pull_down div_str - just for
+ * i2c-enumeration
+ */
+ dib7000p_set_output_mode(st, OUTMODE_DIVERSITY);
/* set new i2c address and force divstart */
- dib7000p_write_word(&st, 1285, (new_addr << 2) | 0x2);
+ dib7000p_write_word(st, 1285, (new_addr << 2) | 0x2);
dprintk("IC %d initialized (to i2c_address 0x%x)", k, new_addr);
}
for (k = 0; k < no_of_demods; k++) {
- st.cfg = cfg[k];
- st.i2c_addr = (0x40 + k) << 1;
+ st->cfg = cfg[k];
+ st->i2c_addr = (0x40 + k) << 1;
- // unforce divstr
- dib7000p_write_word(&st, 1285, st.i2c_addr << 2);
+ /* unforce divstr */
+ dib7000p_write_word(st, 1285, st->i2c_addr << 2);
/* deactivate div - it was just for i2c-enumeration */
- dib7000p_set_output_mode(&st, OUTMODE_HIGH_Z);
+ dib7000p_set_output_mode(st, OUTMODE_HIGH_Z);
}
+ kfree(st);
return 0;
}
EXPORT_SYMBOL(dib7000p_i2c_enumeration);
--
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