--=_courier-15226-1055571921-0001-2
Content-Type: multipart/mixed; boundary="=-s9L8rOx87mhzJDPrzJr3"
--=-s9L8rOx87mhzJDPrzJr3
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable
On Fri, 2003-06-13 at 04:36, Mark M. Hoffman wrote:
> > > > Anyhow, Only change I have made to the w83781d driver, is one line
> > > > (just tell it to that if the chip id is 0x72, its also of type
> > > > w83726HF), but now (2.5.70-bk1[123]) it segfaults for me on rmmod, =
where
> > > > it did not with 2.5.68 kernels when I still had the other board. I=
will
> > > > attach a oops tomorrow or such when I get home.
> > >=20
> My first patch was naive; the patch below solves the problem by
> letting w83781d_detach_client remove the three clients (1 * primary
> + 2 * subclients) independently. It's a noisy patch because I had
> to change the way the subclients were kmalloc'ed - sorry. The meat
> is around line 1422. This patch works for me... comments?
>=20
> Regards,
>=20
> ---=20
> Mark M. Hoffman
> mhoffman@lightlink.com
Greg, this patch from Mark fixes it, please include in your stuff
to send to Linus.
Thanks,
--=20
Martin Schlemmer
--=-s9L8rOx87mhzJDPrzJr3
Content-Disposition: attachment; filename=w83781d-fix-rmmod-segfault.patch
Content-Type: text/plain; name=w83781d-fix-rmmod-segfault.patch; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
--- linux-2.5.70-bk14/drivers/i2c/chips/w83781d.c 2003-06-10 00:49:19.00000=
0000 -0400
+++ linux-2.5.70/drivers/i2c/chips/w83781d.c 2003-06-12 22:24:47.000000000 =
-0400
@@ -299,8 +299,8 @@
char valid; /* !=3D0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
=20
- struct i2c_client *lm75; /* for secondary I2C addresses */
- /* pointer to array of 2 subclients */
+ struct i2c_client *lm75[2]; /* for secondary I2C addresses */
+ /* array of 2 pointers to subclients */
=20
u8 in[9]; /* Register value - 8 & 9 for 782D only */
u8 in_max[9]; /* Register value - 8 & 9 for 782D only */
@@ -1043,12 +1043,12 @@
const char *client_name;
struct w83781d_data *data =3D i2c_get_clientdata(new_client);
=20
- if (!(data->lm75 =3D kmalloc(2 * sizeof (struct i2c_client),
- GFP_KERNEL))) {
+ data->lm75[0] =3D kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
+ if (!(data->lm75[0])) {
err =3D -ENOMEM;
goto ERROR_SC_0;
}
- memset(data->lm75, 0x00, 2 * sizeof (struct i2c_client));
+ memset(data->lm75[0], 0x00, sizeof (struct i2c_client));
=20
id =3D i2c_adapter_id(adapter);
=20
@@ -1066,25 +1066,33 @@
w83781d_write_value(new_client, W83781D_REG_I2C_SUBADDR,
(force_subclients[2] & 0x07) |
((force_subclients[3] & 0x07) << 4));
- data->lm75[0].addr =3D force_subclients[2];
+ data->lm75[0]->addr =3D force_subclients[2];
} else {
val1 =3D w83781d_read_value(new_client, W83781D_REG_I2C_SUBADDR);
- data->lm75[0].addr =3D 0x48 + (val1 & 0x07);
+ data->lm75[0]->addr =3D 0x48 + (val1 & 0x07);
}
=20
if (kind !=3D w83783s) {
+
+ data->lm75[1] =3D kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
+ if (!(data->lm75[1])) {
+ err =3D -ENOMEM;
+ goto ERROR_SC_1;
+ }
+ memset(data->lm75[1], 0x0, sizeof(struct i2c_client));
+
if (force_subclients[0] =3D=3D id &&
force_subclients[1] =3D=3D address) {
- data->lm75[1].addr =3D force_subclients[3];
+ data->lm75[1]->addr =3D force_subclients[3];
} else {
- data->lm75[1].addr =3D 0x48 + ((val1 >> 4) & 0x07);
+ data->lm75[1]->addr =3D 0x48 + ((val1 >> 4) & 0x07);
}
- if (data->lm75[0].addr =3D=3D data->lm75[1].addr) {
+ if (data->lm75[0]->addr =3D=3D data->lm75[1]->addr) {
dev_err(&new_client->dev,
"Duplicate addresses 0x%x for subclients.\n",
- data->lm75[0].addr);
+ data->lm75[0]->addr);
err =3D -EBUSY;
- goto ERROR_SC_1;
+ goto ERROR_SC_2;
}
}
=20
@@ -1103,19 +1111,19 @@
=20
for (i =3D 0; i <=3D 1; i++) {
/* store all data in w83781d */
- i2c_set_clientdata(&data->lm75[i], NULL);
- data->lm75[i].adapter =3D adapter;
- data->lm75[i].driver =3D &w83781d_driver;
- data->lm75[i].flags =3D 0;
- strlcpy(data->lm75[i].dev.name, client_name,
+ i2c_set_clientdata(data->lm75[i], NULL);
+ data->lm75[i]->adapter =3D adapter;
+ data->lm75[i]->driver =3D &w83781d_driver;
+ data->lm75[i]->flags =3D 0;
+ strlcpy(data->lm75[i]->dev.name, client_name,
DEVICE_NAME_SIZE);
- if ((err =3D i2c_attach_client(&(data->lm75[i])))) {
+ if ((err =3D i2c_attach_client(data->lm75[i]))) {
dev_err(&new_client->dev, "Subclient %d "
"registration at address 0x%x "
- "failed.\n", i, data->lm75[i].addr);
+ "failed.\n", i, data->lm75[i]->addr);
if (i =3D=3D 1)
- goto ERROR_SC_2;
- goto ERROR_SC_1;
+ goto ERROR_SC_3;
+ goto ERROR_SC_2;
}
if (kind =3D=3D w83783s)
break;
@@ -1124,10 +1132,14 @@
return 0;
=20
/* Undo inits in case of errors */
+ERROR_SC_3:
+ i2c_detach_client(data->lm75[0]);
ERROR_SC_2:
- i2c_detach_client(&(data->lm75[0]));
+ if (NULL !=3D data->lm75[1])
+ kfree(data->lm75[1]);
ERROR_SC_1:
- kfree(data->lm75);
+ if (NULL !=3D data->lm75[0])
+ kfree(data->lm75[0]);
ERROR_SC_0:
return err;
}
@@ -1326,7 +1338,8 @@
kind, new_client)))
goto ERROR3;
} else {
- data->lm75 =3D NULL;
+ data->lm75[0] =3D NULL;
+ data->lm75[1] =3D NULL;
}
=20
device_create_file_in(new_client, 0);
@@ -1409,20 +1422,11 @@
static int
w83781d_detach_client(struct i2c_client *client)
{
- struct w83781d_data *data =3D i2c_get_clientdata(client);
int err;
=20
- /* release ISA region or I2C subclients first */
- if (i2c_is_isa_client(client)) {
+ if (i2c_is_isa_client(client))
release_region(client->addr, W83781D_EXTENT);
- } else {
- i2c_detach_client(&data->lm75[0]);
- if (data->type !=3D w83783s)
- i2c_detach_client(&data->lm75[1]);
- kfree(data->lm75);
- }
=20
- /* now it's safe to scrap the rest */
if ((err =3D i2c_detach_client(client))) {
dev_err(&client->dev,
"Client deregistration failed, client not detached.\n");
@@ -1484,7 +1488,7 @@
res =3D i2c_smbus_read_byte_data(client, reg & 0xff);
} else {
/* switch to subclient */
- cl =3D &data->lm75[bank - 1];
+ cl =3D data->lm75[bank - 1];
/* convert from ISA to LM75 I2C addresses */
switch (reg & 0xff) {
case 0x50: /* TEMP */
@@ -1555,7 +1559,7 @@
value & 0xff);
} else {
/* switch to subclient */
- cl =3D &data->lm75[bank - 1];
+ cl =3D data->lm75[bank - 1];
/* convert from ISA to LM75 I2C addresses */
switch (reg & 0xff) {
case 0x52: /* CONFIG */
--=-s9L8rOx87mhzJDPrzJr3--
--=_courier-15226-1055571921-0001-2
Content-Type: application/pgp-signature; name="signature.asc"
Content-Transfer-Encoding: 7bit
Content-Description: This is a digitally signed message part
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.2 (GNU/Linux)
iD8DBQA+6sAbqburzKaJYLYRAuHZAJ9gOB31P+lf8fEt+a49EF/h0uw2IQCfUZKO
I3CroHfp+8W8m/n80IqAk0Q=
=Inyj
-----END PGP SIGNATURE-----
--=_courier-15226-1055571921-0001-2--