* [PATCH] i2c: i801: Fix the i2c-mux gpiod_lookup_table not being properly terminated
@ 2020-12-21 13:42 Hans de Goede
2020-12-21 13:55 ` Mika Westerberg
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: Hans de Goede @ 2020-12-21 13:42 UTC (permalink / raw)
To: Jean Delvare, Wolfram Sang
Cc: Hans de Goede, linux-i2c, Serge Semin, Linus Walleij,
Andy Shevchenko, Mika Westerberg
gpiod_add_lookup_table() expects the gpiod_lookup_table->table passed to
it to be terminated with a zero-ed out entry.
So we need to allocate one more entry then we will use.
Cc: Serge Semin <fancer.lancer@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Andy Shevchenko <andy@infradead.org>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Fixes: d308dfbf62ef ("i2c: mux/i801: Switch to use descriptor passing")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/i2c/busses/i2c-i801.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index ae90713443fa..877fe3733a42 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -1449,7 +1449,7 @@ static int i801_add_mux(struct i801_priv *priv)
/* Register GPIO descriptor lookup table */
lookup = devm_kzalloc(dev,
- struct_size(lookup, table, mux_config->n_gpios),
+ struct_size(lookup, table, mux_config->n_gpios + 1),
GFP_KERNEL);
if (!lookup)
return -ENOMEM;
--
2.28.0
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] i2c: i801: Fix the i2c-mux gpiod_lookup_table not being properly terminated
2020-12-21 13:42 [PATCH] i2c: i801: Fix the i2c-mux gpiod_lookup_table not being properly terminated Hans de Goede
@ 2020-12-21 13:55 ` Mika Westerberg
2020-12-21 15:12 ` Jean Delvare
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Mika Westerberg @ 2020-12-21 13:55 UTC (permalink / raw)
To: Hans de Goede
Cc: Jean Delvare, Wolfram Sang, linux-i2c, Serge Semin, Linus Walleij,
Andy Shevchenko
On Mon, Dec 21, 2020 at 02:42:25PM +0100, Hans de Goede wrote:
> gpiod_add_lookup_table() expects the gpiod_lookup_table->table passed to
> it to be terminated with a zero-ed out entry.
>
> So we need to allocate one more entry then we will use.
>
> Cc: Serge Semin <fancer.lancer@gmail.com>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Andy Shevchenko <andy@infradead.org>
> Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] i2c: i801: Fix the i2c-mux gpiod_lookup_table not being properly terminated
2020-12-21 13:42 [PATCH] i2c: i801: Fix the i2c-mux gpiod_lookup_table not being properly terminated Hans de Goede
2020-12-21 13:55 ` Mika Westerberg
@ 2020-12-21 15:12 ` Jean Delvare
2020-12-27 22:41 ` Linus Walleij
2021-01-04 18:26 ` Wolfram Sang
3 siblings, 0 replies; 5+ messages in thread
From: Jean Delvare @ 2020-12-21 15:12 UTC (permalink / raw)
To: Hans de Goede
Cc: Wolfram Sang, linux-i2c, Serge Semin, Linus Walleij,
Andy Shevchenko, Mika Westerberg
Hi Hans,
On Mon, 21 Dec 2020 14:42:25 +0100, Hans de Goede wrote:
> gpiod_add_lookup_table() expects the gpiod_lookup_table->table passed to
> it to be terminated with a zero-ed out entry.
>
> So we need to allocate one more entry then we will use.
>
> Cc: Serge Semin <fancer.lancer@gmail.com>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Andy Shevchenko <andy@infradead.org>
> Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
> Fixes: d308dfbf62ef ("i2c: mux/i801: Switch to use descriptor passing")
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> ---
> drivers/i2c/busses/i2c-i801.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
> index ae90713443fa..877fe3733a42 100644
> --- a/drivers/i2c/busses/i2c-i801.c
> +++ b/drivers/i2c/busses/i2c-i801.c
> @@ -1449,7 +1449,7 @@ static int i801_add_mux(struct i801_priv *priv)
>
> /* Register GPIO descriptor lookup table */
> lookup = devm_kzalloc(dev,
> - struct_size(lookup, table, mux_config->n_gpios),
> + struct_size(lookup, table, mux_config->n_gpios + 1),
> GFP_KERNEL);
> if (!lookup)
> return -ENOMEM;
Good catch.
Acked-by: Jean Delvare <jdelvare@suse.de>
--
Jean Delvare
SUSE L3 Support
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] i2c: i801: Fix the i2c-mux gpiod_lookup_table not being properly terminated
2020-12-21 13:42 [PATCH] i2c: i801: Fix the i2c-mux gpiod_lookup_table not being properly terminated Hans de Goede
2020-12-21 13:55 ` Mika Westerberg
2020-12-21 15:12 ` Jean Delvare
@ 2020-12-27 22:41 ` Linus Walleij
2021-01-04 18:26 ` Wolfram Sang
3 siblings, 0 replies; 5+ messages in thread
From: Linus Walleij @ 2020-12-27 22:41 UTC (permalink / raw)
To: Hans de Goede
Cc: Jean Delvare, Wolfram Sang, linux-i2c, Serge Semin,
Andy Shevchenko, Mika Westerberg
On Mon, Dec 21, 2020 at 2:42 PM Hans de Goede <hdegoede@redhat.com> wrote:
> gpiod_add_lookup_table() expects the gpiod_lookup_table->table passed to
> it to be terminated with a zero-ed out entry.
>
> So we need to allocate one more entry then we will use.
>
> Cc: Serge Semin <fancer.lancer@gmail.com>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Andy Shevchenko <andy@infradead.org>
> Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
> Fixes: d308dfbf62ef ("i2c: mux/i801: Switch to use descriptor passing")
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] i2c: i801: Fix the i2c-mux gpiod_lookup_table not being properly terminated
2020-12-21 13:42 [PATCH] i2c: i801: Fix the i2c-mux gpiod_lookup_table not being properly terminated Hans de Goede
` (2 preceding siblings ...)
2020-12-27 22:41 ` Linus Walleij
@ 2021-01-04 18:26 ` Wolfram Sang
3 siblings, 0 replies; 5+ messages in thread
From: Wolfram Sang @ 2021-01-04 18:26 UTC (permalink / raw)
To: Hans de Goede
Cc: Jean Delvare, linux-i2c, Serge Semin, Linus Walleij,
Andy Shevchenko, Mika Westerberg
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On Mon, Dec 21, 2020 at 02:42:25PM +0100, Hans de Goede wrote:
> gpiod_add_lookup_table() expects the gpiod_lookup_table->table passed to
> it to be terminated with a zero-ed out entry.
>
> So we need to allocate one more entry then we will use.
>
> Cc: Serge Semin <fancer.lancer@gmail.com>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Andy Shevchenko <andy@infradead.org>
> Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
> Fixes: d308dfbf62ef ("i2c: mux/i801: Switch to use descriptor passing")
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Applied to for-current, thanks!
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2020-12-21 13:42 [PATCH] i2c: i801: Fix the i2c-mux gpiod_lookup_table not being properly terminated Hans de Goede
2020-12-21 13:55 ` Mika Westerberg
2020-12-21 15:12 ` Jean Delvare
2020-12-27 22:41 ` Linus Walleij
2021-01-04 18:26 ` Wolfram Sang
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