mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-30 02:29:01 +00:00
f07e572f64
bcm2708: boot tested on RPi B+ v1.2 bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G bcm2710: boot tested on RPi 3B v1.2 bcm2711: boot tested on RPi 4B v1.1 4G Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
47 lines
1.4 KiB
Diff
47 lines
1.4 KiB
Diff
From bc55eb17b46668e70dfbd1a091159935d8f95eb9 Mon Sep 17 00:00:00 2001
|
|
From: Joerg Schambacher <joerg@i2audio.com>
|
|
Date: Fri, 16 Oct 2020 15:17:07 +0200
|
|
Subject: [PATCH] Fixes a problem when module probes before i2c
|
|
module is available
|
|
|
|
The driver crashed while a NULL pointer returned by i2c_get_adapter()
|
|
has been used to access the i2c bus functions.
|
|
The headphone probing function hb_hp_probe() now returns -EPROBE_DEFER
|
|
in case the i2c module has not been loaded yet.
|
|
|
|
Signed-off-by: Joerg Schambacher <joerg@i2audio.com>
|
|
---
|
|
sound/soc/bcm/hifiberry_dacplus.c | 9 +++++++--
|
|
1 file changed, 7 insertions(+), 2 deletions(-)
|
|
|
|
--- a/sound/soc/bcm/hifiberry_dacplus.c
|
|
+++ b/sound/soc/bcm/hifiberry_dacplus.c
|
|
@@ -315,12 +315,14 @@ static int hb_hp_detect(void)
|
|
{
|
|
struct i2c_adapter *adap = i2c_get_adapter(1);
|
|
int ret;
|
|
-
|
|
struct i2c_client tpa_i2c_client = {
|
|
.addr = 0x60,
|
|
.adapter = adap,
|
|
};
|
|
|
|
+ if (!adap)
|
|
+ return -EPROBE_DEFER; /* I2C module not yet available */
|
|
+
|
|
ret = i2c_smbus_read_byte(&tpa_i2c_client) >= 0;
|
|
i2c_put_adapter(adap);
|
|
return ret;
|
|
@@ -342,7 +344,10 @@ static int snd_rpi_hifiberry_dacplus_pro
|
|
struct of_changeset ocs;
|
|
|
|
/* probe for head phone amp */
|
|
- if (hb_hp_detect()) {
|
|
+ ret = hb_hp_detect();
|
|
+ if (ret < 0)
|
|
+ return ret;
|
|
+ if (ret) {
|
|
card->aux_dev = hifiberry_dacplus_aux_devs;
|
|
card->num_aux_devs =
|
|
ARRAY_SIZE(hifiberry_dacplus_aux_devs);
|