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| author | Vadym Kochan <vadym.kochan@plvision.eu> | 2020-08-31 04:55:39 +0300 |
|---|---|---|
| committer | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2020-09-01 09:49:55 +0200 |
| commit | 45df80d7605c25055a85fbc5a8446c81c6c0ca24 (patch) | |
| tree | 729a9d31b216fab6d1c06eaa97387a2e5da4477c /drivers/misc/eeprom | |
| parent | 9123e3a74ec7b934a4a099e98af6a61c2f80bbf5 (diff) | |
| download | linux-45df80d7605c25055a85fbc5a8446c81c6c0ca24.tar.gz | |
misc: eeprom: at24: register nvmem only after eeprom is ready to use
During nvmem_register() the nvmem core sends notifications when:
- cell added
- nvmem added
and during these notifications some callback func may access the nvmem
device, which will fail in case of at24 eeprom because regulator and pm
are enabled after nvmem_register().
Fixes: cd5676db0574 ("misc: eeprom: at24: support pm_runtime control")
Fixes: b20eb4c1f026 ("eeprom: at24: drop unnecessary label")
Cc: stable@vger.kernel.org
Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Diffstat (limited to 'drivers/misc/eeprom')
| -rw-r--r-- | drivers/misc/eeprom/at24.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index 2591c21b2b5d8..26a23abc053d2 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -692,10 +692,6 @@ static int at24_probe(struct i2c_client *client) nvmem_config.word_size = 1; nvmem_config.size = byte_len; - at24->nvmem = devm_nvmem_register(dev, &nvmem_config); - if (IS_ERR(at24->nvmem)) - return PTR_ERR(at24->nvmem); - i2c_set_clientdata(client, at24); err = regulator_enable(at24->vcc_reg); @@ -708,6 +704,13 @@ static int at24_probe(struct i2c_client *client) pm_runtime_set_active(dev); pm_runtime_enable(dev); + at24->nvmem = devm_nvmem_register(dev, &nvmem_config); + if (IS_ERR(at24->nvmem)) { + pm_runtime_disable(dev); + regulator_disable(at24->vcc_reg); + return PTR_ERR(at24->nvmem); + } + /* * Perform a one-byte test read to verify that the * chip is functional. |