On 4/24/24 5:59 AM, quic_zijuhu wrote:
> On 4/24/2024 8:29 PM, Bartosz Golaszewski wrote:
>> From: Bartosz Golaszewski <[email protected]>
>>
>> Any return value from gpiod_get_optional() other than a pointer to a
>> GPIO descriptor or a NULL-pointer is an error and the driver should
>> abort probing. That being said: commit 56d074d26c58 ("Bluetooth: hci_qca:
>> don't use IS_ERR_OR_NULL() with gpiod_get_optional()") no longer sets
>> power_ctrl_enabled on NULL-pointer returned by
>> devm_gpiod_get_optional(). Restore this behavior but bail-out on errors.
>> While at it: also bail-out on error returned when trying to get the
>> "swctrl" GPIO.
>>
>> Reported-by: Wren Turkal <[email protected]>
>> Reported-by: Zijun Hu <[email protected]>
>> Closes: https://lore.kernel.org/linux-bluetooth/[email protected]/
>> Fixes: 56d074d26c58 ("Bluetooth: hci_qca: don't use IS_ERR_OR_NULL() with gpiod_get_optional()")
>> Reviewed-by: Krzysztof Kozlowski <[email protected]>
> is it really reviewed-by Krzysztof?
> suggest reviewer give explicit review-by tag by public way, then you add
> this tag.
>> Signed-off-by: Bartosz Golaszewski <[email protected]>
>> ---
>> v1 -> v2:
>> - also restore the previous behavior for QCA6390 and other models that
>> fall under the default: label in the affected switch case
>> - bail-out on errors when getting the swctrl GPIO too
>>
>> drivers/bluetooth/hci_qca.c | 18 +++++++++++++-----
>> 1 file changed, 13 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
>> index 92fa20f5ac7d..0e98ad2c0c9d 100644
>> --- a/drivers/bluetooth/hci_qca.c
>> +++ b/drivers/bluetooth/hci_qca.c
>> @@ -2327,16 +2327,21 @@ static int qca_serdev_probe(struct serdev_device *serdev)
>> (data->soc_type == QCA_WCN6750 ||
>> data->soc_type == QCA_WCN6855)) {
>> dev_err(&serdev->dev, "failed to acquire BT_EN gpio\n");
>> - power_ctrl_enabled = false;
>> +
> think about what will happen for present lunched products if this type
> error really happens.
> BT don't work at all with your change. BT can be used mostly without
> your change.
> return PTR_ERR(qcadev->bt_en);
>> }
>>
>> + if (!qcadev->bt_en)
>> + power_ctrl_enabled = false;
>> +
> you don't answer me how to treat a required enable is not configured by user
>> qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl",
>> GPIOD_IN);
>> if (IS_ERR(qcadev->sw_ctrl) &&
>> (data->soc_type == QCA_WCN6750 ||
>> data->soc_type == QCA_WCN6855 ||
>> - data->soc_type == QCA_WCN7850))
>> - dev_warn(&serdev->dev, "failed to acquire SW_CTRL gpio\n");
>> + data->soc_type == QCA_WCN7850)) {
>> + dev_err(&serdev->dev, "failed to acquire SW_CTRL gpio\n");
>> + return PTR_ERR(qcadev->sw_ctrl);have the same question as above.
>> + }
>>
>> qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
>> if (IS_ERR(qcadev->susclk)) {
>> @@ -2355,10 +2360,13 @@ static int qca_serdev_probe(struct serdev_device *serdev)
>> qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
>> GPIOD_OUT_LOW);
>> if (IS_ERR(qcadev->bt_en)) {
>> - dev_warn(&serdev->dev, "failed to acquire enable gpio\n");
>> - power_ctrl_enabled = false;
>> + dev_err(&serdev->dev, "failed to acquire enable gpio\n");
>> + return PTR_ERR(qcadev->bt_en);
>> }
>>
> have the same question as above.
> is it right for such prompt ?
>> + if (!qcadev->bt_en)
>> + power_ctrl_enabled = false;
>> +
>> qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
>> if (IS_ERR(qcadev->susclk)) {
>> dev_warn(&serdev->dev, "failed to acquire clk\n");
> have the same question as above.
>
> how do you known the root cause of the issue reported without my earlier
> debugging and fix?
Without your debugging, this fix would not have been possible.
>
> do my fix regarding the issue i concerned have any fault?
>
> NAK by me.
>
>
>
>
--
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