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i2c: qcom-cci: Fix ordering of pm_runtime_xx and i2c_add_adapter 

commit 61775d54d6 upstream.

When we compile-in the CCI along with the imx412 driver and run on the RB5
we see that i2c_add_adapter() causes the probe of the imx412 driver to
happen.

This probe tries to perform an i2c xfer() and the xfer() in i2c-qcom-cci.c
fails on pm_runtime_get() because the i2c-qcom-cci.c::probe() function has
not completed to pm_runtime_enable(dev).

Fix this sequence by ensuring pm_runtime_xxx() calls happen prior to adding
the i2c adapter.

Fixes: e517526195 ("i2c: Add Qualcomm CCI I2C driver")
Reported-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Tested-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bryan O'Donoghue 2022-10-18 03:19:20 +01:00 committed by Greg Kroah-Hartman
parent 14d260f94f
commit 93d7e2b47a
1 changed files with 8 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/i2c/busses/i2c-qcom-cci.c
View File

@ -638,6 +638,11 @@ static int cci_probe(struct platform_device *pdev)
if (ret < 0)
goto error;
pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC);
pm_runtime_use_autosuspend(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
for (i = 0; i < cci->data->num_masters; i++) {
if (!cci->master[i].cci)
continue;
@ -649,14 +654,12 @@ static int cci_probe(struct platform_device *pdev)
}
}
pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC);
pm_runtime_use_autosuspend(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
return 0;
error_i2c:
pm_runtime_disable(dev);
pm_runtime_dont_use_autosuspend(dev);
for (--i ; i >= 0; i--) {
if (cci->master[i].cci) {
i2c_del_adapter(&cci->master[i].adap);