This is a note to let you know that I've just added the patch titled
i2c: qcom-cci: Fix ordering of pm_runtime_xx and i2c_add_adapter
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
i2c-qcom-cci-fix-ordering-of-pm_runtime_xx-and-i2c_add_adapter.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 61775d54d674ff8ec3658495e0dbc537227dc5c1 Mon Sep 17 00:00:00 2001
From: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
Date: Tue, 18 Oct 2022 03:19:20 +0100
Subject: i2c: qcom-cci: Fix ordering of pm_runtime_xx and i2c_add_adapter
From: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
commit 61775d54d674ff8ec3658495e0dbc537227dc5c1 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: e517526195de ("i2c: Add Qualcomm CCI I2C driver")
Reported-by: Vladimir Zapolskiy <vladimir.zapolskiy@xxxxxxxxxx>
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@xxxxxxxxxx>
Tested-by: Vladimir Zapolskiy <vladimir.zapolskiy@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
Reviewed-by: Robert Foss <robert.foss@xxxxxxxxxx>
Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-qcom-cci.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
--- a/drivers/i2c/busses/i2c-qcom-cci.c
+++ b/drivers/i2c/busses/i2c-qcom-cci.c
@@ -638,6 +638,11 @@ static int cci_probe(struct platform_dev
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_dev
}
}
- 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);
Patches currently in stable-queue which might be from bryan.odonoghue@xxxxxxxxxx are
queue-5.10/media-venus-dec-handle-the-case-where-find_format-fails.patch
queue-5.10/i2c-qcom-cci-fix-ordering-of-pm_runtime_xx-and-i2c_add_adapter.patch
