[PATCH 5.10 117/121] i2c: qcom-cci: dont delete an unregistered adapter

Greg Kroah-Hartman
2022-02-21T09:16:24Z

From: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>

commit a0d48505a1d68e27220369e2dd1e3573a2f362d2 upstream.

If i2c_add_adapter() fails to add an I2C adapter found on QCOM CCI
controller, on error path i2c_del_adapter() is still called.

Fortunately there is a sanity check in the I2C core, so the only
visible implication is a printed debug level message:

i2c-core: attempting to delete unregistered adapter [Qualcomm-CCI]

Nevertheless it would be reasonable to correct the probe error path.

Fixes: e517526195de ("i2c: Add Qualcomm CCI I2C driver")
Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/i2c/busses/i2c-qcom-cci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/i2c/busses/i2c-qcom-cci.c
+++ b/drivers/i2c/busses/i2c-qcom-cci.c
@@ -655,7 +655,7 @@ static int cci_probe(struct platform_dev
return 0;

error_i2c:
- for (; i >= 0; i--) {
+ for (--i ; i >= 0; i--) {
if (cci->master[i].cci)
i2c_del_adapter(&cci->master[i].adap);
}