linux-kernel - [PATCH v4 04/15] platform/x86: i2c-multi-instantiate: Accept errors of i2c_acpi_new

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Message-Id: <20181128113024.42126-5-andriy.shevchenko@linux.intel.com>
Date:   Wed, 28 Nov 2018 13:30:13 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Darren Hart <dvhart@...radead.org>,
        platform-driver-x86@...r.kernel.org,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        linux-acpi@...r.kernel.org, Jonathan Cameron <jic23@...nel.org>,
        Wolfram Sang <wsa@...-dreams.de>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-i2c@...r.kernel.org, Hans de Goede <hdegoede@...hat.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v4 04/15] platform/x86: i2c-multi-instantiate: Accept errors of i2c_acpi_new_device()

In the future i2c_acpi_new_device() will return error pointer in some cases.
Prepare i2c-multi-instantiate driver to support that.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@...hat.com>
---
 drivers/platform/x86/i2c-multi-instantiate.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/i2c-multi-instantiate.c b/drivers/platform/x86/i2c-multi-instantiate.c
index 5456581b473c..16a0eabe1e31 100644
--- a/drivers/platform/x86/i2c-multi-instantiate.c
+++ b/drivers/platform/x86/i2c-multi-instantiate.c
@@ -72,9 +72,14 @@ static int i2c_multi_inst_probe(struct platform_device *pdev)
 			board_info.irq = ret;
 		}
 		multi->clients[i] = i2c_acpi_new_device(dev, i, &board_info);
-		if (!multi->clients[i]) {
+		if (IS_ERR(multi->clients[i]))
+			ret = PTR_ERR(multi->clients[i]);
+		else if (!multi->clients[i])
+			ret = -EPROBE_DEFER; /* Wait for i2c-adapter to load */
+		else
+			ret = 0;
+		if (ret) {
 			dev_err(dev, "Error creating i2c-client, idx %d\n", i);
-			ret = -ENODEV;
 			goto error;
 		}
 	}
-- 
2.19.2