firmware: raspberrypi: Use dev_err_probe() to simplify code

In the probe path, dev_err() can be replaced with dev_err_probe()
which will check if error code is -EPROBE_DEFER and prints the
error name. It also sets the defer probe reason which can be
checked later through debugfs.

Signed-off-by: Yuan Can <yuancan@huawei.com>
Link: https://lore.kernel.org/r/20220924025041.29389-1-yuancan@huawei.com
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

diff --git a/drivers/firmware/raspberrypi.c b/drivers/firmware/raspberrypi.c
index 4b8978b..a9d7aaf 100644 (file)
--- a/drivers/firmware/raspberrypi.c
+++ b/drivers/firmware/raspberrypi.c
@@ -268,12 +268,9 @@ static int rpi_firmware_probe(struct platform_device *pdev)
        fw->cl.tx_block = true;
 
        fw->chan = mbox_request_channel(&fw->cl, 0);
-       if (IS_ERR(fw->chan)) {
-               int ret = PTR_ERR(fw->chan);
-               if (ret != -EPROBE_DEFER)
-                       dev_err(dev, "Failed to get mbox channel: %d\n", ret);
-               return ret;
-       }
+       if (IS_ERR(fw->chan))
+               return dev_err_probe(dev, PTR_ERR(fw->chan),
+                                    "Failed to get mbox channel\n");
 
        init_completion(&fw->c);
        kref_init(&fw->consumers);