usb: chipidea: allow multiple instances to use default ci_default_pdata

Currently, ci_default_pdata is common to all instances of the driver and
gets modified by the core driver code. This is bad if there are multiple
instances of the device with different settings such as the phy type. Fix
this by making a copy of the default platform_data.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Peter Chen <Peter.Chen@freescale.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/chipidea/ci_hdrc_usb2.c b/drivers/usb/chipidea/ci_hdrc_usb2.c
index 45844c951788c99d71c6cfa01ed9669816efec78..9eae1a16cef9c7aa7f7aa8eaec602af7e75a46cd 100644 (file)
--- a/drivers/usb/chipidea/ci_hdrc_usb2.c
+++ b/drivers/usb/chipidea/ci_hdrc_usb2.c
@@ -25,7 +25,7 @@ struct ci_hdrc_usb2_priv {
        struct clk              *clk;
 };
 
-static struct ci_hdrc_platform_data ci_default_pdata = {
+static const struct ci_hdrc_platform_data ci_default_pdata = {
        .capoffset      = DEF_CAPOFFSET,
        .flags          = CI_HDRC_DISABLE_STREAMING,
 };
@@ -37,8 +37,10 @@ static int ci_hdrc_usb2_probe(struct platform_device *pdev)
        struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
        int ret;
 
-       if (!ci_pdata)
-               ci_pdata = &ci_default_pdata;
+       if (!ci_pdata) {
+               ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
+               *ci_pdata = ci_default_pdata;   /* struct copy */
+       }
 
        priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
        if (!priv)