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ARM: davinci: da8xx: fix oops in USB PHY driver due to stack allocated platform_data 

This fixes a possible kernel oops due to using stack allocated platform
data for the USB PHY driver on DA8XX devices. If the platform device
probe is deferred, then we get a corrupt pointer for the platform data.

We now use a global static struct for the platform data so that the
platform data pointer does not get written over.

Fixes: bdec5a6b57 ("ARM: da8xx: use platform data for CFGCHIP syscon regmap")
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This commit is contained in:
David Lechner 2018-03-15 14:17:20 -05:00 committed by Sekhar Nori
parent 96c081735d
commit 3424a516d9
1 changed files with 4 additions and 4 deletions
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8
arch/arm/mach-davinci/usb-da8xx.c
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@ -26,6 +26,8 @@
static struct clk *usb20_clk;
static struct da8xx_usb_phy_platform_data da8xx_usb_phy_pdata;
static struct platform_device da8xx_usb_phy = {
.name = "da8xx-usb-phy",
.id = -1,
@ -36,15 +38,13 @@ static struct platform_device da8xx_usb_phy = {
* registered yet.
*/
.init_name = "da8xx-usb-phy",
.platform_data = &da8xx_usb_phy_pdata,
},
};
int __init da8xx_register_usb_phy(void)
{
struct da8xx_usb_phy_platform_data pdata;
pdata.cfgchip = da8xx_get_cfgchip();
da8xx_usb_phy.dev.platform_data = &pdata;
da8xx_usb_phy_pdata.cfgchip = da8xx_get_cfgchip();
return platform_device_register(&da8xx_usb_phy);
}