usb: ehci-sh: fix illegal phy_init() running when platform_data is NULL

If the platform_data is not set, pdata will be uninitialized value.
Since the driver has the following code, if the condition is true when
the pdata is uninitialized value, the driver may jump to the illegal
phy_init().

	if (pdata && pdata->phy_init)
		pdata->phy_init();

This patch also fixes the following warning:

  CC      drivers/usb/host/ehci-hcd.o
drivers/usb/host/ehci-sh.c: In function ‘ehci_hcd_sh_probe’:
drivers/usb/host/ehci-sh.c:104: warning: ‘pdata’ may be used uninitialized in this function

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/ehci-sh.c b/drivers/usb/host/ehci-sh.c
index ca819cdd0c5ecb895929ae2fbf7a6a7f2b3664bc..e7cb3925abf8e0276dc4c119e8e03116d0ea48bd 100644 (file)
--- a/drivers/usb/host/ehci-sh.c
+++ b/drivers/usb/host/ehci-sh.c
@@ -126,8 +126,7 @@ static int ehci_hcd_sh_probe(struct platform_device *pdev)
                goto fail_create_hcd;
        }
 
-       if (pdev->dev.platform_data != NULL)
-               pdata = pdev->dev.platform_data;
+       pdata = pdev->dev.platform_data;
 
        /* initialize hcd */
        hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,