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| author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2011-10-31 00:48:00 -0700 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2011-12-12 11:45:07 +0200 |
| commit | ab14230854aba9d0c99b3cd0e4bb1ef430973d84 (patch) | |
| tree | f4c598256c6b61404883bfeda2aa5c66ff76866b /drivers/usb/renesas_usbhs | |
| parent | c5b963f809f378d4fedd6f2f09b36f50c5a37bd5 (diff) | |
| download | linux-stable-ab14230854aba9d0c99b3cd0e4bb1ef430973d84.tar.gz linux-stable-ab14230854aba9d0c99b3cd0e4bb1ef430973d84.tar.bz2 linux-stable-ab14230854aba9d0c99b3cd0e4bb1ef430973d84.zip | |
usb: gadget: renesas_usbhs: check device0 status when alloc
device0 was treated without checking in usbhsh_device_alloc().
but "udev->usbv" and "dev_set_drvdata()" will be overwritten
if device0 was multi-allocated.
This patch fixes this issue.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/renesas_usbhs')
| -rw-r--r-- | drivers/usb/renesas_usbhs/mod_host.c | 36 |
1 files changed, 22 insertions, 14 deletions
diff --git a/drivers/usb/renesas_usbhs/mod_host.c b/drivers/usb/renesas_usbhs/mod_host.c index 3f1eaf15e0ba..e6fd044adfa3 100644 --- a/drivers/usb/renesas_usbhs/mod_host.c +++ b/drivers/usb/renesas_usbhs/mod_host.c @@ -153,6 +153,7 @@ static const char usbhsh_hcd_name[] = "renesas_usbhs host"; #define usbhsh_usbv_to_udev(d) dev_get_drvdata(&(d)->dev) #define usbhsh_udev_to_usbv(h) ((h)->usbv) +#define usbhsh_udev_is_used(h) usbhsh_udev_to_usbv(h) #define usbhsh_pipe_info(p) ((p)->mod_private) @@ -231,27 +232,34 @@ static struct usbhsh_device *usbhsh_device_alloc(struct usbhsh_hpriv *hpriv, int i; /* - * device 0 + * find device */ if (0 == usb_pipedevice(urb->pipe)) { + /* + * device0 is special case + */ udev = usbhsh_device0(hpriv); - goto usbhsh_device_find; - } + if (usbhsh_udev_is_used(udev)) + udev = NULL; + } else { + struct usbhsh_device *pos; - /* - * find unused device - */ - usbhsh_for_each_udev(udev, hpriv, i) { - if (usbhsh_udev_to_usbv(udev)) - continue; - goto usbhsh_device_find; + /* + * find unused device + */ + usbhsh_for_each_udev(pos, hpriv, i) { + if (usbhsh_udev_is_used(pos)) + continue; + udev = pos; + break; + } } - dev_err(dev, "no free usbhsh_device\n"); - - return NULL; + if (!udev) { + dev_err(dev, "no free usbhsh_device\n"); + return NULL; + } -usbhsh_device_find: if (usbhsh_device_has_endpoint(udev)) dev_warn(dev, "udev have old endpoint\n"); |