Hi,
On Thu, Jul 19, 2012 at 05:15:57PM +0530, Ajay Kumar Gupta wrote:
> diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
> index 89d1871..3e09984 100644
> --- a/drivers/usb/musb/musb_core.c
> +++ b/drivers/usb/musb/musb_core.c
> @@ -99,6 +99,7 @@
> #include <linux/prefetch.h>
> #include <linux/platform_device.h>
> #include <linux/io.h>
> +#include <linux/idr.h>
>
> #include "musb_core.h"
>
> @@ -114,6 +115,7 @@
>
> #define MUSB_DRIVER_NAME "musb-hdrc"
> const char musb_driver_name[] = MUSB_DRIVER_NAME;
> +static DEFINE_IDA(musb_ida);
>
> MODULE_DESCRIPTION(DRIVER_INFO);
> MODULE_AUTHOR(DRIVER_AUTHOR);
> @@ -130,6 +132,33 @@ static inline struct musb *dev_to_musb(struct device *dev)
>
> /*-------------------------------------------------------------------------*/
>
> +int musb_get_id(struct device *dev, gfp_t gfp_mask)
> +{
> + int ret;
> + int id;
> +
> + ret = ida_pre_get(&musb_ida, gfp_mask);
> + if (!ret) {
> + dev_err(dev, "failed to reserve resource for id\n");
> + return -ENOMEM;
> + }
> +
> + ret = ida_get_new(&musb_ida, &id);
> + if (ret < 0) {
> + dev_err(dev, "failed to allocate a new id\n");
> + return ret;
> + }
> +
> + return id;
> +}
> +
> +void musb_put_id(struct device *dev, int id)
> +{
> +
> + dev_dbg(dev, "removing id %d\n", id);
> + ida_remove(&musb_ida, id);
> +}
both of these should be EXPORT_SYMBOL_GPL() for cases when musb and glue
are compiled as modules.
--
balbi
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