diff options
| author | Kuen-Han Tsai <khtsai@google.com> | 2025-09-16 16:21:33 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-17 12:44:53 +0200 |
| commit | 201c53c687f2b55a7cc6d9f4000af4797860174b (patch) | |
| tree | b22ab3c8f1f90eba19a5c29576da3a7b84069573 /include/linux/usb | |
| parent | bfb1d99d969fe3b892db30848aeebfa19d21f57f (diff) | |
usb: gadget: Introduce free_usb_request helper
Introduce the free_usb_request() function that frees both the request's
buffer and the request itself.
This function serves as the cleanup callback for DEFINE_FREE() to enable
automatic, scope-based cleanup for usb_request pointers.
Signed-off-by: Kuen-Han Tsai <khtsai@google.com>
Link: https://lore.kernel.org/r/20250916-ready-v1-2-4997bf277548@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20250916-ready-v1-2-4997bf277548@google.com
Diffstat (limited to 'include/linux/usb')
| -rw-r--r-- | include/linux/usb/gadget.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 0f2079476088..3aaf19e77558 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -15,6 +15,7 @@ #ifndef __LINUX_USB_GADGET_H #define __LINUX_USB_GADGET_H +#include <linux/cleanup.h> #include <linux/configfs.h> #include <linux/device.h> #include <linux/errno.h> @@ -293,6 +294,28 @@ static inline void usb_ep_fifo_flush(struct usb_ep *ep) /*-------------------------------------------------------------------------*/ +/** + * free_usb_request - frees a usb_request object and its buffer + * @req: the request being freed + * + * This helper function frees both the request's buffer and the request object + * itself by calling usb_ep_free_request(). Its signature is designed to be used + * with DEFINE_FREE() to enable automatic, scope-based cleanup for usb_request + * pointers. + */ +static inline void free_usb_request(struct usb_request *req) +{ + if (!req) + return; + + kfree(req->buf); + usb_ep_free_request(req->ep, req); +} + +DEFINE_FREE(free_usb_request, struct usb_request *, free_usb_request(_T)) + +/*-------------------------------------------------------------------------*/ + struct usb_dcd_config_params { __u8 bU1devExitLat; /* U1 Device exit Latency */ #define USB_DEFAULT_U1_DEV_EXIT_LAT 0x01 /* Less then 1 microsec */ |