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| author | Kuen-Han Tsai <khtsai@google.com> | 2025-10-18 04:22:15 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-10-29 16:04:31 +0300 |
| commit | 9a190827320548314ae42d05e1275a804bbced33 (patch) | |
| tree | 1c2de4735b3db30a4e2449dfd5811e11adc79387 /include/linux | |
| parent | 29d9a51782d18a83a333fd605d70c11b36b0291a (diff) | |
| download | linux-9a190827320548314ae42d05e1275a804bbced33.tar.xz | |
usb: gadget: Store endpoint pointer in usb_request
[ Upstream commit bfb1d99d969fe3b892db30848aeebfa19d21f57f ]
Gadget function drivers often have goto-based error handling in their
bind paths, which can be bug-prone. Refactoring these paths to use
__free() scope-based cleanup is desirable, but currently blocked.
The blocker is that usb_ep_free_request(ep, req) requires two
parameters, while the __free() mechanism can only pass a pointer to the
request itself.
Store an endpoint pointer in the struct usb_request. The pointer is
populated centrally in usb_ep_alloc_request() on every successful
allocation, making the request object self-contained.
Signed-off-by: Kuen-Han Tsai <khtsai@google.com>
Link: https://lore.kernel.org/r/20250916-ready-v1-1-4997bf277548@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20250916-ready-v1-1-4997bf277548@google.com
Stable-dep-of: 75a5b8d4ddd4 ("usb: gadget: f_ncm: Refactor bind path to use __free()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/usb/gadget.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 705b76f8dddb..9a4d800cdc1e 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -31,6 +31,7 @@ struct usb_ep; /** * struct usb_request - describes one i/o request + * @ep: The associated endpoint set by usb_ep_alloc_request(). * @buf: Buffer used for data. Always provide this; some controllers * only use PIO, or don't use DMA for some endpoints. * @dma: DMA address corresponding to 'buf'. If you don't set this @@ -96,6 +97,7 @@ struct usb_ep; */ struct usb_request { + struct usb_ep *ep; void *buf; unsigned length; dma_addr_t dma; |