diff options
| author | Takashi Iwai <tiwai@suse.de> | 2017-10-04 16:15:59 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-22 09:10:05 +0200 |
| commit | 5547c12c47d01ac44009cc814d2b94cabe6a3cea (patch) | |
| tree | a034208e96e125ff5c2fddd7b4af4539032c23d4 /include | |
| parent | 2c9ade661a5e1ff9b333b483494c50dca5ce5587 (diff) | |
usb: core: Add a helper function to check the validity of EP type in URB
commit e901b9873876ca30a09253731bd3a6b00c44b5b0 upstream.
This patch adds a new helper function to perform a sanity check of the
given URB to see whether it contains a valid endpoint. It's a light-
weight version of what usb_submit_urb() does, but without the kernel
warning followed by the stack trace, just returns an error code.
Especially for a driver that doesn't parse the descriptor but fills
the URB with the fixed endpoint (e.g. some quirks for non-compliant
devices), this kind of check is preferable at the probe phase before
actually submitting the urb.
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/usb.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h index 02bffcc611c3..55ea5d625cdf 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -1655,6 +1655,8 @@ static inline int usb_urb_dir_out(struct urb *urb) return (urb->transfer_flags & URB_DIR_MASK) == URB_DIR_OUT; } +int usb_urb_ep_type_check(const struct urb *urb); + void *usb_alloc_coherent(struct usb_device *dev, size_t size, gfp_t mem_flags, dma_addr_t *dma); void usb_free_coherent(struct usb_device *dev, size_t size, |