[PATCH v2 3/4] Docs: usb: update comment and code of function skel_delete
From: Philipp Hortmann <hidden>
Date: 2021-12-04 16:35:33
Also in:
linux-usb, lkml
Subsystem:
documentation, the rest · Maintainers:
Jonathan Corbet, Linus Torvalds
Put skel_delete function in the document typical form Update code according to usb-skeleton.c Signed-off-by: Philipp Hortmann <redacted> --- V1 -> V2: Corrected format of function name to skel_delete() --- .../driver-api/usb/writing_usb_driver.rst | 21 +++++++++---------- 1 file changed, 10 insertions(+), 11 deletions(-)
diff --git a/Documentation/driver-api/usb/writing_usb_driver.rst b/Documentation/driver-api/usb/writing_usb_driver.rst
index 297b622f5438..b459f9e089e0 100644
--- a/Documentation/driver-api/usb/writing_usb_driver.rst
+++ b/Documentation/driver-api/usb/writing_usb_driver.rst@@ -262,19 +262,18 @@ One of the more difficult problems that USB drivers must be able to handle smoothly is the fact that the USB device may be removed from the system at any point in time, even if a program is currently talking to it. It needs to be able to shut down any current reads and writes and -notify the user-space programs that the device is no longer there. The -following code (function ``skel_delete``) is an example of how to do -this:: +notify the user-space programs that the device is no longer there. +skel_delete() is an example of how to do this:: - static inline void skel_delete (struct usb_skel *dev) + static void skel_delete(struct kref *kref) { - kfree (dev->bulk_in_buffer); - if (dev->bulk_out_buffer != NULL) - usb_free_coherent (dev->udev, dev->bulk_out_size, - dev->bulk_out_buffer, - dev->write_urb->transfer_dma); - usb_free_urb (dev->write_urb); - kfree (dev); + struct usb_skel *dev = to_skel_dev(kref); + + usb_free_urb(dev->bulk_in_urb); + usb_put_intf(dev->interface); + usb_put_dev(dev->udev); + kfree(dev->bulk_in_buffer); + kfree(dev); }
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2.25.1