lkml.org 
[lkml]   [2021]   [Dec]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH v3 4/5] Docs: usb: update explanation for device_present to disconnected
Update text for `device_present` flag to `disconnected` flag

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
---
V1 -> V2: Corrected format of function name to skel_disconnect()
V2 -> V3: Moved correction of the function name to an own patch in this
patch series
---
.../driver-api/usb/writing_usb_driver.rst | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/Documentation/driver-api/usb/writing_usb_driver.rst b/Documentation/driver-api/usb/writing_usb_driver.rst
index 6c487ac5eab2..1968cf5c55f6 100644
--- a/Documentation/driver-api/usb/writing_usb_driver.rst
+++ b/Documentation/driver-api/usb/writing_usb_driver.rst
@@ -278,15 +278,13 @@ this::
}


-If a program currently has an open handle to the device, we reset the
-flag ``device_present``. For every read, write, release and other
+If the driver probed the device successfully, the flag ``disconnected``
+is initialized and set to false. For every read, write and other
functions that expect a device to be present, the driver first checks
-this flag to see if the device is still present. If not, it releases
-that the device has disappeared, and a ``-ENODEV`` error is returned to the
-user-space program. When the release function is eventually called, it
-determines if there is no device and if not, it does the cleanup that
-the ``skel_disconnect`` function normally does if there are no open files
-on the device (see Listing 5).
+this flag to see if the device is still present. If not, a ``-ENODEV``
+error is returned to the user-space program. When the device is
+disconnected, the ``skel_disconnect`` function is called. It sets
+``disconnected`` to true and cleans up.

Isochronous Data
================
--
2.25.1
\
 
 \ /
  Last update: 2021-12-06 21:58    [W:0.085 / U:0.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site