diff options
| author | Oliver Neukum <oneukum@suse.com> | 2020-04-15 17:13:58 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-16 14:59:49 +0200 |
| commit | a4e7279cd1d19f48f0af2a10ed020febaa9ac092 (patch) | |
| tree | 65428b3d49db48728196062210138b0b36499717 /drivers/usb/class/cdc-acm.h | |
| parent | 0afccd7601514c4b83d8cc58c740089cc447051d (diff) | |
cdc-acm: introduce a cool down
Immediate submission in case of a babbling device can lead
to a busy loop. Introducing a delayed work.
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Cc: stable <stable@vger.kernel.org>
Tested-by: Jonas Karlsson <jonas.karlsson@actia.se>
Link: https://lore.kernel.org/r/20200415151358.32664-2-oneukum@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/class/cdc-acm.h')
| -rw-r--r-- | drivers/usb/class/cdc-acm.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h index ca1c026382c2..cd5e9d8ab237 100644 --- a/drivers/usb/class/cdc-acm.h +++ b/drivers/usb/class/cdc-acm.h @@ -109,8 +109,11 @@ struct acm { # define EVENT_TTY_WAKEUP 0 # define EVENT_RX_STALL 1 # define ACM_THROTTLED 2 +# define ACM_ERROR_DELAY 3 + unsigned long urbs_in_error_delay; /* these need to be restarted after a delay */ struct usb_cdc_line_coding line; /* bits, stop, parity */ - struct work_struct work; /* work queue entry for line discipline waking up */ + struct work_struct work; /* work queue entry for various purposes*/ + struct delayed_work dwork; /* for cool downs needed in error recovery */ unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */ unsigned int ctrlout; /* output control lines (DTR, RTS) */ struct async_icount iocount; /* counters for control line changes */ |