If a USB serial device (e.g. /dev/ttyUSB0) with an active program is
unplugged, a bunch of -ENODEV and -EPROTO errors may be produced in the
logs. This patch set quiets these messages without changing the
original behavior.
This change is beneficial when using daemons such as slcand, which is
similar to pppd or slip, that cannot determine whether they should exit
until after the USB serial device is unplugged. Producing these error
messages for a normal use case is not helpful.
Changes in v3:
- change "will spam" to "might spam" since it is dependent
upon what host controller and devices are used.
- fix subject: it is silencing all errors, not just one as in
previous versions.
Changes in v2:
- Instead of handling -EPROTO specially, use dev_dbg instead of
dev_err like other drivers do.
Jeremiah Mahler (2):
usb: serial: silence all non-critical read errors
usb: serial: handle -ENODEV quietly in generic_submit_read_urb
drivers/usb/serial/generic.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--
2.1.4
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