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| author | Johan Hovold <johan@kernel.org> | 2020-10-25 18:45:49 +0100 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2020-11-04 11:01:14 +0100 |
| commit | c01d2c58698f710c9e13ba3e2d296328606f74fd (patch) | |
| tree | 23bf521b773d543a083d051a6e3ffe657ae8d827 /drivers/usb/serial/keyspan_pda.c | |
| parent | 7353cad7ee4deaefc16e94727e69285563e219f6 (diff) | |
| download | linux-c01d2c58698f710c9e13ba3e2d296328606f74fd.tar.gz linux-c01d2c58698f710c9e13ba3e2d296328606f74fd.tar.bz2 linux-c01d2c58698f710c9e13ba3e2d296328606f74fd.zip | |
USB: serial: keyspan_pda: fix stalled writes
Make sure to clear the write-busy flag also in case no new data was
submitted due to lack of device buffer space so that writing is
resumed once space again becomes available.
Fixes: 507ca9bc0476 ("[PATCH] USB: add ability for usb-serial drivers to determine if their write urb is currently being used.")
Cc: stable <stable@vger.kernel.org> # 2.6.13
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/usb/serial/keyspan_pda.c')
| -rw-r--r-- | drivers/usb/serial/keyspan_pda.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c index 17b60e5a9f1f..d6ebde779e85 100644 --- a/drivers/usb/serial/keyspan_pda.c +++ b/drivers/usb/serial/keyspan_pda.c @@ -548,7 +548,7 @@ static int keyspan_pda_write(struct tty_struct *tty, rc = count; exit: - if (rc < 0) + if (rc <= 0) set_bit(0, &port->write_urbs_free); return rc; } |