diff options
| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-02-20 21:49:53 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-04-25 06:16:38 +0200 |
| commit | 9b0f2582d57d4c9081307c86e11afc9169de7d3e (patch) | |
| tree | 77acda33a2be1f9a9fde1c63902cac126c10ebdb /drivers/usb/serial/ftdi_sio.c | |
| parent | USB: usb-serial: Prepare for BKL push down (diff) | |
| download | linux-9b0f2582d57d4c9081307c86e11afc9169de7d3e.tar.xz linux-9b0f2582d57d4c9081307c86e11afc9169de7d3e.zip | |
USB: ftdi_sio: Note missing locking
The ftdi_sio driver has no internal locking on the dtr/rts state. Flag
that up for someone to fix.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial/ftdi_sio.c')
| -rw-r--r-- | drivers/usb/serial/ftdi_sio.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 3abb3c863647..4643212eb959 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -533,9 +533,8 @@ static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned } buf = kmalloc(1, GFP_NOIO); - if (!buf) { + if (!buf) return -ENOMEM; - } clear &= ~set; /* 'set' takes precedence over 'clear' */ urb_value = 0; @@ -568,6 +567,7 @@ static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned (clear & TIOCM_DTR) ? "LOW" : "unchanged", (set & TIOCM_RTS) ? "HIGH" : (clear & TIOCM_RTS) ? "LOW" : "unchanged"); + /* FIXME: locking on last_dtr_rts */ priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set; } return rv; |