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| author | Johan Hovold <jhovold@gmail.com> | 2009-12-29 01:01:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-03 01:53:50 +0300 |
| commit | f2b5cc834b69d2999b749144481de9a94f01bc48 (patch) | |
| tree | 7cc9ef8bfecd272c946e4cec279ef555e479c174 /drivers/usb/serial/ch341.c | |
| parent | 6a9b15fed4dca1f90e41ae0cfe35aaa39a20f495 (diff) | |
| download | linux-f2b5cc834b69d2999b749144481de9a94f01bc48.tar.xz | |
USB: ch341: fix DMA buffer on stack
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial/ch341.c')
| -rw-r--r-- | drivers/usb/serial/ch341.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c index 5e455f4a792e..2942c6d381d0 100644 --- a/drivers/usb/serial/ch341.c +++ b/drivers/usb/serial/ch341.c @@ -392,16 +392,22 @@ static void ch341_break_ctl(struct tty_struct *tty, int break_state) struct usb_serial_port *port = tty->driver_data; int r; uint16_t reg_contents; - uint8_t break_reg[2]; + uint8_t *break_reg; dbg("%s()", __func__); + break_reg = kmalloc(2, GFP_KERNEL); + if (!break_reg) { + dev_err(&port->dev, "%s - kmalloc failed\n", __func__); + return; + } + r = ch341_control_in(port->serial->dev, CH341_REQ_READ_REG, - ch341_break_reg, 0, break_reg, sizeof(break_reg)); + ch341_break_reg, 0, break_reg, 2); if (r < 0) { dev_err(&port->dev, "%s - USB control read error (%d)\n", __func__, r); - return; + goto out; } dbg("%s - initial ch341 break register contents - reg1: %x, reg2: %x", __func__, break_reg[0], break_reg[1]); @@ -422,6 +428,8 @@ static void ch341_break_ctl(struct tty_struct *tty, int break_state) if (r < 0) dev_err(&port->dev, "%s - USB control write error (%d)\n", __func__, r); +out: + kfree(break_reg); } static int ch341_tiocmset(struct tty_struct *tty, struct file *file, |