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| author | Johan Hovold <jhovold@gmail.com> | 2009-12-28 23:01:55 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-02 14:53:56 -0800 |
| commit | 9e221a35f82cbef0397d81fed588bafba95b550c (patch) | |
| tree | 70990f09b27aa3f5d1e222e7772d8a57529d1b59 /drivers/usb/serial/mos7840.c | |
| parent | eb771e2c6507e0a317e576a3147252ebcb64035a (diff) | |
| download | linux-stable-9e221a35f82cbef0397d81fed588bafba95b550c.tar.gz linux-stable-9e221a35f82cbef0397d81fed588bafba95b550c.tar.bz2 linux-stable-9e221a35f82cbef0397d81fed588bafba95b550c.zip | |
USB: mos7840: fix DMA buffers on stack and endianess bugs
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial/mos7840.c')
| -rw-r--r-- | drivers/usb/serial/mos7840.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c index 2cfe2451ed97..04bef4bebc4a 100644 --- a/drivers/usb/serial/mos7840.c +++ b/drivers/usb/serial/mos7840.c @@ -283,12 +283,19 @@ static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, { struct usb_device *dev = port->serial->dev; int ret = 0; + u8 *buf; + + buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); + if (!buf) + return -ENOMEM; ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, - MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH, + MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); + *val = buf[0]; dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val); - *val = (*val) & 0x00ff; + + kfree(buf); return ret; } @@ -341,6 +348,11 @@ static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, struct usb_device *dev = port->serial->dev; int ret = 0; __u16 Wval; + u8 *buf; + + buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); + if (!buf) + return -ENOMEM; /* dbg("application number is %4x", (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ @@ -364,9 +376,11 @@ static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, } } ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, - MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH, + MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); - *val = (*val) & 0x00ff; + *val = buf[0]; + + kfree(buf); return ret; } |