From: Steve Holland <sdh4@xxxxxxxxxxx> Follow T&M convention of obeying EOM flag. Avoid exception cases where instrument response size matches a buffer size. Signed-off-by: Steve Holland <sdh4@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx> --- drivers/usb/class/usbtmc.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c index 91d3a94..6395f22 100644 --- a/drivers/usb/class/usbtmc.c +++ b/drivers/usb/class/usbtmc.c @@ -485,7 +485,8 @@ static ssize_t usbtmc_read(struct file *filp, char __user *buf, } done += n_characters; - if (n_characters < USBTMC_SIZE_IOBUFFER) + /* Terminate if end-of-message bit recieved from device */ + if ((buffer[8] & 0x01) && (actual >= n_characters + 12)) remaining = 0; else remaining -= n_characters; -- 1.6.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
