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authorFelipe Balbi <balbi@ti.com>2011-03-21 13:25:08 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2011-04-23 04:31:53 +0400
commitb1c43f82c5aa265442f82dba31ce985ebb7aa71c (patch)
tree8b344d8d5355b30e8deff901180edc708a653227 /drivers/net/irda/irtty-sir.c
parente9a470f445271eb157ee860a93b062324402fc3a (diff)
downloadlinux-b1c43f82c5aa265442f82dba31ce985ebb7aa71c.tar.xz
tty: make receive_buf() return the amout of bytes received
it makes it simpler to keep track of the amount of bytes received and simplifies how flush_to_ldisc counts the remaining bytes. It also fixes a bug of lost bytes on n_tty when flushing too many bytes via the USB serial gadget driver. Tested-by: Stefan Bigler <stefan.bigler@keymile.com> Tested-by: Toby Gray <toby.gray@realvnc.com> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/net/irda/irtty-sir.c')
-rw-r--r--drivers/net/irda/irtty-sir.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/net/irda/irtty-sir.c b/drivers/net/irda/irtty-sir.c
index 3352b2443e58..035861d8acb1 100644
--- a/drivers/net/irda/irtty-sir.c
+++ b/drivers/net/irda/irtty-sir.c
@@ -216,23 +216,23 @@ static int irtty_do_write(struct sir_dev *dev, const unsigned char *ptr, size_t
* usbserial: urb-complete-interrupt / softint
*/
-static void irtty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
- char *fp, int count)
+static unsigned int irtty_receive_buf(struct tty_struct *tty,
+ const unsigned char *cp, char *fp, int count)
{
struct sir_dev *dev;
struct sirtty_cb *priv = tty->disc_data;
int i;
- IRDA_ASSERT(priv != NULL, return;);
- IRDA_ASSERT(priv->magic == IRTTY_MAGIC, return;);
+ IRDA_ASSERT(priv != NULL, return -ENODEV;);
+ IRDA_ASSERT(priv->magic == IRTTY_MAGIC, return -EINVAL;);
if (unlikely(count==0)) /* yes, this happens */
- return;
+ return 0;
dev = priv->dev;
if (!dev) {
IRDA_WARNING("%s(), not ready yet!\n", __func__);
- return;
+ return -ENODEV;
}
for (i = 0; i < count; i++) {
@@ -242,11 +242,13 @@ static void irtty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
if (fp && *fp++) {
IRDA_DEBUG(0, "Framing or parity error!\n");
sirdev_receive(dev, NULL, 0); /* notify sir_dev (updating stats) */
- return;
+ return -EINVAL;
}
}
sirdev_receive(dev, cp, count);
+
+ return count;
}
/*