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authorFelipe Balbi <balbi@ti.com>2011-03-21 12:25:08 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2011-04-22 17:31:53 -0700
commitb1c43f82c5aa265442f82dba31ce985ebb7aa71c (patch)
tree8b344d8d5355b30e8deff901180edc708a653227 /drivers/net/ppp_async.c
parente9a470f445271eb157ee860a93b062324402fc3a (diff)
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/ppp_async.c')
-rw-r--r--drivers/net/ppp_async.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/ppp_async.c b/drivers/net/ppp_async.c
index a1b82c9c67d2..53872d7d7382 100644
--- a/drivers/net/ppp_async.c
+++ b/drivers/net/ppp_async.c
@@ -340,7 +340,7 @@ ppp_asynctty_poll(struct tty_struct *tty, struct file *file, poll_table *wait)
}
/* May sleep, don't call from interrupt level or with interrupts disabled */
-static void
+static unsigned int
ppp_asynctty_receive(struct tty_struct *tty, const unsigned char *buf,
char *cflags, int count)
{
@@ -348,7 +348,7 @@ ppp_asynctty_receive(struct tty_struct *tty, const unsigned char *buf,
unsigned long flags;
if (!ap)
- return;
+ return -ENODEV;
spin_lock_irqsave(&ap->recv_lock, flags);
ppp_async_input(ap, buf, cflags, count);
spin_unlock_irqrestore(&ap->recv_lock, flags);
@@ -356,6 +356,8 @@ ppp_asynctty_receive(struct tty_struct *tty, const unsigned char *buf,
tasklet_schedule(&ap->tsk);
ap_put(ap);
tty_unthrottle(tty);
+
+ return count;
}
static void