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tty: make receive_buf() return the amout of bytes received

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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>
This commit is contained in:
Felipe Balbi
2011-03-21 12:25:08 +02:00
committed by Greg Kroah-Hartman
parent e9a470f445
commit b1c43f82c5
20 changed files with 125 additions and 113 deletions
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6
drivers/tty/n_gsm.c
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@@ -2138,8 +2138,8 @@ static void gsmld_detach_gsm(struct tty_struct *tty, struct gsm_mux *gsm)
gsm->tty = NULL;
}
static void gsmld_receive_buf(struct tty_struct *tty, const unsigned char *cp,
char *fp, int count)
static unsigned int gsmld_receive_buf(struct tty_struct *tty,
const unsigned char *cp, char *fp, int count)
{
struct gsm_mux *gsm = tty->disc_data;
const unsigned char *dp;
@@ -2173,6 +2173,8 @@ static void gsmld_receive_buf(struct tty_struct *tty, const unsigned char *cp,
}
/* FASYNC if needed ? */
/* If clogged call tty_throttle(tty); */
return count;
}
/**