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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/misc/ti-st
parente9a470f445271eb157ee860a93b062324402fc3a (diff)
downloadlinux-b1c43f82c5aa265442f82dba31ce985ebb7aa71c.tar.bz2
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/misc/ti-st')
-rw-r--r--drivers/misc/ti-st/st_core.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/misc/ti-st/st_core.c b/drivers/misc/ti-st/st_core.c
index 486117f72c9f..cb98a7da98ef 100644
--- a/drivers/misc/ti-st/st_core.c
+++ b/drivers/misc/ti-st/st_core.c
@@ -744,8 +744,8 @@ static void st_tty_close(struct tty_struct *tty)
pr_debug("%s: done ", __func__);
}
-static void st_tty_receive(struct tty_struct *tty, const unsigned char *data,
- char *tty_flags, int count)
+static unsigned int st_tty_receive(struct tty_struct *tty,
+ const unsigned char *data, char *tty_flags, int count)
{
#ifdef VERBOSE
print_hex_dump(KERN_DEBUG, ">in>", DUMP_PREFIX_NONE,
@@ -758,6 +758,8 @@ static void st_tty_receive(struct tty_struct *tty, const unsigned char *data,
*/
st_recv(tty->disc_data, data, count);
pr_debug("done %s", __func__);
+
+ return count;
}
/* wake-up function called in from the TTY layer