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authorLinus Torvalds <torvalds@linux-foundation.org>2013-02-21 13:41:04 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-21 13:41:04 -0800
commit21eaab6d19ed43e82ed39c8deb7f192134fb4a0e (patch)
treed995205afdcb7f47462bcd28067dc0c4ab0b7b02 /drivers/usb/gadget
parent74e1a2a39355b2d3ae8c60c78d8add162c6d7183 (diff)
parent9e17df37d710f8998e9cb10a548304fe33d4a5c2 (diff)
Merge tag 'tty-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial patches from Greg Kroah-Hartman: "Here's the big tty/serial driver patches for 3.9-rc1. More tty port rework and fixes from Jiri here, as well as lots of individual serial driver updates and fixes. All of these have been in the linux-next tree for a while." * tag 'tty-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (140 commits) tty: mxser: improve error handling in mxser_probe() and mxser_module_init() serial: imx: fix uninitialized variable warning serial: tegra: assume CONFIG_OF TTY: do not update atime/mtime on read/write lguest: select CONFIG_TTY to build properly. ARM defconfigs: add missing inclusions of linux/platform_device.h fb/exynos: include platform_device.h ARM: sa1100/assabet: include platform_device.h directly serial: imx: Fix recursive locking bug pps: Fix build breakage from decoupling pps from tty tty: Remove ancient hardpps() pps: Additional cleanups in uart_handle_dcd_change pps: Move timestamp read into PPS code proper pps: Don't crash the machine when exiting will do pps: Fix a use-after free bug when unregistering a source. pps: Use pps_lookup_dev to reduce ldisc coupling pps: Add pps_lookup_dev() function tty: serial: uartlite: Support uartlite on big and little endian systems tty: serial: uartlite: Fix sparse and checkpatch warnings serial/arc-uart: Miscll DT related updates (Grant's review comments) ... Fix up trivial conflicts, mostly just due to the TTY config option clashing with the EXPERIMENTAL removal.
Diffstat (limited to 'drivers/usb/gadget')
-rw-r--r--drivers/usb/gadget/Kconfig6
-rw-r--r--drivers/usb/gadget/u_serial.c15
2 files changed, 12 insertions, 9 deletions
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index c5c6fa60910d..5a0c541daf89 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -762,6 +762,7 @@ config USB_GADGET_TARGET
config USB_G_SERIAL
tristate "Serial Gadget (with CDC ACM and CDC OBEX support)"
+ depends on TTY
select USB_U_SERIAL
select USB_F_ACM
select USB_LIBCOMPOSITE
@@ -813,6 +814,8 @@ config USB_G_PRINTER
For more information, see Documentation/usb/gadget_printer.txt
which includes sample code for accessing the device file.
+if TTY
+
config USB_CDC_COMPOSITE
tristate "CDC Composite Device (Ethernet and ACM)"
depends on NET
@@ -900,6 +903,8 @@ config USB_G_MULTI_CDC
If unsure, say "y".
+endif # TTY
+
config USB_G_HID
tristate "HID Gadget"
select USB_LIBCOMPOSITE
@@ -916,6 +921,7 @@ config USB_G_HID
# Standalone / single function gadgets
config USB_G_DBGP
tristate "EHCI Debug Device Gadget"
+ depends on TTY
select USB_LIBCOMPOSITE
help
This gadget emulates an EHCI Debug device. This is useful when you want
diff --git a/drivers/usb/gadget/u_serial.c b/drivers/usb/gadget/u_serial.c
index 588a9be18ef8..c5034d9c946b 100644
--- a/drivers/usb/gadget/u_serial.c
+++ b/drivers/usb/gadget/u_serial.c
@@ -496,12 +496,8 @@ static void gs_rx_push(unsigned long _port)
req = list_first_entry(queue, struct usb_request, list);
- /* discard data if tty was closed */
- if (!tty)
- goto recycle;
-
/* leave data queued if tty was rx throttled */
- if (test_bit(TTY_THROTTLED, &tty->flags))
+ if (tty && test_bit(TTY_THROTTLED, &tty->flags))
break;
switch (req->status) {
@@ -534,7 +530,8 @@ static void gs_rx_push(unsigned long _port)
size -= n;
}
- count = tty_insert_flip_string(tty, packet, size);
+ count = tty_insert_flip_string(&port->port, packet,
+ size);
if (count)
do_push = true;
if (count != size) {
@@ -547,7 +544,7 @@ static void gs_rx_push(unsigned long _port)
}
port->n_read = 0;
}
-recycle:
+
list_move(&req->list, &port->read_pool);
port->read_started--;
}
@@ -555,8 +552,8 @@ recycle:
/* Push from tty to ldisc; without low_latency set this is handled by
* a workqueue, so we won't get callbacks and can hold port_lock
*/
- if (tty && do_push)
- tty_flip_buffer_push(tty);
+ if (do_push)
+ tty_flip_buffer_push(&port->port);
/* We want our data queue to become empty ASAP, keeping data