The patch titled
ti_usb_3410_5052: Extend locking to msr and shadow mcr
has been added to the -mm tree. Its filename is
ti_usb_3410_5052-extend-locking-to-msr-and-shadow-mcr.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: ti_usb_3410_5052: Extend locking to msr and shadow mcr
From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Alan Cox <alan@xxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/ti_usb_3410_5052.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff -puN drivers/usb/serial/ti_usb_3410_5052.c~ti_usb_3410_5052-extend-locking-to-msr-and-shadow-mcr drivers/usb/serial/ti_usb_3410_5052.c
--- a/drivers/usb/serial/ti_usb_3410_5052.c~ti_usb_3410_5052-extend-locking-to-msr-and-shadow-mcr
+++ a/drivers/usb/serial/ti_usb_3410_5052.c
@@ -1022,14 +1022,17 @@ static int ti_tiocmget(struct usb_serial
unsigned int result;
unsigned int msr;
unsigned int mcr;
+ unsigned long flags;
dbg("%s - port %d", __FUNCTION__, port->number);
if (tport == NULL)
return -ENODEV;
+ spin_lock_irqsave(&tport->tp_lock, flags);
msr = tport->tp_msr;
mcr = tport->tp_shadow_mcr;
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
| ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
@@ -1050,12 +1053,14 @@ static int ti_tiocmset(struct usb_serial
{
struct ti_port *tport = usb_get_serial_port_data(port);
unsigned int mcr;
+ unsigned long flags;
dbg("%s - port %d", __FUNCTION__, port->number);
if (tport == NULL)
return -ENODEV;
+ spin_lock_irqsave(&tport->tp_lock, flags);
mcr = tport->tp_shadow_mcr;
if (set & TIOCM_RTS)
@@ -1071,6 +1076,7 @@ static int ti_tiocmset(struct usb_serial
mcr &= ~TI_MCR_DTR;
if (clear & TIOCM_LOOP)
mcr &= ~TI_MCR_LOOP;
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
return ti_set_mcr(tport, mcr);
}
@@ -1358,14 +1364,17 @@ static void ti_send(struct ti_port *tpor
static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
{
+ unsigned long flags;
int status;
status = ti_write_byte(tport->tp_tdev,
tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
+ spin_lock_irqsave(&tport->tp_lock, flags);
if (!status)
tport->tp_shadow_mcr = mcr;
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
return status;
}
_
Patches currently in -mm which might be from alan@xxxxxxxxxxxxxxxxxxx are
origin.patch
libata-isolate-and-rework-cable-logic.patch
pata_amd-fix-sparse-warning.patch
8390-split-8390-support-into-a-pausing-and-a-non-pausing-driver-core.patch
parisc-new-termios-definitions.patch
megaraid-outb_p-extermination.patch
usb-serial-prepare-for-bkl-push-down.patch
ftdi_sio-note-missing-locking.patch
usb-serial-note-mos7480-and-option-dont-lock-modem-status.patch
io_ti-lock-mcr-and-msr-shadows-properly.patch
iuu_phoenix-lock-priv-tiostatus-properly.patch
kobil_sct-get-rid-of-unneeded-priv-line_state.patch
ti_usb_3410_5052-extend-locking-to-msr-and-shadow-mcr.patch
git-watchdog.patch
crisv10-prepare-for-bkl-push-down.patch
fix-tty-speed-handling-on-8250.patch
uart_get_baud_rate-stop-mangling-termios.patch
do_task_stat-dont-take-rcu_read_lock.patch
amiserial-prepare-for-locking-relaxation-in-caller.patch
cyclades-prepare-for-relaxed-locking-in-callers.patch
epca-lock_kernel-push-down.patch
esp-lock_kernel-push-down.patch
isicom-prepare-for-lock_kernel-push-down.patch
isicom-istallion-prepare-for-lock_kernel-pushdown.patch
mxser-prepare-for-bkl-pushdown.patch
nozomi-prepare-for-bkl-pushdown.patch
riscom8-prepare-for-bkl-pushdown.patch
rocket-prepare-for-bkl-pushdown.patch
serial167-prepare-to-push-bkl-down-into-drivers.patch
specialix-prepare-for-bkl-pushdown.patch
stallion-prepare-for-bkl-push-down.patch
sx-prepare-for-bkl-pushdown.patch
synclink-series-prepare-for-bkl-pushdown.patch
viocons-bkl-locking.patch
vt_ioctl-prepare-for-bkl-push-down.patch
isdn_tty-prepare-for-bkl-push-down.patch
68360serial-note-that-there-isnt-any-info-mcr-locking.patch
serial_core-prepare-for-bkl-push-down.patch
tty-bkl-pushdown.patch
tty-bkl-pushdown-fix1.patch
redo-locking-of-tty-pgrp.patch
put_pid-make-sure-we-dont-free-the-live-pid.patch
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