linux-stable.git/drivers/tty/serial, branch v4.1.26

QE-UART: add "fsl,t1040-ucc-uart" to of_device_id

2016-06-03T23:15:41+00:00

[ Upstream commit 11ca2b7ab432eb90906168c327733575e68d388f ]

New bindings use "fsl,t1040-ucc-uart" as the compatible for qe-uart.
So add it.

Signed-off-by: Zhao Qiang 
Cc: stable 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Sasha Levin

serial: 8250_pci: fix divide error bug if baud rate is 0

2016-06-03T23:15:35+00:00

[ Upstream commit 6f210c18c1c0f016772c8cd51ae12a02bfb9e7ef ]

Since commit 21947ba654a6 ("serial: 8250_pci: replace switch-case by
formula"), the 8250 driver crashes in the byt_set_termios() function
with a divide error. This is caused by the fact that a baud rate of 0 (B0)
is not handled properly. Fix it by falling back to B9600 in this case.

Signed-off-by: David Müller 
Fixes: 21947ba654a6 ("serial: 8250_pci: replace switch-case by formula")
Cc: stable@vger.kernel.org
Suggested-by: Andy Shevchenko 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Sasha Levin

tty: Add support for PCIe WCH382 2S multi-IO card

2016-02-28T05:09:49+00:00

[ Upstream commit 7dde55787b43a8f2b4021916db38d90c03a2ec64 ]

WCH382 2S board is a PCIe card with 2 DB9 COM ports detected as
Serial controller: Device 1c00:3253 (rev 10) (prog-if 05 [16850])

Signed-off-by: Jeremy McNicoll 
Cc: stable 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Sasha Levin

serial: omap: Prevent DoS using unprivileged ioctl(TIOCSRS485)

2016-02-28T05:09:48+00:00

[ Upstream commit 308bbc9ab838d0ace0298268c7970ba9513e2c65 ]

The omap-serial driver emulates RS485 delays using software timers,
but neglects to clamp the input values from the unprivileged
ioctl(TIOCSRS485). Because the software implementation busy-waits,
malicious userspace could stall the cpu for ~49 days.

Clamp the input values to < 100ms.

Fixes: 4a0ac0f55b18 ("OMAP: add RS485 support")
Cc:   # 3.12+
Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Sasha Levin

serial: 8250_pci: Add Intel Broadwell ports

2016-02-15T20:45:26+00:00

[ Upstream commit 6c55d9b98335f7f6bd5f061866ff1633401f3a44 ]

Some recent (early 2015) macbooks have Intel Broadwell where LPSS UARTs are
PCI enumerated instead of ACPI. The LPSS UART block is pretty much same as
used on Intel Baytrail so we can reuse the existing Baytrail setup code.

Add both Broadwell LPSS UART ports to the list of supported devices.

Signed-off-by: Leif Liddy 
Signed-off-by: Mika Westerberg 
Reviewed-by: Andy Shevchenko 
Reviewed-by: Heikki Krogerus 
Cc: stable 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Sasha Levin

serial: 8250_pci: Add support for 12 port Exar boards

2015-11-09T22:33:40+00:00

commit be32c0cf0462c36f482b5ddcff1d8371be1e183c upstream.

The Exar XR17V358 can also be combined with a XR17V354 chip to act as a
single 12 port chip. This works the same way as the combining two XR17V358
chips. But the reported device id then is 0x4358.

Signed-off-by: Soeren Grunewald 
Signed-off-by: Greg Kroah-Hartman

Revert "serial: 8250_dma: don't bother DMA with small transfers"

2015-11-09T22:33:37+00:00

commit f967fc8f165fadb72166f2bd4785094b3ca21307 upstream.

This reverts commit 9119fba0cfeda6d415c9f068df66838a104b87cb.

This commit prevents from sending "big" file using Bluetooth.
When sending a lot of data quickly through the Bluetooth interface, and
after a variable amount of data sent, transfer fails with error:
    kernel: [  415.247453] Bluetooth: hci0 hardware error 0x00

Found on T100TA.

After reverting this commit, send works fine for any file size.

Signed-off-by: Frederic Danis 
Fixes: 9119fba0cfed (serial: 8250_dma: don't bother DMA with small transfers)
Reviewed-by: Heikki Krogerus 
Acked-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Greg Kroah-Hartman

serial: atmel: fix error path of probe function

2015-10-22T21:43:27+00:00

commit 8f1bd8f2ad2358d6a88c115481ff3e69817d1bde upstream.

If atmel_init_gpios fails the port has already been marked as busy (in
line 2629), so this must be undone in the error path.

This bug was introduced because I created the patch that finally
became 722ccf416ac2 ("serial: atmel: fix error handling when
mctrl_gpio_init fails") on top of 3.19 which didn't have commit
6fbb9bdf0f3f ("tty/serial: at91: fix error handling in
atmel_serial_probe()") yet.

Signed-off-by: Uwe Kleine-König 
Fixes: 722ccf416ac2 ("serial: atmel: fix error handling when mctrl_gpio_init fails")
Acked-by: Nicolas Ferre 
Signed-off-by: Greg Kroah-Hartman

serial: 8250: add uart_config entry for PORT_RT2880

2015-10-22T21:43:27+00:00

commit 3c5a0357fdb3a9116a48dbdb0abb91fd23fbff80 upstream.

This adds an entry to the uart_config table for PORT_RT2880
enabling rx/tx FIFOs.  The UART is actually a Palmchip BK-3103
which is found in several devices from Alchemy/RMI, Ralink, and
Sigma Designs.

Signed-off-by: Mans Rullgard 
Signed-off-by: Greg Kroah-Hartman

serial/amba-pl011: Disable interrupts around TX softirq

2015-10-22T21:43:20+00:00

pl011_tx_softirq() currently uses spin_{,un}lock(), which are not
sufficient to inhibit pl011_int() from being triggered by a local
IRQ and trying to re-take the same lock.  This can lead to
deadlocks.

This patch uses the _irq() locking variants instead to ensure that
pl011_int() handling for a given port is deferred until any
pl011_tx_softirq() work for that port is complete.


Notes for stable:

This patch fixes an issue that is fixed by the following upstream
commit, which is a more substantial rewrite of the affected code,
fixing multiple, mostly more minor issues:

        1e84d22322ceed4767db1e5342c830dd60c8210f
        serial/amba-pl011: Refactor and simplify TX FIFO handling

The upstream patch was rejected for stable on the reasonable grounds
that it was too big and complex a patch.  The original buggy code was
merged in v4.1, and the rewrite was merged in v4.2, leaving only v4.1
affected.


This patch replaces the 1e84d22, for 4.1.x only.

Fixes: 734745caeb9f serial/amba-pl011: Activate TX IRQ passively
Signed-off-by: Dave Martin 
Tested-by: Robin Murphy 
Tested-by: Stefan Wahren 
Signed-off-by: Greg Kroah-Hartman