linux/drivers/tty/serial, branch v3.14

sparc: serial: Clean up the locking for -rt

2014-03-06T21:32:25Z

Signed-off-by: David S. Miller Tested-by: Allen Pais

serial: 8250: Support XR17V35x fraction divisor

2014-02-13T18:02:19Z

The Exar XR17V35x family of UARTs have an additional fractional divisor register (DLD) which was not being used. Calculate and set this register for these devices to reduce their baud rate error. Signed-off-by: Joe Schultz Signed-off-by: Aaron Sierra Signed-off-by: Greg Kroah-Hartman

serial: sirf: fix kernel panic caused by unpaired spinlock

2014-02-13T18:02:19Z

commit 8b9ade9f74f8a279 coming from Viresh Kumar "tty: serial: sirfsoc: drop uart_port->lock before calling tty_flip_buffer_push()" broke sirfsoc uart driver by knic: [ 5.129122] BUG: spinlock already unlocked on CPU#0, ip6tables/1331 [ 5.132554] lock: sirfsoc_uart_ports+0x4/0x8a0, .magic: dead4ead, .owner: /-1, .owner_cpu: -1 [ 5.141651] CPU: 0 PID: 1331 Comm: ip6tables Tainted: G W O 3.10.16 #3 [ 5.148866] [] (unwind_backtrace+0x0/0xe0) from [] (show_stack+0x10/0x14) [ 5.157362] [] (show_stack+0x10/0x14) from [] (do_raw_spin_unlock+0x40/0xc8) [ 5.166125] [] (do_raw_spin_unlock+0x40/0xc8) from [] (_raw_spin_unlock+0x8/0x40) [ 5.175322] [] (_raw_spin_unlock+0x8/0x40) from [] (sirfsoc_uart_pio_rx_chars+0xa4/0xc0) [ 5.185120] [] (sirfsoc_uart_pio_rx_chars+0xa4/0xc0) from [] (sirfsoc_rx_tmo_process_tl+0xdc/0x1e0) [ 5.195875] [] (sirfsoc_rx_tmo_process_tl+0xdc/0x1e0) from [] (tasklet_action+0x8c/0xec) [ 5.205673] [] (tasklet_action+0x8c/0xec) from [] (__do_softirq+0xec/0x1d4) [ 5.214347] [] (__do_softirq+0xec/0x1d4) from [] (do_softirq+0x48/0x54) [ 5.222674] [] (do_softirq+0x48/0x54) from [] (irq_exit+0x74/0xc0) [ 5.230573] [] (irq_exit+0x74/0xc0) from [] (handle_IRQ+0x6c/0x90) [ 5.238465] [] (handle_IRQ+0x6c/0x90) from [] (__irq_svc+0x40/0x70) [ 5.246446] [] (__irq_svc+0x40/0x70) from [] (mark_page_accessed+0xc/0x68) [ 5.255034] [] (mark_page_accessed+0xc/0x68) from [] (unmap_single_vma+0x3bc/0x550) [ 5.264402] [] (unmap_single_vma+0x3bc/0x550) from [] (unmap_vmas+0x44/0x54) [ 5.273164] [] (unmap_vmas+0x44/0x54) from [] (exit_mmap+0xc4/0x1e0) [ 5.281233] [] (exit_mmap+0xc4/0x1e0) from [] (mmput+0x3c/0xdc) [ 5.288868] [] (mmput+0x3c/0xdc) from [] (do_exit+0x30c/0x828) [ 5.296413] [] (do_exit+0x30c/0x828) from [] (do_group_exit+0x4c/0xb0) [ 5.304653] [] (do_group_exit+0x4c/0xb0) from [] (__wake_up_parent+0x0/0x18) Root cause: the commit dropped uart_port->lock before calling tty_flip_buffer_push(), but in sirfsoc-uart, sirfsoc_uart_pio_rx_chars() can be called by sirfsoc_rx_tmo_process_tl(). here uart_port->lock has not been taken yet. so that caused unpaired lock/unlock. Solution: This patch is doing a quick fix for that, it adds spin_lock/unlock(&port->lock) protect to sirfsoc_uart_pio_rx_chars() in sirfsoc_rx_tmo_process_tl() to keep spin_lock/unlock in pair. Signed-off-by: Qipan Li Signed-off-by: Barry Song Cc: stable # 3.12 Signed-off-by: Greg Kroah-Hartman

serial: 8250_pci: unbreak last serial ports on NetMos 9865 cards

2014-02-13T17:57:33Z

Aparently 9865 uses standard BAR encoding scheme (unlike 99xx cards). Current pci_netmos_9900_setup() uses wrong BAR indices for the 9865 PCI device, function 2. Using standard BAR indices makes all 6 ports work for me. Thus disable the NetMos 9900 quirk for NetMos 9865 pci device. For the reference, here is the relevant part of lspci for my device: 02:07.0 Serial controller: MosChip Semiconductor Technology Ltd. PCI 9865 Multi-I/O Controller (prog-if 02 [16550]) Subsystem: Device a000:1000 Flags: bus master, medium devsel, latency 32, IRQ 17 I/O ports at ac00 [size=8] Memory at fcfff000 (32-bit, non-prefetchable) [size=4K] Memory at fcffe000 (32-bit, non-prefetchable) [size=4K] Capabilities: [48] Power Management version 2 Kernel driver in use: serial 02:07.1 Serial controller: MosChip Semiconductor Technology Ltd. PCI 9865 Multi-I/O Controller (prog-if 02 [16550]) Subsystem: Device a000:1000 Flags: bus master, medium devsel, latency 32, IRQ 18 I/O ports at a800 [size=8] Memory at fcffd000 (32-bit, non-prefetchable) [size=4K] Memory at fcffc000 (32-bit, non-prefetchable) [size=4K] Capabilities: [48] Power Management version 2 Kernel driver in use: serial 02:07.2 Communication controller: MosChip Semiconductor Technology Ltd. PCI 9865 Multi-I/O Controller Subsystem: Device a000:3004 Flags: bus master, medium devsel, latency 32, IRQ 19 I/O ports at a400 [size=8] I/O ports at a000 [size=8] I/O ports at 9c00 [size=8] I/O ports at 9800 [size=8] Memory at fcffb000 (32-bit, non-prefetchable) [size=4K] Capabilities: [48] Power Management version 2 Kernel driver in use: serial Signed-off-by: Dmitry Eremin-Solenikov Signed-off-by: Greg Kroah-Hartman

serial: omap: fix rs485 probe on defered pinctrl

2014-02-13T17:57:33Z

If the gpio is not yet available we better also defer the probing in the rs485 case. Signed-off-by: Michael Grzeschik Signed-off-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman

serial: 8250_dw: fix compilation warning when !CONFIG_PM_SLEEP

2014-02-13T17:57:33Z

CONFIG_PM will be set if either or both CONFIG_PM_SLEEP and CONFIG_PM_RUNTIME is set. Compiling the driver with !CONFIG_PM_SLEEP causes following compilation warnings: drivers/tty/serial/8250/8250_dw.c:404:12: warning: ‘dw8250_suspend’ defined but not used [-Wunused-function] drivers/tty/serial/8250/8250_dw.c:413:12: warning: ‘dw8250_resume’ defined but not used [-Wunused-function] Fix this by using CONFIG_PM_SLEEP instead. Signed-off-by: Mika Westerberg Signed-off-by: Greg Kroah-Hartman

serial: omap-serial: Move info message to probe function

2014-02-13T17:56:08Z

Currently the info message about a missing wakeirq for uart is printed every time the serial driver's startup function is called. This happens multiple times and not just once. This can cause lots of extra messages at boot time, slowing things down. It is caused by commit 2a0b965cfb6e (serial: omap: Add support for optional wake-up) which was applied for v3.13-rc1. This patch moves the infomessage to the probe function to display it only once. Reported-by: Uwe Kleine-König Acked-by: Tony Lindgren Signed-off-by: Markus Pargmann Acked-by: Uwe Kleine-König Cc: stable # 3.13 Signed-off-by: Greg Kroah-Hartman

Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

2014-01-31T01:20:32Z

Pull MIPS updates from Ralf Baechle: "The most notable new addition inside this pull request is the support for MIPS's latest and greatest core called "inter/proAptiv". The patch series describes this core as follows. "The interAptiv is a power-efficient multi-core microprocessor for use in system-on-chip (SoC) applications. The interAptiv combines a multi-threading pipeline with a coherence manager to deliver improved computational throughput and power efficiency. The interAptiv can contain one to four MIPS32R3 interAptiv cores, system level coherence manager with L2 cache, optional coherent I/O port, and optional floating point unit." The platform specific patches touch all 3 Broadcom families. It adds support for the new Broadcom/Netlogix XLP9xx Soc, building a common BCM63XX SMP kernel for all BCM63XX SoCs regardless of core type/count and full gpio button/led descriptions for BCM47xx. The rest of the series are cleanups and bug fixes that are MIPS generic and consist largely of changes that Imgtec/MIPS had published in their linux-mti-3.10.git stable tree. Random other cleanups and patches preparing code to be merged in 3.15" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (139 commits) mips: select ARCH_MIGHT_HAVE_PC_SERIO mips: delete non-required instances of include MIPS: KVM: remove shadow_tlb code MIPS: KVM: use common EHINV aware UNIQUE_ENTRYHI mips/ide: flush dcache also if icache does not snoop dcache MIPS: BCM47XX: fix position of cpu_wait disabling MIPS: BCM63XX: select correct MIPS_L1_CACHE_SHIFT value MIPS: update MIPS_L1_CACHE_SHIFT based on MIPS_L1_CACHE_SHIFT_ MIPS: introduce MIPS_L1_CACHE_SHIFT_ MIPS: ZBOOT: gather string functions into string.c arch/mips/pci: don't check resource with devm_ioremap_resource arch/mips/lantiq/xway: don't check resource with devm_ioremap_resource bcma: gpio: don't cast u32 to unsigned long ssb: gpio: add own IRQ domain MIPS: BCM47XX: fix sparse warnings in board.c MIPS: BCM47XX: add board detection for Linksys WRT54GS V1 MIPS: BCM47XX: fix detection for some boards MIPS: BCM47XX: Enable buttons support on SSB MIPS: BCM47XX: Convert WNDR4500 to new syntax MIPS: BCM47XX: Use "timer" trigger for status LEDs ...

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

2014-01-31T01:07:18Z

Pull more powerpc bits from Ben Herrenschmidt: "Here are a few more powerpc bits for this merge window. The bulk is made of two pull requests from Scott and Anatolij that I had missed previously (they arrived while I was away). Since both their branches are in -next independently, and the content has been around for a little while, they can still go in. The rest is mostly bug and regression fixes, a small series of cleanups to our pseries cpuidle code (including moving it to the right place), and one new cpuidle bakend for the powernv platform. I also wired up the new sched_attr syscalls" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (37 commits) powerpc: Wire up sched_setattr and sched_getattr syscalls powerpc/hugetlb: Replace __get_cpu_var with get_cpu_var powerpc: Make sure "cache" directory is removed when offlining cpu powerpc/mm: Fix mmap errno when MAP_FIXED is set and mapping exceeds the allowed address space powerpc/powernv/cpuidle: Back-end cpuidle driver for powernv platform. powerpc/pseries/cpuidle: smt-snooze-delay cleanup. powerpc/pseries/cpuidle: Remove MAX_IDLE_STATE macro. powerpc/pseries/cpuidle: Make cpuidle-pseries backend driver a non-module. powerpc/pseries/cpuidle: Use cpuidle_register() for initialisation. powerpc/pseries/cpuidle: Move processor_idle.c to drivers/cpuidle. powerpc: Fix 32-bit frames for signals delivered when transactional powerpc/iommu: Fix initialisation of DART iommu table powerpc/numa: Fix decimal permissions powerpc/mm: Fix compile error of pgtable-ppc64.h powerpc: Fix hw breakpoints on !HAVE_HW_BREAKPOINT configurations clk: corenet: Adds the clock binding powerpc/booke64: Guard e6500 tlb handler with CONFIG_PPC_FSL_BOOK3E powerpc/512x: dts: add MPC5125 clock specs powerpc/512x: clk: support MPC5121/5123/5125 SoC variants powerpc/512x: clk: enforce even SDHC divider values ...

Merge remote-tracking branch 'agust/next' into next

2014-01-29T05:53:55Z

<< Switch mpc512x to the common clock framework and adapt mpc512x drivers to use the new clock driver. Old PPC_CLOCK code is removed entirely since there are no users any more. >>