- Mar 09, 2012
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Jiri Slaby authored
* do not test if tty->index is in bounds. It is always. * tty->index is not a minor! Fix that. >From now on, let's assume that the parameter of the function is tty index with base being zero. This makes also the code more readable. Factually, there is no real change as tty_driver->minor_start is zero, so the tests are equivalent. But it did not make sense. And if this had changed eventually, it would have caused troubles. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Acked-by:
Jiri Kosina <jkosina@suse.cz> Cc: David Sterba <dsterba@suse.cz> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
Checking if tty->index is in bounds is not needed. The tty has the index set in the initial open. This is done in get_tty_driver. And it can be only in interval <0,driver->num). So remove the tests which check exactly this interval. Some are left untouched as they check against the current backing device count. (Leaving apart that the check is racy in most of the cases.) Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
The macro is always defined now. This was there only for historical reasons. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
This is needed because the tty buffer will become a tty_port member later. That will help us to wipe out most of the races and checks for the tty pointer in hot paths. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
The test and the assignment were racy. Make it really a singleton. This is achieved by one global variable initialized at the module init. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
It makes the code more readable. We move the setup to the allocation location because we need to initialize timers only once. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
Note that tty->ops->shutdown is called from whatever context the user drops the last tty reference from. E.g. if one takes a reference in an ISR, tty close happens on other CPU and the final tty put is from the ISR, tty->ops->shutdown will be called from that hard irq context. We would have a problem in vt if we start using tty refcounting from other contexts than user there. It is because vt's shutdown uses mutexes. This is yet to be fixed. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Reported-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
By using ASYNC_SPD_MASK instead of the single speed bits. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
This is from tty_reopen: struct tty_driver *driver = tty->driver; ... tty->driver = driver; and it doesn't make sense at all. The driver is intended to be set in initialize_tty_struct from tty_init_dev (initial open). So this set in tty_reopen is not needed. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
Remove the useless local variable and return the value itself. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
All num, magic and owner are set by alloc_tty_driver. No need to re-set them on each allocation site. pti driver sets something different to what it passes to alloc_tty_driver. It is not a bug, since we don't use the lines parameter in any way. Anyway this is fixed, and now we do the right thing. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Acked-by:
Tilman Schmidt <tilman@imap.cc> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
It was added back in 2004 and never used for anything real. Remove the only assignment in the tree as well. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
Like the rest of the kernel, make a stub from alloc_tty_driver which calls __alloc_tty_driver with proper owner. This will save us one more assignment on the driver side. Also this fixes some drivers which didn't set the owner. This allowed user to remove the module from the system even though a tty from the driver is still open. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
TTY buffer head and tail are initialized in tty_buffer_init. No need to do it once again in initialize_tty_struct where tty_buffer_init is called. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
This is a piece I missed the last time. Do not copy the functionality all over the tree. Instead, use the helper the tty layer provides us with. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Acked-by:
Oliver Neukum <oneukum@suse.de> Acked-by:
Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Alan Cox authored
We leave the existing paste mess alone and just fix up the vt side of things. Signed-off-by:
Alan Cox <alan@linux.intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Alan Cox authored
Signed-off-by:
Alan Cox <alan@linux.intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Alan Cox authored
Some of this ventures into selection which is still a complete lost cause. We are not making it any worse. It's completely busted anyway. Signed-off-by:
Alan Cox <alan@linux.intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Alan Cox authored
At this point we have the tty_lock guarding a couple of oddities, plus the translation and unimap still. We also extend the console_lock in a couple of spots where coverage is wrong and switch vcs_open to use the right lock ! [Fixed the locking issue Jiri reported] Signed-off-by:
Alan Cox <alan@linux.intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Alan Cox authored
The font methods are console_lock covered. Unfortunately they don't extend the lock over all the needed tests. Signed-off-by:
Alan Cox <alan@linux.intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Dan Carpenter authored
TIOCSERGETLSR should be saved in a uint so the cast here to unsigned long is a bug. Reported-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Acked-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Cousson, Benoit authored
The following commit: be4b0281 (tty: serial: OMAP: block idle while the UART is transferring data in PIO mode), is introducing an oops if OMAP is booted using device tree blob because the pdata will not be initialized. Check if pdata is set before de-referencing it. Signed-off-by:
Benoit Cousson <b-cousson@ti.com> Reviewed-by:
Paul Walmsley <paul@pwsan.com> Cc: stable <stable@vger.kernel.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Alan Cox authored
Keyboard struct lifetime is easy, but the locking is not and is completely ignored by the existing code. Tackle this one head on - Make the kbd_table private so we can run down all direct users - Hoick the relevant ioctl handlers into the keyboard layer - Lock them with the keyboard lock so they don't change mid keypress - Add helpers for things like console stop/start so we isolate the poking around properly - Tweak the braille console so it still builds There are a couple of FIXME locking cases left for ioctls that are so hideous they should be addressed in a later patch. After this patch the kbd_table is private and all the keyboard jiggery pokery is in one place. This update fixes speakup and also a memory leak in the original. Signed-off-by:
Alan Cox <alan@linux.intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Greg Kroah-Hartman authored
This driver is broken, as reported by Jiri, and to quote Ben: Just remove the driver, I don't think anybody cares. so I'm doing just that here. Reported-by:
Jiri Slaby <jslaby@suse.cz> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Josh Boyer <jwboyer@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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- Feb 28, 2012
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Greg Kroah-Hartman authored
Reported-by:
Stephen Rothwell <sfr@canb.auug.org.au> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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- Feb 25, 2012
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Alan Cox authored
Signed-off-by:
Alan Cox <alan@linux.intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Alan Cox authored
First step to debletcherising the vt console layer - pick a victim and fix the locking This is a nice simple object with its own rules so lets pick it out for treatment. The user of the table already has a lock so we will also use the same lock for updates. Signed-off-by:
Alan Cox <alan@linux.intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Greg Kroah-Hartman authored
This reverts commit a50f724a . Sasha reported that this causes problems, so revert it. Cc: Alan Cox <alan@linux.intel.com> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Sasha Levin <levinsasha928@gmail.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Greg Kroah-Hartman authored
This reverts commit d3bda529 . Sasha reported that this causes problems, so revert it. Cc: Sasha Levin <levinsasha928@gmail.com> Cc: Jiri Slaby <jslaby@suse.cz> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Chanho Min authored
In DMA-operated uart, I found that rx data can be taken by the UART interrupts during the DMA irq handler. pl011_int is occurred just before it goes inside spin_lock_irq. When it returns to the callback, DMA buffer already has been flushed. Then, pl011_dma_rx_chars gets invalid data. So I add check for the residue as the patch bellow. Signed-off-by:
Chanho Min <chanho.min@lge.com> Acked-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Denis 'GNUtoo' Carikli authored
Without that fix machines having a s3c2442 CPU have something like that in dmesg: samsung-uart s3c2440-uart.0: could not find driver data samsung-uart s3c2440-uart.1: could not find driver data samsung-uart s3c2440-uart.2: could not find driver data And serial is never initialized. The previous log was obtained trough early printk on the gta02 machine. Signed-off-by:
Denis 'GNUtoo' Carikli <GNUtoo@no-log.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Stephen Rothwell authored
Fixes these build errors: ERROR: ".udbg_printf" [drivers/tty/ehv_bytechan.ko] undefined! ERROR: ".register_early_udbg_console" [drivers/tty/ehv_bytechan.ko] undefined! ERROR: "udbg_putc" [drivers/tty/ehv_bytechan.ko] undefined! Cc: Timur Tabi <timur@freescale.com> Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Cc: stable <stable@vger.kernel.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Masanari Iida authored
Correct spelling "receieve" to "receive" in drivers/tty/serial/sn_console.c Signed-off-by:
Masanari Iida <standby24x7@gmail.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Danny Kukawka authored
drivers/tty/serial/mux.c included 'linux/tty.h' twice, remove the duplicate. Signed-off-by:
Danny Kukawka <danny.kukawka@bisect.de> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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- Feb 11, 2012
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Paul Gortmaker authored
There are multiple users of this file from different source paths now, and rather than have ../ paths in include statements, just move the file to the linux header dir. Suggested-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Greg Kroah-Hartman authored
This is needed to handle the 8250 file merge mess properly for future patches. Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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- Feb 10, 2012
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/ttyLinus Torvalds authored
Serial/TTY fixes for the 3.3-rc3 tree Just a few new device ids, omap serial driver regression fixes, and a build fix for the 8250 driver movement. Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> * tag 'tty-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: tty: serial: omap-serial: wakeup latency constraint is in microseconds, not milliseconds tty: serial: OMAP: block idle while the UART is transferring data in PIO mode tty: serial: OMAP: use a 1-byte RX FIFO threshold in PIO mode m32r: relocate drivers back out of 8250 dir tty: fix a build failure on sparc serial: samsung: Add support for EXYNOS5250 serial: samsung: Add support for EXYNOS4212 and EXYNOS4412 drivers/tty/vt/vt_ioctl.c: fix KDFONTOP 32bit compatibility layer
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/stagingLinus Torvalds authored
Staging tree patches for 3.3-rc3 Big things here is the deletion of the Android pmem driver, as it's obsolete and no one uses it, the gma500 driver as it's already in the drm portion of the kernel tree, and the pohmelfs filesystem as it's obsolete and a rewritten version is being proposed for the fs/ section of the kernel. Other than that, a smattering of different bugfixes and regressions, and some omap drm api merge fixups that were needed due to api changes in the main portion of the drm tree, allowing this code to build properly again. Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> * tag 'staging-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (28 commits) staging: pohmelfs: remove drivers/staging/pohmelfs staging: android/ram_console: Don't build on arches w/o ioremap staging: r8712u: Use asynchronous firmware loading staging: usbip: fix to prevent potentially using uninitialized spinlock staging: r8712u: Fix problem when CONFIG_R8712_AP is set staging: tidspbridge: fix incorrect free to drv_datap staging: tidspbridge: fix bridge_open memory leaks staging: android: lowmemorykiller: Don't wait more than one second for a process to die MAINTAINERS: staging: iio: add iio information staging: zcache: fix serialization bug in zv stats staging: fix go7007-usb license Staging: android: binder: Fix crashes when sharing a binder file between processes Staging: android: Remove pmem driver Staging: asus_oled: fix NULL-ptr crash on unloading Staging: asus_oled: fix image processing Staging: android: binder: Don't call dump_stack in binder_vma_open staging: r8712u: Add new Sitecom UsB ID zcache: Set SWIZ_BITS to 8 to reduce tmem bucket lock contention. zcache: fix deadlock condition staging: drm/omap: fix locking issue ...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-coreLinus Torvalds authored
Driver core fixes for the 3.3-rc3 tree. A few fixes for kobject warnings that have popped up in the cpu hotplug path, and a regression fix for the speed of the hotplug memory code. Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> * tag 'driver-core-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: driver-core: cpu: fix kobject warning when hotplugging a cpu ACPI: remove duplicated lines of merging problems with acpi_processor_add docbook: fix fatal errors in device-drivers docbook and add DMA Management section drivers/base/memory.c: fix memory_dev_init() long delay driver core: cpu: remove kernel warning when removing a cpu
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-miscLinus Torvalds authored
Minor char-misc fixes for 3.3-rc3 Nothing big here, some Kconfig fixes for the MISC_DEVICES config option that was being used incorrectly, and some other minor bug fixes. Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> * tag 'char-misc-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: mmc: cb710 core: Add missing spin_lock_init for irq_lock of struct cb710_chip cs5535-mfgpt: don't call __init function from __devinit vmw_balloon: fix for a -Wuninitialized warning drivers: misc: Remove MISC_DEVICES config option c2port: fix build error for duramar2150 due to missing header.
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