- 08 Mar, 2012 35 commits
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Jiri Slaby authored
tty_wakeup is safe to be called from all contexts. No need to schedule a tasklet for that. Let's call it directly like in other drivers. This allows us to kill another member of async_struct structure. (If we remove the dummy uses in simserial.) Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiri Slaby authored
First, remove unused macro and rs_multiport_struct structure. Nobody uses them at all. Further, the 2 drivers (they are below) which use the rest of structures from serialP.h (async_struct and serial_state) do not use all the members. Remove the members: * which are unused or * which are only initialized and never used for something real. Everybody should avoid the structures with a looong distance. Finally, remove the ALPHA kludge MCR quirks. They are 1:1 copy from 8250.h. No need to redefine them here. The 2 promised users of the structures: arch/ia64/hp/sim/simserial.c drivers/tty/amiserial.c Signed-off-by:
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Jiri Slaby authored
The structures there are going away. And speakup has enough troubles already. So define a structure similar to what 8250 does: old_serial_port. There define an array of speed, port base and so on needed for configuration. Then use this structure instead of serial_state defined in serialP.h. Signed-off-by:
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Jiri Slaby authored
All of them do not use the ugly interface defined in that header. Signed-off-by:
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Jiri Slaby authored
It uses pointers to pci_dev, but compiler complains it doesn't know it: In file included from .../m32r_sio.c:53: .../m32r_sio.h:21: warning: "struct pci_dev" declared inside parameter list .../m32r_sio.h:21: warning: its scope is only this definition or declaration, which is probably not what you want .../m32r_sio.h:22: warning: "struct pci_dev" declared inside parameter list Signed-off-by:
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Jiri Slaby authored
We want to know the value of the atomic variable in intr_connect after the increment. But atomic_inc doesn't, per definition, return the value. It is just a pure coincidence that ia64 defines atomic_inc as atomic_inc_return. So fix this mistake by using atomic_inc_return properly. Signed-off-by:
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Jiri Slaby authored
Even though the port is not used for anything real there yet, this will change as tty buffers will be in tty_port in the near future. So the port will be needed in all drivers. Signed-off-by:
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Jiri Slaby authored
If the timer ticks while we are holding the spinlock, the system deadlocks. It is due to synchronous del_timer. So to fix that, use spinlocks that properly disable bottom halves. Signed-off-by:
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Jiri Slaby authored
Use setup_timer instead of explicit assignments. Signed-off-by:
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Jiri Slaby authored
Again, no need to do that from the pci probe function. Hmm, I noticed this driver is marked as BROKEN. Won't touch it more, it has to be converted to dynamic tty driver allocation first. Perhaps it is time to move it to staging? Signed-off-by:
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Jiri Slaby authored
They are in .bss which is initialized to zeros when the module is loaded/kernel booted. What a strange way to do the initialization once in the pci probe routine... Signed-off-by:
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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 Kosina <jkosina@suse.cz> Cc: David Sterba <dsterba@suse.cz> Signed-off-by:
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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:
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Jiri Slaby authored
The macro is always defined now. This was there only for historical reasons. Signed-off-by:
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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:
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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:
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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:
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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:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Jiri Slaby authored
By using ASYNC_SPD_MASK instead of the single speed bits. Signed-off-by:
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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 authored
Remove the useless local variable and return the value itself. Signed-off-by:
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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:
Tilman Schmidt <tilman@imap.cc> Signed-off-by:
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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:
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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:
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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:
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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:
Oliver Neukum <oneukum@suse.de> Acked-by:
Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
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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:
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Alan Cox authored
Signed-off-by:
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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:
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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:
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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:
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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:
Dan Carpenter <dan.carpenter@oracle.com> Acked-by:
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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:
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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:
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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:
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- 27 Feb, 2012 1 commit
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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:
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- 24 Feb, 2012 4 commits
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Alan Cox authored
Signed-off-by:
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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:
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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:
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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:
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