talos-op-linux/drivers/char/mwave, branch v2.6.36-rc5

mwave: fix read buffer overflow

2009-09-24T14:21:03+00:00

Check whether index is within bounds before grabbing the element. Signed-off-by: Roel Kluin Cc: Kay Sievers Cc: Greg Kroah-Hartman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mwave: struct device - replace bus_id with dev_name(), dev_set_name()

2009-01-06T18:44:38+00:00

Signed-off-by: Kay Sievers Signed-off-by: Greg Kroah-Hartman

mwave: ioctl BKL pushdown

2008-07-25T17:53:43+00:00

Push the BKL down to the point it wraps the actual mwave method handlers Signed-off-by: Alan Cox Cc: Eric Sesterhenn Cc: Yani Ioannou Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

proper extern for mwave_s_mdd

2008-07-25T17:53:42+00:00

This patch adds a proper extern for mwave_s_mdd in drivers/char/mwave/mwavedd.h Signed-off-by: Adrian Bunk Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mwave-mwavedd: BKL pushdown

2008-07-02T21:06:23+00:00

Signed-off-by: Arnd Bergmann

arm/mach-integrator/time.c, mwave: revert portions of recent irq cleanups

2008-04-24T12:35:37+00:00

The recent irq cleanups for arch/arm/mach-integrator/time.c and drivers/char/mwave/tp3780i.c changed the request_irq() dev_id parameter, but neglected to change the matching free_irq() parameter, thus creating a bug upon irq de-registration. Given that the impetus for the changes is not yet accepted upstream, it is best to revert the irq cleanups. Mostly. A comment is added to time.c to reduce future confusion, of type that led to my time.c cleanup in the first place. Signed-off-by: Jeff Garzik

drivers/char: minor irq handler cleanups

2008-04-20T23:03:43+00:00

- remove always-false tests - don't overload 'irq' argument, pass data properly via dev_id - remove pointless casts from void* Signed-off-by: Jeff Garzik

[PATCH] mwave: interesting flags savings

2007-02-21T01:10:14+00:00

Flags from spin_lock_irqsave() are saved into global variable and restored from it. My gut feeling this is very racy. Signed-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

IRQ: Maintain regs pointer globally rather than passing to IRQ handlers

2006-10-05T14:10:12+00:00

Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)

remove mentionings of devfs in documentation

2006-10-03T20:17:48+00:00

Now that devfs is removed, there's no longer any need to document how to do this or that with devfs. This patch includes some improvements by Joe Perches. Signed-off-by: Adrian Bunk