ARM: PL08x: fix locking in tasklet

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Tasklets are run from an interruptible context.  The slave DMA functions
can be called from within IRQ handlers.  Taking the spinlock without
disabling interrupts allows an interrupt handler to run, which may try
to take the spinlock again, resulting in deadlock.  Fix this by using
the irqsave spinlocks.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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Russell King - ARM Linux 2011-01-03 22:31:24 +00:00 • committed by Dan Williams

parent 91aa5fadb8

commit bf072af461

1 changed files with 3 additions and 2 deletions

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drivers/dma/amba-pl08x.c

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