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Blackfin: portmux: fix peripheral map overflow when requesting pins 

Some processors have groups of pins that aren't an even number of 16.
This causes the array size calculation to under count the number of
needed entries due to integer truncation.  So on the BF51x, while we
should have 3 bitmaps (41 / 16), we end up with 2 and pin requests for
the 3rd bank end up scribbling over the top of the GPIO IRQ array.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Michael Hennerich 2010-07-13 08:26:10 +00:00 committed by Mike Frysinger
parent 3322c7bbf6
commit 382dbe5b39
1 changed files with 1 additions and 1 deletions
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2
arch/blackfin/kernel/bfin_gpio.c
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@ -157,7 +157,7 @@ static int cmp_label(unsigned short ident, const char *label)
#define DECLARE_RESERVED_MAP(m, c) static unsigned short reserved_##m##_map[c]
DECLARE_RESERVED_MAP(gpio, GPIO_BANK_NUM);
DECLARE_RESERVED_MAP(peri, gpio_bank(MAX_RESOURCES));
DECLARE_RESERVED_MAP(peri, DIV_ROUND_UP(MAX_RESOURCES, GPIO_BANKSIZE));
DECLARE_RESERVED_MAP(gpio_irq, GPIO_BANK_NUM);
inline int check_gpio(unsigned gpio)