Eric Lee / linux-smarc-t335x-v3.2

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Commit 382dbe5b39a4efa6fdb3e5093e5d0bdbb5c5301f

Authored by Michael Hennerich
Committed by Mike Frysinger
1 parent 3322c7bbf6
Exists in master and in 4 other branches v3.2_AM335xPSP_04.06.00.11, v3.2_NEWT335xPSP_04.06.00.11, v3.2_SBC_SMARTMEN, v3.2_SMARCT335xPSP_04.06.00.11

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>

Showing 1 changed file with 1 additions and 1 deletions Side-by-side Diff

arch/blackfin/kernel/bfin_gpio.c
Diff comments   View file @ 382dbe5
... ... @@ -157,7 +157,7 @@
157 157 #define DECLARE_RESERVED_MAP(m, c) static unsigned short reserved_##m##_map[c]
158 158  
159 159 DECLARE_RESERVED_MAP(gpio, GPIO_BANK_NUM);
160   -DECLARE_RESERVED_MAP(peri, gpio_bank(MAX_RESOURCES));
  160 +DECLARE_RESERVED_MAP(peri, DIV_ROUND_UP(MAX_RESOURCES, GPIO_BANKSIZE));
161 161 DECLARE_RESERVED_MAP(gpio_irq, GPIO_BANK_NUM);
162 162  
163 163 inline int check_gpio(unsigned gpio)