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authorDavid Daney <david.daney@cavium.com>2016-02-09 11:00:06 -0800
committerRalf Baechle <ralf@linux-mips.org>2016-05-13 14:01:39 +0200
commit2253e0b9d991e82210dd08c89bf91584ad25f993 (patch)
treeed586e5f383c4bd2dc8a731cdcf80028f2dee2af
parent7d52ab163c75bb830185f7ea12bae1db87f12b56 (diff)
MIPS: OCTEON: Remove some code limiting NR_IRQS to 255
Follow-on patches for OCTEON III will increase the number of irqs to potentially more than 256. Increase the width of the octeon_irq_ciu_to_irq to int to be able to handle this case. Remove the hacky code that verified that u8 would not be overflowed. Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/12495/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
-rw-r--r--arch/mips/cavium-octeon/octeon-irq.c27
1 files changed, 2 insertions, 25 deletions
diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c
index 4f9eb0576884..bc30d3a90b2f 100644
--- a/arch/mips/cavium-octeon/octeon-irq.c
+++ b/arch/mips/cavium-octeon/octeon-irq.c
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2004-2014 Cavium, Inc.
+ * Copyright (C) 2004-2016 Cavium, Inc.
*/
#include <linux/of_address.h>
@@ -28,7 +28,7 @@ struct octeon_irq_ciu_domain_data {
int num_sum; /* number of sum registers (2 or 3). */
};
-static __read_mostly u8 octeon_irq_ciu_to_irq[8][64];
+static __read_mostly int octeon_irq_ciu_to_irq[8][64];
struct octeon_ciu_chip_data {
union {
@@ -1158,16 +1158,6 @@ static struct irq_chip *octeon_irq_ciu_chip;
static struct irq_chip *octeon_irq_ciu_chip_edge;
static struct irq_chip *octeon_irq_gpio_chip;
-static bool octeon_irq_virq_in_range(unsigned int virq)
-{
- /* We cannot let it overflow the mapping array. */
- if (virq < (1ul << 8 * sizeof(octeon_irq_ciu_to_irq[0][0])))
- return true;
-
- WARN_ONCE(true, "virq out of range %u.\n", virq);
- return false;
-}
-
static int octeon_irq_ciu_map(struct irq_domain *d,
unsigned int virq, irq_hw_number_t hw)
{
@@ -1176,13 +1166,6 @@ static int octeon_irq_ciu_map(struct irq_domain *d,
unsigned int bit = hw & 63;
struct octeon_irq_ciu_domain_data *dd = d->host_data;
- if (!octeon_irq_virq_in_range(virq))
- return -EINVAL;
-
- /* Don't map irq if it is reserved for GPIO. */
- if (line == 0 && bit >= 16 && bit <32)
- return 0;
-
if (line >= dd->num_sum || octeon_irq_ciu_to_irq[line][bit] != 0)
return -EINVAL;
@@ -1215,9 +1198,6 @@ static int octeon_irq_gpio_map(struct irq_domain *d,
unsigned int line, bit;
int r;
- if (!octeon_irq_virq_in_range(virq))
- return -EINVAL;
-
line = (hw + gpiod->base_hwirq) >> 6;
bit = (hw + gpiod->base_hwirq) & 63;
if (line > ARRAY_SIZE(octeon_irq_ciu_to_irq) ||
@@ -1899,9 +1879,6 @@ static int octeon_irq_ciu2_map(struct irq_domain *d,
unsigned int line = hw >> 6;
unsigned int bit = hw & 63;
- if (!octeon_irq_virq_in_range(virq))
- return -EINVAL;
-
/*
* Don't map irq if it is reserved for GPIO.
* (Line 7 are the GPIO lines.)