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Subject[PATCH 03/10] irqchip/gic-v3-its: Split property table clearing from allocation
Date
As we're going to reuse some pre-allocated memory for the property
table, split out the zeroing of that table into a separate function
for later use.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/irqchip/irq-gic-v3-its.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index ed6aab11e019..7ef6baea2d78 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -1597,6 +1597,15 @@ static void its_lpi_free(unsigned long *bitmap, u32 base, u32 nr_ids)
kfree(bitmap);
}

+static void gic_reset_prop_table(void *va)
+{
+ /* Priority 0xa0, Group-1, disabled */
+ memset(va, LPI_PROP_DEFAULT_PRIO | LPI_PROP_GROUP1, LPI_PROPBASE_SZ);
+
+ /* Make sure the GIC will observe the written configuration */
+ gic_flush_dcache_to_poc(va, LPI_PROPBASE_SZ);
+}
+
static struct page *its_allocate_prop_table(gfp_t gfp_flags)
{
struct page *prop_page;
@@ -1605,13 +1614,7 @@ static struct page *its_allocate_prop_table(gfp_t gfp_flags)
if (!prop_page)
return NULL;

- /* Priority 0xa0, Group-1, disabled */
- memset(page_address(prop_page),
- LPI_PROP_DEFAULT_PRIO | LPI_PROP_GROUP1,
- LPI_PROPBASE_SZ);
-
- /* Make sure the GIC will observe the written configuration */
- gic_flush_dcache_to_poc(page_address(prop_page), LPI_PROPBASE_SZ);
+ gic_reset_prop_table(page_address(prop_page));

return prop_page;
}
--
2.18.0
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