[PATCH v3 19/37] ARM: davinci: aintc: request memory region before remapping it

Bartosz Golaszewski
2019-02-12T10:39:25Z

Add a missing call to request_mem_region() before calling ioremap() to
make sure the region is not being used by anyone else.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
arch/arm/mach-davinci/irq.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/arch/arm/mach-davinci/irq.c b/arch/arm/mach-davinci/irq.c
index 2afaf19dc46c..2b6943731af9 100644
--- a/arch/arm/mach-davinci/irq.c
+++ b/arch/arm/mach-davinci/irq.c
@@ -86,9 +86,18 @@ davinci_aintc_handle_irq(struct pt_regs *regs)
void __init davinci_aintc_init(const struct davinci_aintc_config *config)
{
unsigned int irq_off, reg_off, prio, shift;
+ void __iomem *req;
int ret, irq_base;
const u8 *prios;

+ req = request_mem_region(config->reg.start,
+ resource_size(&config->reg),
+ "davinci-cp-intc");
+ if (!req) {
+ pr_err("%s: register range busy\n", __func__);
+ return;
+ }
+
davinci_aintc_base = ioremap(config->reg.start,
resource_size(&config->reg));
if (!davinci_aintc_base) {
--
2.20.1