[tip:irq/urgent] irqchip/mbigen: Fix memory mapping code

tip-bot for Hanjun Guo
2017-05-12T08:36:58Z

Commit-ID: 5ba9b0a14132d0b8d97affe909f324045a968d03
Gitweb: http://git.kernel.org/tip/5ba9b0a14132d0b8d97affe909f324045a968d03
Author: Hanjun Guo <hanjun.guo@linaro.org>
AuthorDate: Fri, 12 May 2017 11:55:26 +0800
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Fri, 12 May 2017 10:25:37 +0200

irqchip/mbigen: Fix memory mapping code

Some mbigens share memory regions, and devm_ioremap_resource
does not allow to share resources which will break the probe
of mbigen, in opposition to devm_ioremap.

This patch restores back usage of devm_ioremap function, but
with proper error handling and logging.

Fixes: 216646e4d82e ("irqchip/mbigen: Fix return value check in mbigen_device_probe()")
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: linuxarm@huawei.com
Cc: Wei Yongjun <weiyongjun1@huawei.com>
Cc: MaJun <majun258@huawei.com>
Link: http://lkml.kernel.org/r/1494561328-39514-2-git-send-email-guohanjun@huawei.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
drivers/irqchip/irq-mbigen.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/irqchip/irq-mbigen.c b/drivers/irqchip/irq-mbigen.c
index d2306c8..0f5e66e 100644
--- a/drivers/irqchip/irq-mbigen.c
+++ b/drivers/irqchip/irq-mbigen.c
@@ -337,9 +337,12 @@ static int mbigen_device_probe(struct platform_device *pdev)
mgn_chip->pdev = pdev;

res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- mgn_chip->base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(mgn_chip->base))
- return PTR_ERR(mgn_chip->base);
+ mgn_chip->base = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (!mgn_chip->base) {
+ dev_err(&pdev->dev, "failed to ioremap %pR\n", res);
+ return -ENOMEM;
+ }

if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node)
err = mbigen_of_create_domain(pdev, mgn_chip);