Hi Murali,
On Mon, Apr 11, 2016 at 10:50:31AM -0400, Murali Karicheri wrote:
> Fix the misuse of goto statement in ks_pcie_get_irq_controller_info()
> as simple return is more appropriate for this function. While at
> it add an error log for absence of interrupt controller node.
>
> Signed-off-by: Murali Karicheri <m-karicheri2@xxxxxx>
> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> Cc: Pawel Moll <pawel.moll@xxxxxxx>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
> Cc: Kumar Gala <galak@xxxxxxxxxxxxxx>
> Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
>
> ---
> v2 - removed an unnecessary extra line added in the previous version
> v1 - same as before initial version
> drivers/pci/host/pci-keystone.c | 9 +++++----
> 1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/pci/host/pci-keystone.c b/drivers/pci/host/pci-keystone.c
> index 299f2f0..0234828 100644
> --- a/drivers/pci/host/pci-keystone.c
> +++ b/drivers/pci/host/pci-keystone.c
> @@ -181,11 +181,13 @@ static int ks_pcie_get_irq_controller_info(struct keystone_pcie *ks_pcie,
> *np_temp = of_find_node_by_name(np_pcie, controller);
> if (!(*np_temp)) {
> dev_err(dev, "Node for %s is absent\n", controller);
> - goto out;
> + return ret;
> }
> temp = of_irq_count(*np_temp);
> - if (!temp)
> - goto out;
> + if (!temp) {
> + dev_err(dev, "No entries in %s\n", controller);
> + return ret;
> + }
> if (temp > max_host_irqs)
> dev_warn(dev, "Too many %s interrupts defined %u\n",
> (legacy ? "legacy" : "MSI"), temp);
> @@ -203,7 +205,6 @@ static int ks_pcie_get_irq_controller_info(struct keystone_pcie *ks_pcie,
> *num_irqs = temp;
> ret = 0;
> }
> -out:
> return ret;
I really like these cleanups; thanks for doing them.
I went a step further because I think we always know the value of
"ret" at each of these places, so I inserted those and dropped "ret"
altogether.
I applied the patch below to pci/host-keystone for v4.7.
commit a7ed67a22484f70b8d0c33c76ad7faeac97222a7
Author: Murali Karicheri <m-karicheri2@xxxxxx>
Date: Mon Apr 11 10:50:31 2016 -0400
PCI: keystone: Remove unnecessary goto statement
Fix the misuse of goto statement in ks_pcie_get_irq_controller_info() as
simple return is more appropriate for this function. While at it add an
error log for absence of interrupt controller node.
[bhelgaas: drop "ret" altogether since we always know the return value]
Signed-off-by: Murali Karicheri <m-karicheri2@xxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
CC: Rob Herring <robh+dt@xxxxxxxxxx>
CC: Pawel Moll <pawel.moll@xxxxxxx>
CC: Mark Rutland <mark.rutland@xxxxxxx>
CC: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
CC: Kumar Gala <galak@xxxxxxxxxxxxxx>
diff --git a/drivers/pci/host/pci-keystone.c b/drivers/pci/host/pci-keystone.c
index 6868918..95a66f77 100644
--- a/drivers/pci/host/pci-keystone.c
+++ b/drivers/pci/host/pci-keystone.c
@@ -160,7 +160,7 @@ static void ks_pcie_legacy_irq_handler(struct irq_desc *desc)
static int ks_pcie_get_irq_controller_info(struct keystone_pcie *ks_pcie,
char *controller, int *num_irqs)
{
- int temp, max_host_irqs, legacy = 1, *host_irqs, ret = -EINVAL;
+ int temp, max_host_irqs, legacy = 1, *host_irqs;
struct device *dev = ks_pcie->pp.dev;
struct device_node *np_pcie = dev->of_node, **np_temp;
@@ -181,11 +181,15 @@ static int ks_pcie_get_irq_controller_info(struct keystone_pcie *ks_pcie,
*np_temp = of_find_node_by_name(np_pcie, controller);
if (!(*np_temp)) {
dev_err(dev, "Node for %s is absent\n", controller);
- goto out;
+ return -EINVAL;
}
+
temp = of_irq_count(*np_temp);
- if (!temp)
- goto out;
+ if (!temp) {
+ dev_err(dev, "No IRQ entries in %s\n", controller);
+ return -EINVAL;
+ }
+
if (temp > max_host_irqs)
dev_warn(dev, "Too many %s interrupts defined %u\n",
(legacy ? "legacy" : "MSI"), temp);
@@ -199,12 +203,13 @@ static int ks_pcie_get_irq_controller_info(struct keystone_pcie *ks_pcie,
if (!host_irqs[temp])
break;
}
+
if (temp) {
*num_irqs = temp;
- ret = 0;
+ return 0;
}
-out:
- return ret;
+
+ return -EINVAL;
}
static void ks_pcie_setup_interrupts(struct keystone_pcie *ks_pcie)
@@ -345,7 +350,7 @@ static int __init ks_add_pcie_port(struct keystone_pcie *ks_pcie,
return ret;
}
- return ret;
+ return 0;
}
static const struct of_device_id ks_pcie_of_match[] = {
@@ -374,7 +379,7 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
struct resource *res;
void __iomem *reg_p;
struct phy *phy;
- int ret = 0;
+ int ret;
ks_pcie = devm_kzalloc(&pdev->dev, sizeof(*ks_pcie),
GFP_KERNEL);
--
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