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Message-Id: <6896e711ea8ffe8d4e636a0d014f5f53b2813c8c.1508368279.git.sathyanarayanan.kuppuswamy@linux.intel.com>
Date: Wed, 18 Oct 2017 17:23:05 -0700
From: sathyanarayanan.kuppuswamy@...ux.intel.com
To: a.zummo@...ertech.it, x86@...nel.org, wim@...ana.be,
mingo@...hat.com, alexandre.belloni@...e-electrons.com,
qipeng.zha@...el.com, hpa@...or.com, dvhart@...radead.org,
tglx@...utronix.de, lee.jones@...aro.org, andy@...radead.org,
souvik.k.chakravarty@...el.com
Cc: linux-rtc@...r.kernel.org, linux-watchdog@...r.kernel.org,
linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
sathyaosid@...il.com,
Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@...ux.intel.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [RFC v6 2/9] platform/x86: intel_pmc_ipc: Use devm_* calls in driver probe function
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
This patch cleans up unnecessary free/alloc calls in ipc_plat_probe(),
ipc_pci_probe() and ipc_plat_get_res() functions by using devm_*
calls.
This patch also adds proper error handling for failure cases in
ipc_pci_probe() function.
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
[andy: fixed style issues, missed devm_free_irq(), removed unnecessary log message]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
drivers/platform/x86/intel_pmc_ipc.c | 96 +++++++++++-------------------------
1 file changed, 29 insertions(+), 67 deletions(-)
diff --git a/drivers/platform/x86/intel_pmc_ipc.c b/drivers/platform/x86/intel_pmc_ipc.c
index af88221..eadd1a1 100644
--- a/drivers/platform/x86/intel_pmc_ipc.c
+++ b/drivers/platform/x86/intel_pmc_ipc.c
@@ -482,54 +482,41 @@ static irqreturn_t ioc(int irq, void *dev_id)
static int ipc_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
- resource_size_t pci_resource;
+ struct intel_pmc_ipc_dev *pmc = &ipcdev;
int ret;
- int len;
- ipcdev.dev = &pci_dev_get(pdev)->dev;
- ipcdev.irq_mode = IPC_TRIGGER_MODE_IRQ;
+ /* Only one PMC is supported */
+ if (pmc->dev)
+ return -EBUSY;
- spin_lock_init(&ipcdev.gcr_lock);
+ spin_lock_init(&pmc->gcr_lock);
+
+ pmc->irq_mode = IPC_TRIGGER_MODE_IRQ;
- ret = pci_enable_device(pdev);
+ ret = pcim_enable_device(pdev);
if (ret)
return ret;
- ret = pci_request_regions(pdev, "intel_pmc_ipc");
+ ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
if (ret)
return ret;
- pci_resource = pci_resource_start(pdev, 0);
- len = pci_resource_len(pdev, 0);
- if (!pci_resource || !len) {
- dev_err(&pdev->dev, "Failed to get resource\n");
- return -ENOMEM;
- }
+ init_completion(&pmc->cmd_complete);
- init_completion(&ipcdev.cmd_complete);
+ pmc->ipc_base = pcim_iomap_table(pdev)[0];
- if (request_irq(pdev->irq, ioc, 0, "intel_pmc_ipc", &ipcdev)) {
+ ret = devm_request_irq(&pdev->dev, pdev->irq, ioc, 0, "intel_pmc_ipc",
+ pmc);
+ if (ret) {
dev_err(&pdev->dev, "Failed to request irq\n");
- return -EBUSY;
+ return ret;
}
- ipcdev.ipc_base = ioremap_nocache(pci_resource, len);
- if (!ipcdev.ipc_base) {
- dev_err(&pdev->dev, "Failed to ioremap ipc base\n");
- free_irq(pdev->irq, &ipcdev);
- ret = -ENOMEM;
- }
+ pmc->dev = &pdev->dev;
- return ret;
-}
+ pci_set_drvdata(pdev, pmc);
-static void ipc_pci_remove(struct pci_dev *pdev)
-{
- free_irq(pdev->irq, &ipcdev);
- pci_release_regions(pdev);
- pci_dev_put(pdev);
- iounmap(ipcdev.ipc_base);
- ipcdev.dev = NULL;
+ return 0;
}
static const struct pci_device_id ipc_pci_ids[] = {
@@ -544,7 +531,6 @@ static struct pci_driver ipc_pci_driver = {
.name = "intel_pmc_ipc",
.id_table = ipc_pci_ids,
.probe = ipc_pci_probe,
- .remove = ipc_pci_remove,
};
static ssize_t intel_pmc_ipc_simple_cmd_store(struct device *dev,
@@ -854,17 +840,12 @@ static int ipc_plat_get_res(struct platform_device *pdev)
return -ENXIO;
}
size = PLAT_RESOURCE_IPC_SIZE + PLAT_RESOURCE_GCR_SIZE;
+ res->end = res->start + size - 1;
+
+ addr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(addr))
+ return PTR_ERR(addr);
- if (!request_mem_region(res->start, size, pdev->name)) {
- dev_err(&pdev->dev, "Failed to request ipc resource\n");
- return -EBUSY;
- }
- addr = ioremap_nocache(res->start, size);
- if (!addr) {
- dev_err(&pdev->dev, "I/O memory remapping failed\n");
- release_mem_region(res->start, size);
- return -ENOMEM;
- }
ipcdev.ipc_base = addr;
ipcdev.gcr_mem_base = addr + PLAT_RESOURCE_GCR_OFFSET;
@@ -921,7 +902,6 @@ MODULE_DEVICE_TABLE(acpi, ipc_acpi_ids);
static int ipc_plat_probe(struct platform_device *pdev)
{
- struct resource *res;
int ret;
ipcdev.dev = &pdev->dev;
@@ -945,11 +925,11 @@ static int ipc_plat_probe(struct platform_device *pdev)
ret = ipc_create_pmc_devices();
if (ret) {
dev_err(&pdev->dev, "Failed to create pmc devices\n");
- goto err_device;
+ return ret;
}
- if (request_irq(ipcdev.irq, ioc, IRQF_NO_SUSPEND,
- "intel_pmc_ipc", &ipcdev)) {
+ if (devm_request_irq(&pdev->dev, ipcdev.irq, ioc, IRQF_NO_SUSPEND,
+ "intel_pmc_ipc", &ipcdev)) {
dev_err(&pdev->dev, "Failed to request irq\n");
ret = -EBUSY;
goto err_irq;
@@ -966,40 +946,22 @@ static int ipc_plat_probe(struct platform_device *pdev)
return 0;
err_sys:
- free_irq(ipcdev.irq, &ipcdev);
+ devm_free_irq(&pdev->dev, ipcdev.irq, &ipcdev);
err_irq:
platform_device_unregister(ipcdev.tco_dev);
platform_device_unregister(ipcdev.punit_dev);
platform_device_unregister(ipcdev.telemetry_dev);
-err_device:
- iounmap(ipcdev.ipc_base);
- res = platform_get_resource(pdev, IORESOURCE_MEM,
- PLAT_RESOURCE_IPC_INDEX);
- if (res) {
- release_mem_region(res->start,
- PLAT_RESOURCE_IPC_SIZE +
- PLAT_RESOURCE_GCR_SIZE);
- }
+
return ret;
}
static int ipc_plat_remove(struct platform_device *pdev)
{
- struct resource *res;
-
sysfs_remove_group(&pdev->dev.kobj, &intel_ipc_group);
- free_irq(ipcdev.irq, &ipcdev);
+ devm_free_irq(&pdev->dev, ipcdev.irq, &ipcdev);
platform_device_unregister(ipcdev.tco_dev);
platform_device_unregister(ipcdev.punit_dev);
platform_device_unregister(ipcdev.telemetry_dev);
- iounmap(ipcdev.ipc_base);
- res = platform_get_resource(pdev, IORESOURCE_MEM,
- PLAT_RESOURCE_IPC_INDEX);
- if (res) {
- release_mem_region(res->start,
- PLAT_RESOURCE_IPC_SIZE +
- PLAT_RESOURCE_GCR_SIZE);
- }
ipcdev.dev = NULL;
return 0;
}
--
2.7.4
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