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pcie-gadget-spear: use devm_ functions

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The various devm_ functions allocate memory that is released when a
driver detaches. This patch uses these functions for data that is
allocated in the probe function of a platform device and is only freed
in the remove function. Also, the unnecessary labels are removed and
linux/device.h is added to make sure the devm_*() routine declarations
are unambiguously available.

The initial call to platform_get_resource is moved down to the
introduced call to devm_ioremap_resource that uses its result.

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Himangi Saraogi 2014-08-07 17:43:28 +05:30 committed by Greg Kroah-Hartman
parent 322d3f6a58
commit 759e7d6df3
1 changed files with 23 additions and 75 deletions
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98
drivers/misc/spear13xx_pcie_gadget.c
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@ -9,6 +9,7 @@
* warranty of any kind, whether express or implied.
*/
#include <linux/device.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/delay.h>
@ -743,58 +744,33 @@ static int spear_pcie_gadget_probe(struct platform_device *pdev)
struct config_item *cg_item;
struct configfs_subsystem *subsys;
/* get resource for application registers*/
res0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res0) {
dev_err(&pdev->dev, "no resource defined\n");
return -EBUSY;
}
if (!request_mem_region(res0->start, resource_size(res0),
pdev->name)) {
dev_err(&pdev->dev, "pcie gadget region already claimed\n");
return -EBUSY;
}
/* get resource for dbi registers*/
res1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!res1) {
dev_err(&pdev->dev, "no resource defined\n");
goto err_rel_res0;
}
if (!request_mem_region(res1->start, resource_size(res1),
pdev->name)) {
dev_err(&pdev->dev, "pcie gadget region already claimed\n");
goto err_rel_res0;
}
target = kzalloc(sizeof(*target), GFP_KERNEL);
target = devm_kzalloc(&pdev->dev, sizeof(*target), GFP_KERNEL);
if (!target) {
dev_err(&pdev->dev, "out of memory\n");
status = -ENOMEM;
goto err_rel_res;
return -ENOMEM;
}
cg_item = &target->subsys.su_group.cg_item;
sprintf(cg_item->ci_namebuf, "pcie_gadget.%d", pdev->id);
cg_item->ci_type = &pcie_gadget_target_type;
config = &target->config;
config->va_app_base = (void __iomem *)ioremap(res0->start,
resource_size(res0));
if (!config->va_app_base) {
/* get resource for application registers*/
res0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
config->va_app_base = devm_ioremap_resource(&pdev->dev, res0);
if (IS_ERR(config->va_app_base)) {
dev_err(&pdev->dev, "ioremap fail\n");
status = -ENOMEM;
goto err_kzalloc;
return PTR_ERR(config->va_app_base);
}
/* get resource for dbi registers*/
res1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
config->base = (void __iomem *)res1->start;
config->va_dbi_base = (void __iomem *)ioremap(res1->start,
resource_size(res1));
if (!config->va_dbi_base) {
config->va_dbi_base = devm_ioremap_resource(&pdev->dev, res1);
if (IS_ERR(config->va_dbi_base)) {
dev_err(&pdev->dev, "ioremap fail\n");
status = -ENOMEM;
goto err_iounmap_app;
return PTR_ERR(config->va_dbi_base);
}
platform_set_drvdata(pdev, target);
@ -802,15 +778,15 @@ static int spear_pcie_gadget_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "no update irq?\n");
status = irq;
goto err_iounmap;
return irq;
}
status = request_irq(irq, spear_pcie_gadget_irq, 0, pdev->name, NULL);
status = devm_request_irq(&pdev->dev, irq, spear_pcie_gadget_irq,
0, pdev->name, NULL);
if (status) {
dev_err(&pdev->dev,
"pcie gadget interrupt IRQ%d already claimed\n", irq);
goto err_iounmap;
return status;
}
/* Register configfs hooks */
@ -819,7 +795,7 @@ static int spear_pcie_gadget_probe(struct platform_device *pdev)
mutex_init(&subsys->su_mutex);
status = configfs_register_subsystem(subsys);
if (status)
goto err_irq;
return status;
/*
* init basic pcie application registers
@ -835,13 +811,12 @@ static int spear_pcie_gadget_probe(struct platform_device *pdev)
clk = clk_get_sys("pcie1", NULL);
if (IS_ERR(clk)) {
pr_err("%s:couldn't get clk for pcie1\n", __func__);
status = PTR_ERR(clk);
goto err_irq;
return PTR_ERR(clk);
}
status = clk_enable(clk);
if (status) {
pr_err("%s:couldn't enable clk for pcie1\n", __func__);
goto err_irq;
return status;
}
} else if (pdev->id == 2) {
/*
@ -851,53 +826,26 @@ static int spear_pcie_gadget_probe(struct platform_device *pdev)
clk = clk_get_sys("pcie2", NULL);
if (IS_ERR(clk)) {
pr_err("%s:couldn't get clk for pcie2\n", __func__);
status = PTR_ERR(clk);
goto err_irq;
return PTR_ERR(clk);
}
status = clk_enable(clk);
if (status) {
pr_err("%s:couldn't enable clk for pcie2\n", __func__);
goto err_irq;
return status;
}
}
spear13xx_pcie_device_init(config);
return 0;
err_irq:
free_irq(irq, NULL);
err_iounmap:
iounmap(config->va_dbi_base);
err_iounmap_app:
iounmap(config->va_app_base);
err_kzalloc:
kfree(target);
err_rel_res:
release_mem_region(res1->start, resource_size(res1));
err_rel_res0:
release_mem_region(res0->start, resource_size(res0));
return status;
}
static int spear_pcie_gadget_remove(struct platform_device *pdev)
{
struct resource *res0, *res1;
static struct pcie_gadget_target *target;
struct spear_pcie_gadget_config *config;
int irq;
res0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
res1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
irq = platform_get_irq(pdev, 0);
target = platform_get_drvdata(pdev);
config = &target->config;
free_irq(irq, NULL);
iounmap(config->va_dbi_base);
iounmap(config->va_app_base);
release_mem_region(res1->start, resource_size(res1));
release_mem_region(res0->start, resource_size(res0));
configfs_unregister_subsystem(&target->subsys);
kfree(target);
return 0;
}