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staging: axis-fifo: request resources using managed functions

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Request device's resources (memory, interrupt...) using managed
function.

Signed-off-by: Quentin Deslandes <quentin.deslandes@itdev.co.uk>
Link: https://lore.kernel.org/r/20191101214232.16960-3-quentin.deslandes@itdev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Quentin Deslandes 2019-11-01 21:42:54 +00:00 committed by Greg Kroah-Hartman
parent ed6daf2b28
commit 6a20d283ed
1 changed files with 12 additions and 31 deletions
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43
drivers/staging/axis-fifo/axis-fifo.c
View file

@ -809,24 +809,13 @@ static int axis_fifo_probe(struct platform_device *pdev)
fifo->mem = r_mem;
/* request physical memory */
if (!request_mem_region(fifo->mem->start, resource_size(fifo->mem),
DRIVER_NAME)) {
dev_err(fifo->dt_device,
"couldn't lock memory region at 0x%pa\n",
&fifo->mem->start);
rc = -EBUSY;
fifo->base_addr = devm_ioremap_resource(fifo->dt_device, fifo->mem);
if (IS_ERR(fifo->base_addr)) {
rc = PTR_ERR(fifo->base_addr);
dev_err(fifo->dt_device, "can't remap IO resource (%d)\n", rc);
goto err_initial;
}
dev_dbg(fifo->dt_device, "got memory location [0x%pa - 0x%pa]\n",
&fifo->mem->start, &fifo->mem->end);
/* map physical memory to kernel virtual address space */
fifo->base_addr = ioremap(fifo->mem->start, resource_size(fifo->mem));
if (!fifo->base_addr) {
dev_err(fifo->dt_device, "couldn't map physical memory\n");
rc = -ENOMEM;
goto err_mem;
}
dev_dbg(fifo->dt_device, "remapped memory to 0x%p\n", fifo->base_addr);
/* create unique device name */
@ -842,7 +831,7 @@ static int axis_fifo_probe(struct platform_device *pdev)
rc = axis_fifo_parse_dt(fifo);
if (rc)
goto err_unmap;
goto err_initial;
reset_ip_core(fifo);
@ -857,16 +846,17 @@ static int axis_fifo_probe(struct platform_device *pdev)
dev_err(fifo->dt_device, "no IRQ found for 0x%pa\n",
&fifo->mem->start);
rc = -EIO;
goto err_unmap;
goto err_initial;
}
/* request IRQ */
fifo->irq = r_irq->start;
rc = request_irq(fifo->irq, &axis_fifo_irq, 0, DRIVER_NAME, fifo);
rc = devm_request_irq(fifo->dt_device, fifo->irq, &axis_fifo_irq, 0,
DRIVER_NAME, fifo);
if (rc) {
dev_err(fifo->dt_device, "couldn't allocate interrupt %i\n",
fifo->irq);
goto err_unmap;
goto err_initial;
}
/* ----------------------------
@ -877,7 +867,7 @@ static int axis_fifo_probe(struct platform_device *pdev)
/* allocate device number */
rc = alloc_chrdev_region(&fifo->devt, 0, 1, DRIVER_NAME);
if (rc < 0)
goto err_irq;
goto err_initial;
dev_dbg(fifo->dt_device, "allocated device number major %i minor %i\n",
MAJOR(fifo->devt), MINOR(fifo->devt));
@ -901,7 +891,7 @@ static int axis_fifo_probe(struct platform_device *pdev)
}
/* create sysfs entries */
rc = sysfs_create_group(&fifo->device->kobj, &axis_fifo_attrs_group);
rc = devm_device_add_group(fifo->device, &axis_fifo_attrs_group);
if (rc < 0) {
dev_err(fifo->dt_device, "couldn't register sysfs group\n");
goto err_cdev;
@ -919,12 +909,6 @@ static int axis_fifo_probe(struct platform_device *pdev)
device_destroy(axis_fifo_driver_class, fifo->devt);
err_chrdev_region:
unregister_chrdev_region(fifo->devt, 1);
err_irq:
free_irq(fifo->irq, fifo);
err_unmap:
iounmap(fifo->base_addr);
err_mem:
release_mem_region(fifo->mem->start, resource_size(fifo->mem));
err_initial:
dev_set_drvdata(dev, NULL);
return rc;
@ -935,15 +919,12 @@ static int axis_fifo_remove(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct axis_fifo *fifo = dev_get_drvdata(dev);
sysfs_remove_group(&fifo->device->kobj, &axis_fifo_attrs_group);
cdev_del(&fifo->char_device);
dev_set_drvdata(fifo->device, NULL);
device_destroy(axis_fifo_driver_class, fifo->devt);
unregister_chrdev_region(fifo->devt, 1);
free_irq(fifo->irq, fifo);
iounmap(fifo->base_addr);
release_mem_region(fifo->mem->start, resource_size(fifo->mem));
dev_set_drvdata(dev, NULL);
return 0;
}