Commit c9377667 authored by Witold Szczeponik's avatar Witold Szczeponik Committed by Rafael J. Wysocki
Browse files

PNP: Simplify setting of resources 



This patch factors out the setting of PNP resources into one function which is
then reused for all PNP resource types.  This makes the code more concise and
avoids duplication.  The parameters "type" and "flags" are not used at the
moment but may be used by follow-up patches.  Placeholders for these patches
can be found in the comment lines that contain the "TBD" marker.

As the code does not make any changes to the ABI, no regressions are expected.

NB: While at it, support for bus type resources is added.

Signed-off-by: default avatarWitold Szczeponik <Witold.Szczeponik@gmx.net>
Reviewed-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent d1c3ed66

drivers/pnp/interface.c

+68 −37
Original line number Diff line number Diff line
@@ -298,6 +298,39 @@ static ssize_t pnp_show_current_resources(struct device *dmdev, 
	return ret;

}



static char *pnp_get_resource_value(char *buf,

				    unsigned long type,

				    resource_size_t *start,

				    resource_size_t *end,

				    unsigned long *flags)

{

	if (start)

		*start = 0;

	if (end)

		*end = 0;

	if (flags)

		*flags = 0;



	/* TBD: allow for disabled resources */



	buf = skip_spaces(buf);

	if (start) {

		*start = simple_strtoull(buf, &buf, 0);

		if (end) {

			buf = skip_spaces(buf);

			if (*buf == '-') {

				buf = skip_spaces(buf + 1);

				*end = simple_strtoull(buf, &buf, 0);

			} else

				*end = *start;

		}

	}



	/* TBD: allow for additional flags, e.g., IORESOURCE_WINDOW */



	return buf;

}



static ssize_t pnp_set_current_resources(struct device *dmdev,

					 struct device_attribute *attr,

					 const char *ubuf, size_t count)
@@ -305,7 +338,6 @@ static ssize_t pnp_set_current_resources(struct device *dmdev, 
	struct pnp_dev *dev = to_pnp_dev(dmdev);

	char *buf = (void *)ubuf;

	int retval = 0;

	resource_size_t start, end;



	if (dev->status & PNP_ATTACHED) {

		retval = -EBUSY;
@@ -349,6 +381,10 @@ static ssize_t pnp_set_current_resources(struct device *dmdev, 
		goto done;

	}

	if (!strnicmp(buf, "set", 3)) {

		resource_size_t start;

		resource_size_t end;

		unsigned long flags;



		if (dev->active)

			goto done;

		buf += 3;
@@ -357,41 +393,36 @@ static ssize_t pnp_set_current_resources(struct device *dmdev, 
		while (1) {

			buf = skip_spaces(buf);

			if (!strnicmp(buf, "io", 2)) {

				buf = skip_spaces(buf + 2);

				start = simple_strtoul(buf, &buf, 0);

				buf = skip_spaces(buf);

				if (*buf == '-') {

					buf = skip_spaces(buf + 1);

					end = simple_strtoul(buf, &buf, 0);

				buf = pnp_get_resource_value(buf + 2,

							     IORESOURCE_IO,

							     &start, &end,

							     &flags);

				pnp_add_io_resource(dev, start, end, flags);

			} else if (!strnicmp(buf, "mem", 3)) {

				buf = pnp_get_resource_value(buf + 3,

							     IORESOURCE_MEM,

							     &start, &end,

							     &flags);

				pnp_add_mem_resource(dev, start, end, flags);

			} else if (!strnicmp(buf, "irq", 3)) {

				buf = pnp_get_resource_value(buf + 3,

							     IORESOURCE_IRQ,

							     &start, NULL,

							     &flags);

				pnp_add_irq_resource(dev, start, flags);

			} else if (!strnicmp(buf, "dma", 3)) {

				buf = pnp_get_resource_value(buf + 3,

							     IORESOURCE_DMA,

							     &start, NULL,

							     &flags);

				pnp_add_dma_resource(dev, start, flags);

			} else if (!strnicmp(buf, "bus", 3)) {

				buf = pnp_get_resource_value(buf + 3,

							     IORESOURCE_BUS,

							     &start, &end,

							     NULL);

				pnp_add_bus_resource(dev, start, end);

			} else

					end = start;

				pnp_add_io_resource(dev, start, end, 0);

				continue;

			}

			if (!strnicmp(buf, "mem", 3)) {

				buf = skip_spaces(buf + 3);

				start = simple_strtoul(buf, &buf, 0);

				buf = skip_spaces(buf);

				if (*buf == '-') {

					buf = skip_spaces(buf + 1);

					end = simple_strtoul(buf, &buf, 0);

				} else

					end = start;

				pnp_add_mem_resource(dev, start, end, 0);

				continue;

			}

			if (!strnicmp(buf, "irq", 3)) {

				buf = skip_spaces(buf + 3);

				start = simple_strtoul(buf, &buf, 0);

				pnp_add_irq_resource(dev, start, 0);

				continue;

			}

			if (!strnicmp(buf, "dma", 3)) {

				buf = skip_spaces(buf + 3);

				start = simple_strtoul(buf, &buf, 0);

				pnp_add_dma_resource(dev, start, 0);

				continue;

			}

				break;

		}

		mutex_unlock(&pnp_res_mutex);

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