Re: [PATCH] PNP: Simplify setting of resources
On 15/12/12 01:17, Rafael J. Wysocki wrote: [snip] > Both patches queued up for submission as v3.8 material later in the cycle. Thanks! --- Witold > > Thanks, > Rafael > [snip] -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH] PNP: Simplify setting of resources
On Wednesday, December 12, 2012 04:32:33 PM Witold Szczeponik wrote:
> 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.
>
> The patch is applied against Linux 3.7 as well as linux-pm.git/master
> as of 2012-12-12.
Both patches queued up for submission as v3.8 material later in the cycle.
Thanks,
Rafael
> Signed-off-by: Witold Szczeponik
> Reviewed-by: Bjorn Helgaas
>
>
> Index: linux/drivers/pnp/interface.c
> ===
> --- linux.orig/drivers/pnp/interface.c
> +++ linux/drivers/pnp/interface.c
> @@ -298,6 +298,39 @@ static ssize_t pnp_show_current_resource
> 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 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
> 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;
> @@ -357,42 +393,37 @@ static ssize_t pnp_set_current_resources
> 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);
> - } 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);
> -
[PATCH] 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.
The patch is applied against Linux 3.7 as well as linux-pm.git/master
as of 2012-12-12.
Signed-off-by: Witold Szczeponik
Reviewed-by: Bjorn Helgaas
Index: linux/drivers/pnp/interface.c
===
--- linux.orig/drivers/pnp/interface.c
+++ linux/drivers/pnp/interface.c
@@ -298,6 +298,39 @@ static ssize_t pnp_show_current_resource
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 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
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;
@@ -357,42 +393,37 @@ static ssize_t pnp_set_current_resources
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);
- } 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;
+
