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https://github.com/edk2-porting/linux-next.git
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b5bf5b6786
This adds sysfs nodes that the hotplug userspace can use to load the
appropriate modules.
In order for hotplug to work with macio devices, patches to
module-init-tools and hotplug must be applied. Those patches are
available at:
ftp://ftp.suse.com/pub/people/jeffm/linux/macio-hotplug/
Changes: The previous versions were built on 2.6.12. 2.6.13-rcX introduced
a device_attribute parameter to the show functions. Since that
parameter was treated as the output buffer, memory corruption would
result, causing Oopsen very quickly.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/stat.h>
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#include <asm/macio.h>
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#define macio_config_of_attr(field, format_string) \
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static ssize_t \
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field##_show (struct device *dev, struct device_attribute *attr, \
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char *buf) \
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{ \
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struct macio_dev *mdev = to_macio_device (dev); \
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return sprintf (buf, format_string, mdev->ofdev.node->field); \
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}
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static ssize_t
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compatible_show (struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct of_device *of;
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char *compat;
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int cplen;
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int length = 0;
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of = &to_macio_device (dev)->ofdev;
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compat = (char *) get_property(of->node, "compatible", &cplen);
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if (!compat) {
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*buf = '\0';
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return 0;
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}
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while (cplen > 0) {
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int l;
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length += sprintf (buf, "%s\n", compat);
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buf += length;
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l = strlen (compat) + 1;
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compat += l;
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cplen -= l;
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}
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return length;
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}
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macio_config_of_attr (name, "%s\n");
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macio_config_of_attr (type, "%s\n");
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struct device_attribute macio_dev_attrs[] = {
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__ATTR_RO(name),
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__ATTR_RO(type),
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__ATTR_RO(compatible),
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__ATTR_NULL
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};
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