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Commit bd37e5a9 authored by Kay Sievers's avatar Kay Sievers Committed by Greg Kroah-Hartman
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[PATCH] INPUT: add MODALIAS to the event environment 



input: add MODALIAS to the event environment

Signed-off-by: default avatarKay Sievers <kay.sievers@suse.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 67daf5f1

drivers/input/input.c

+37 −18
Original line number Diff line number Diff line
@@ -528,40 +528,56 @@ INPUT_DEV_STRING_ATTR_SHOW(name); 
INPUT_DEV_STRING_ATTR_SHOW(phys);

INPUT_DEV_STRING_ATTR_SHOW(uniq);



static int print_modalias_bits(char *buf, char prefix, unsigned long *arr,

static int print_modalias_bits(char *buf, int size, char prefix, unsigned long *arr,

			       unsigned int min, unsigned int max)

{

	int len, i;



	len = sprintf(buf, "%c", prefix);

	len = snprintf(buf, size, "%c", prefix);

	for (i = min; i < max; i++)

		if (arr[LONG(i)] & BIT(i))

			len += sprintf(buf+len, "%X,", i);

			len += snprintf(buf + len, size - len, "%X,", i);

	return len;

}



static ssize_t input_dev_show_modalias(struct class_device *dev, char *buf)

static int print_modalias(char *buf, int size, struct input_dev *id)

{

	struct input_dev *id = to_input_dev(dev);

	ssize_t len = 0;

	int len;



	len += sprintf(buf+len, "input:b%04Xv%04Xp%04Xe%04X-",

	len = snprintf(buf, size, "input:b%04Xv%04Xp%04Xe%04X-",

		       id->id.bustype,

		       id->id.vendor,

		       id->id.product,

		       id->id.version);



	len += print_modalias_bits(buf+len, 'e', id->evbit, 0, EV_MAX);

	len += print_modalias_bits(buf+len, 'k', id->keybit,

	len += print_modalias_bits(buf + len, size - len, 'e', id->evbit,

				   0, EV_MAX);

	len += print_modalias_bits(buf + len, size - len, 'k', id->keybit,

				   KEY_MIN_INTERESTING, KEY_MAX);

	len += print_modalias_bits(buf+len, 'r', id->relbit, 0, REL_MAX);

	len += print_modalias_bits(buf+len, 'a', id->absbit, 0, ABS_MAX);

	len += print_modalias_bits(buf+len, 'm', id->mscbit, 0, MSC_MAX);

	len += print_modalias_bits(buf+len, 'l', id->ledbit, 0, LED_MAX);

	len += print_modalias_bits(buf+len, 's', id->sndbit, 0, SND_MAX);

	len += print_modalias_bits(buf+len, 'f', id->ffbit, 0, FF_MAX);

	len += print_modalias_bits(buf+len, 'w', id->swbit, 0, SW_MAX);

	len += sprintf(buf+len, "\n");

	len += print_modalias_bits(buf + len, size - len, 'r', id->relbit,

				   0, REL_MAX);

	len += print_modalias_bits(buf + len, size - len, 'a', id->absbit,

				   0, ABS_MAX);

	len += print_modalias_bits(buf + len, size - len, 'm', id->mscbit,

				   0, MSC_MAX);

	len += print_modalias_bits(buf + len, size - len, 'l', id->ledbit,

				   0, LED_MAX);

	len += print_modalias_bits(buf + len, size - len, 's', id->sndbit,

				   0, SND_MAX);

	len += print_modalias_bits(buf + len, size - len, 'f', id->ffbit,

				   0, FF_MAX);

	len += print_modalias_bits(buf + len, size - len, 'w', id->swbit,

				   0, SW_MAX);

	return len;

}



static ssize_t input_dev_show_modalias(struct class_device *dev, char *buf)

{

	struct input_dev *id = to_input_dev(dev);

	ssize_t len;



	len = print_modalias(buf, PAGE_SIZE, id);

	len += snprintf(buf + len, PAGE_SIZE-len, "\n");

	return len;

}

static CLASS_DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL);
@@ -728,8 +744,11 @@ static int input_dev_uevent(struct class_device *cdev, char **envp, 
	if (test_bit(EV_SW, dev->evbit))

		INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX);



	envp[i] = NULL;

	envp[i++] = buffer + len;

	len += snprintf(buffer + len, buffer_size - len, "MODALIAS=");

	len += print_modalias(buffer + len, buffer_size - len, dev) + 1;



	envp[i] = NULL;

	return 0;

}