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Commit 3248ff43 authored by Dominik Brodowski's avatar Dominik Brodowski Committed by Linus Torvalds
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[PATCH] pcmcia: export modalias in sysfs



Provide a "modalias" entry in sysfs for PCMCIA devices.

Signed-off-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 57b6281c
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+23 −2
Original line number Diff line number Diff line
@@ -847,9 +847,29 @@ pcmcia_device_stringattr(prod_id2, prod_id[1]);
pcmcia_device_stringattr(prod_id3, prod_id[2]);
pcmcia_device_stringattr(prod_id4, prod_id[3]);

static ssize_t modalias_show(struct device *dev, char *buf)
{
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
	int i;
	u32 hash[4] = { 0, 0, 0, 0};

	/* calculate hashes */
	for (i=0; i<4; i++) {
		if (!p_dev->prod_id[i])
			continue;
		hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
	}
	return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
				"pa%08Xpb%08Xpc%08Xpd%08X\n",
				p_dev->has_manf_id ? p_dev->manf_id : 0,
				p_dev->has_card_id ? p_dev->card_id : 0,
				p_dev->has_func_id ? p_dev->func_id : 0,
				p_dev->func, p_dev->device_no,
				hash[0], hash[1], hash[2], hash[3]);
}

static ssize_t pcmcia_store_allow_func_id_match (struct device * dev, struct device_attribute *attr,
						 const char * buf, size_t count)
static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
        if (!count)
@@ -873,6 +893,7 @@ static struct device_attribute pcmcia_dev_attrs[] = {
	__ATTR_RO(prod_id2),
	__ATTR_RO(prod_id3),
	__ATTR_RO(prod_id4),
	__ATTR_RO(modalias),
	__ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
	__ATTR_NULL,
};