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Commit 3c2c58cb authored by Stefan Richter's avatar Stefan Richter
Browse files

firewire: core: fw_csr_string addendum 



Witespace and comment changes, and a different way to say i + 1 < end.

Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
parent 1f8fef7b

drivers/firewire/core-device.c

+16 −10
Original line number Diff line number Diff line
@@ -69,19 +69,22 @@ static u32 *search_leaf(u32 *directory, int search_key) 
		if (last_key == search_key &&

		    key == (CSR_DESCRIPTOR | CSR_LEAF))

			return ci.p - 1 + value;



		last_key = key;

	}



	return NULL;

}



static int textual_leaf_to_string(u32 *block, char *buf, size_t size)

{

	unsigned int quadlets, length;

	unsigned int quadlets, i;

	char c;



	if (!size || !buf)

		return -EINVAL;



	quadlets = min(block[0] >> 16, 256u);

	quadlets = min(block[0] >> 16, 256U);

	if (quadlets < 2)

		return -ENODATA;
@@ -91,31 +94,34 @@ static int textual_leaf_to_string(u32 *block, char *buf, size_t size) 


	block += 3;

	quadlets -= 2;

	for (length = 0; length < quadlets * 4 && length + 1 < size; length++) {

		char c = block[length / 4] >> (24 - 8 * (length % 4));

	for (i = 0; i < quadlets * 4 && i < size - 1; i++) {

		c = block[i / 4] >> (24 - 8 * (i % 4));

		if (c == '\0')

			break;

		buf[length] = c;

		buf[i] = c;

	}

	buf[length] = '\0';

	return length;

	buf[i] = '\0';



	return i;

}



/**

 * fw_csr_string - reads a string from the configuration ROM

 * @directory: device or unit directory;

 *             fw_device->config_rom+5 or fw_unit->directory

 * @directory: e.g. root directory or unit directory

 * @key: the key of the preceding directory entry

 * @buf: where to put the string

 * @size: size of @buf, in bytes

 *

 * Returns string length (>= 0) or error code (< 0).

 * The string is taken from a minimal ASCII text descriptor leaf after

 * the immediate entry with @key.  The string is zero-terminated.

 * Returns strlen(buf) or a negative error code.

 */

int fw_csr_string(u32 *directory, int key, char *buf, size_t size)

{

	u32 *leaf = search_leaf(directory, key);

	if (!leaf)

		return -ENOENT;



	return textual_leaf_to_string(leaf, buf, size);

}

EXPORT_SYMBOL(fw_csr_string);

include/linux/firewire.h

+0 −1
Original line number Diff line number Diff line
@@ -71,7 +71,6 @@ struct fw_csr_iterator { 


void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 *p);

int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value);



int fw_csr_string(u32 *directory, int key, char *buf, size_t size);



extern struct bus_type fw_bus_type;