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firewire: core: rename some variables

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In manage_channel(), rename the variables "c" and "i" to the more
expressive "bit" and "channel".

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Clemens Ladisch 2011-01-31 11:58:58 +01:00 committed by Stefan Richter
parent 8fd2af11d2
commit 5aaffc65a2
1 changed files with 11 additions and 11 deletions
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22
drivers/firewire/core-iso.c
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@ -235,45 +235,45 @@ static int manage_bandwidth(struct fw_card *card, int irm_id, int generation,
static int manage_channel(struct fw_card *card, int irm_id, int generation,
u32 channels_mask, u64 offset, bool allocate, __be32 data[2])
{
__be32 c, all, old;
int i, ret = -EIO, retry = 5;
__be32 bit, all, old;
int channel, ret = -EIO, retry = 5;
old = all = allocate ? cpu_to_be32(~0) : 0;
for (i = 0; i < 32; i++) {
if (!(channels_mask & 1 << i))
for (channel = 0; channel < 32; channel++) {
if (!(channels_mask & 1 << channel))
continue;
ret = -EBUSY;
c = cpu_to_be32(1 << (31 - i));
if ((old & c) != (all & c))
bit = cpu_to_be32(1 << (31 - channel));
if ((old & bit) != (all & bit))
continue;
data[0] = old;
data[1] = old ^ c;
data[1] = old ^ bit;
switch (fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP,
irm_id, generation, SCODE_100,
offset, data, 8)) {
case RCODE_GENERATION:
/* A generation change frees all channels. */
return allocate ? -EAGAIN : i;
return allocate ? -EAGAIN : channel;
case RCODE_COMPLETE:
if (data[0] == old)
return i;
return channel;
old = data[0];
/* Is the IRM 1394a-2000 compliant? */
if ((data[0] & c) == (data[1] & c))
if ((data[0] & bit) == (data[1] & bit))
continue;
/* 1394-1995 IRM, fall through to retry. */
default:
if (retry) {
retry--;
i--;
channel--;
} else {
ret = -EIO;
}