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ALSA: fireworks: Use safer way to arrange ring buffer pointer

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To reverse a pointer for the ring buffer, subtraction by buffer
size is better than assignment to the beginning of the buffer.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2014-06-04 15:25:33 +09:00 committed by Takashi Iwai
parent c6e5e741c6
commit cf44a136c0
2 changed files with 2 additions and 2 deletions
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2
sound/firewire/fireworks/fireworks_hwdep.c
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@ -58,7 +58,7 @@ hwdep_read_resp_buf(struct snd_efw *efw, char __user *buf, long remained,
efw->pull_ptr += till_end;
if (efw->pull_ptr >= efw->resp_buf +
snd_efw_resp_buf_size)
efw->pull_ptr = efw->resp_buf;
efw->pull_ptr -= snd_efw_resp_buf_size;
length -= till_end;
buf += till_end;

2
sound/firewire/fireworks/fireworks_transaction.c
View File

@ -148,7 +148,7 @@ copy_resp_to_buf(struct snd_efw *efw, void *data, size_t length, int *rcode)
efw->push_ptr += till_end;
if (efw->push_ptr >= efw->resp_buf + snd_efw_resp_buf_size)
efw->push_ptr = efw->resp_buf;
efw->push_ptr -= snd_efw_resp_buf_size;
length -= till_end;
data += till_end;