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crypto: tcrypt - fix buflen reminder calculation

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- This fixes the intent of the code to limit the last scatterlist to
  either a full PAGE or a fraction of it, depending on the number of
  pages needed by buflen and the available space advertised by XBUFLEN.

  The original code always sets the last scatterlist to a fraction of a
  PAGE because the first 'if' is never executed.

- Rearrange the second part of the code to remove the conditional from
  the loop

Signed-off-by: Cristian Stoica <cristian.stoica@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Cristian Stoica 2015-01-27 11:54:27 +02:00 committed by Herbert Xu
parent db71f29a1c
commit c47689931f
1 changed files with 8 additions and 8 deletions
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16
crypto/tcrypt.c
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@ -250,19 +250,19 @@ static void sg_init_aead(struct scatterlist *sg, char *xbuf[XBUFSIZE],
int np = (buflen + PAGE_SIZE - 1)/PAGE_SIZE;
int k, rem;
np = (np > XBUFSIZE) ? XBUFSIZE : np;
rem = buflen % PAGE_SIZE;
if (np > XBUFSIZE) {
rem = PAGE_SIZE;
np = XBUFSIZE;
} else {
rem = buflen % PAGE_SIZE;
}
sg_init_table(sg, np);
for (k = 0; k < np; ++k) {
if (k == (np-1))
sg_set_buf(&sg[k], xbuf[k], rem);
else
sg_set_buf(&sg[k], xbuf[k], PAGE_SIZE);
}
np--;
for (k = 0; k < np; k++)
sg_set_buf(&sg[k], xbuf[k], PAGE_SIZE);
sg_set_buf(&sg[k], xbuf[k], rem);
}
static void test_aead_speed(const char *algo, int enc, unsigned int secs,