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vfio-ccw: Adjust the first IDAW outside of the nested loops

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Now that pfn_array_table[] is always an array of 1, it seems silly to
check for the very first entry in an array in the middle of two nested
loops, since we know it'll only ever happen once.

Let's move this outside the loops to simplify things, even though
the "k" variable is still necessary.

Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20190606202831.44135-7-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Eric Farman 2019-06-06 22:28:28 +02:00 committed by Cornelia Huck
parent cc06ee983c
commit 8aabf0edae
1 changed files with 3 additions and 2 deletions
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5
drivers/s390/cio/vfio_ccw_cp.c
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@ -201,11 +201,12 @@ static inline void pfn_array_table_idal_create_words(
pa = pat->pat_pa + i; pa = pat->pat_pa + i;
for (j = 0; j < pa->pa_nr; j++) { for (j = 0; j < pa->pa_nr; j++) {
idaws[k] = pa->pa_pfn[j] << PAGE_SHIFT; idaws[k] = pa->pa_pfn[j] << PAGE_SHIFT;
if (k == 0)
idaws[k] += pa->pa_iova & (PAGE_SIZE - 1);
k++; k++;
} }
} }
/* Adjust the first IDAW, since it may not start on a page boundary */
idaws[0] += pat->pat_pa->pa_iova & (PAGE_SIZE - 1);
} }