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ioat3: fix uninitialized var warnings 

drivers/dma/ioat/dma_v3.c: In function 'ioat3_prep_memset_lock':
drivers/dma/ioat/dma_v3.c:439: warning: 'fill' may be used uninitialized in this function
drivers/dma/ioat/dma_v3.c:437: warning: 'desc' may be used uninitialized in this function
drivers/dma/ioat/dma_v3.c: In function '__ioat3_prep_xor_lock':
drivers/dma/ioat/dma_v3.c:489: warning: 'xor' may be used uninitialized in this function
drivers/dma/ioat/dma_v3.c:486: warning: 'desc' may be used uninitialized in this function
drivers/dma/ioat/dma_v3.c: In function '__ioat3_prep_pq_lock':
drivers/dma/ioat/dma_v3.c:631: warning: 'pq' may be used uninitialized in this function
drivers/dma/ioat/dma_v3.c:628: warning: 'desc' may be used uninitialized in this function

gcc-4.0, unlike gcc-4.3, does not see that these variables are
initialized before use.  Convert the descriptor loops to do-while make
this initialization apparent.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2009-09-21 09:22:29 -07:00
parent f477f5b331
commit cdef57dbb6
1 changed files with 9 additions and 6 deletions
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15
drivers/dma/ioat/dma_v3.c
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@ -448,7 +448,8 @@ ioat3_prep_memset_lock(struct dma_chan *c, dma_addr_t dest, int value,
/* pass */;
else
return NULL;
for (i = 0; i < num_descs; i++) {
i = 0;
do {
size_t xfer_size = min_t(size_t, len, 1 << ioat->xfercap_log);
desc = ioat2_get_ring_ent(ioat, idx + i);
@ -463,7 +464,7 @@ ioat3_prep_memset_lock(struct dma_chan *c, dma_addr_t dest, int value,
len -= xfer_size;
dest += xfer_size;
dump_desc_dbg(ioat, desc);
}
} while (++i < num_descs);
desc->txd.flags = flags;
desc->len = total_len;
@ -518,7 +519,8 @@ __ioat3_prep_xor_lock(struct dma_chan *c, enum sum_check_flags *result,
/* pass */;
else
return NULL;
for (i = 0; i < num_descs; i += 1 + with_ext) {
i = 0;
do {
struct ioat_raw_descriptor *descs[2];
size_t xfer_size = min_t(size_t, len, 1 << ioat->xfercap_log);
int s;
@ -546,7 +548,7 @@ __ioat3_prep_xor_lock(struct dma_chan *c, enum sum_check_flags *result,
len -= xfer_size;
offset += xfer_size;
dump_desc_dbg(ioat, desc);
}
} while ((i += 1 + with_ext) < num_descs);
/* last xor descriptor carries the unmap parameters and fence bit */
desc->txd.flags = flags;
@ -664,7 +666,8 @@ __ioat3_prep_pq_lock(struct dma_chan *c, enum sum_check_flags *result,
/* pass */;
else
return NULL;
for (i = 0; i < num_descs; i += 1 + with_ext) {
i = 0;
do {
struct ioat_raw_descriptor *descs[2];
size_t xfer_size = min_t(size_t, len, 1 << ioat->xfercap_log);
@ -703,7 +706,7 @@ __ioat3_prep_pq_lock(struct dma_chan *c, enum sum_check_flags *result,
len -= xfer_size;
offset += xfer_size;
}
} while ((i += 1 + with_ext) < num_descs);
/* last pq descriptor carries the unmap parameters and fence bit */
desc->txd.flags = flags;