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Message-Id: <1253568443.27471.14.camel@dwillia2-linux.ch.intel.com>
Date: Mon, 21 Sep 2009 14:27:23 -0700
From: Dan Williams <dan.j.williams@...el.com>
To: NeilBrown <neilb@...e.de>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
linux-raid <linux-raid@...r.kernel.org>,
Maciej Sosnowski <maciej.sosnowski@...el.com>
Subject: [git pull] ioat/async_tx fixes for 2.6.32
Hi Neil,
Looks like Linus has not pulled your md tree yet. So, please pull the
async_tx.git/next tree again to get a few incremental updates.
Specifically Andrew corrected my thinking regarding warnings from older
compilers, and there are a few missing dma_unmap calls in the raid6
recovery code.
Thanks,
Dan
---
The following changes since commit 1b6df6930994d5d027375b07ac9da63644eb5758:
Dan Williams (1):
raid6test: fix stack overflow
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx.git next
Andrew Morton (1):
drivers/dma/ioat/dma_v2.c: fix warnings
Dan Williams (2):
ioat3: fix uninitialized var warnings
async_tx/raid6: add missing dma_unmap calls to the async fail case
crypto/async_tx/async_raid6_recov.c | 13 +++++++++++++
drivers/dma/ioat/dma_v2.c | 5 +++--
drivers/dma/ioat/dma_v3.c | 15 +++++++++------
3 files changed, 25 insertions(+), 8 deletions(-)
commit f477f5b3316f39c841aa121a219b82b3a56e7da7
Author: Andrew Morton <akpm@...ux-foundation.org>
Date: Mon Sep 21 09:17:58 2009 -0700
drivers/dma/ioat/dma_v2.c: fix warnings
drivers/dma/ioat/dma_v2.c: In function 'ioat2_dma_prep_memcpy_lock':
drivers/dma/ioat/dma_v2.c:680: warning: 'hw' may be used uninitialized in this function
drivers/dma/ioat/dma_v2.c:681: warning: 'desc' may be used uninitialized in this function
Cc: Maciej Sosnowski <maciej.sosnowski@...el.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
diff --git a/drivers/dma/ioat/dma_v2.c b/drivers/dma/ioat/dma_v2.c
index 8fd0b59..96ffab7 100644
--- a/drivers/dma/ioat/dma_v2.c
+++ b/drivers/dma/ioat/dma_v2.c
@@ -692,7 +692,8 @@ ioat2_dma_prep_memcpy_lock(struct dma_chan *c, dma_addr_t dma_dest,
/* pass */;
else
return NULL;
- for (i = 0; i < num_descs; i++) {
+ i = 0;
+ do {
size_t copy = min_t(size_t, len, 1 << ioat->xfercap_log);
desc = ioat2_get_ring_ent(ioat, idx + i);
@@ -707,7 +708,7 @@ ioat2_dma_prep_memcpy_lock(struct dma_chan *c, dma_addr_t dma_dest,
dst += copy;
src += copy;
dump_desc_dbg(ioat, desc);
- }
+ } while (++i < num_descs);
desc->txd.flags = flags;
desc->len = total_len;
commit cdef57dbb618608bfffda2fc32c8d0a4012a1d3a
Author: Dan Williams <dan.j.williams@...el.com>
Date: Mon Sep 21 09:22:29 2009 -0700
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@...el.com>
diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c
index 3686ddd..35d1e33 100644
--- a/drivers/dma/ioat/dma_v3.c
+++ b/drivers/dma/ioat/dma_v3.c
@@ -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;
commit 1f6672d44c1ae7408b43c06170ec34eb0a0e9b9f
Author: Dan Williams <dan.j.williams@...el.com>
Date: Mon Sep 21 10:47:40 2009 -0700
async_tx/raid6: add missing dma_unmap calls to the async fail case
If we are unable to offload async_mult() or async_sum_product(), then
unmap the buffers before falling through to the synchronous path.
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
diff --git a/crypto/async_tx/async_raid6_recov.c b/crypto/async_tx/async_raid6_recov.c
index 822a42d..6d73dde 100644
--- a/crypto/async_tx/async_raid6_recov.c
+++ b/crypto/async_tx/async_raid6_recov.c
@@ -55,6 +55,13 @@ async_sum_product(struct page *dest, struct page **srcs, unsigned char *coef,
async_tx_submit(chan, tx, submit);
return tx;
}
+
+ /* could not get a descriptor, unmap and fall through to
+ * the synchronous path
+ */
+ dma_unmap_page(dev, dma_dest[1], len, DMA_BIDIRECTIONAL);
+ dma_unmap_page(dev, dma_src[0], len, DMA_TO_DEVICE);
+ dma_unmap_page(dev, dma_src[1], len, DMA_TO_DEVICE);
}
/* run the operation synchronously */
@@ -101,6 +108,12 @@ async_mult(struct page *dest, struct page *src, u8 coef, size_t len,
async_tx_submit(chan, tx, submit);
return tx;
}
+
+ /* could not get a descriptor, unmap and fall through to
+ * the synchronous path
+ */
+ dma_unmap_page(dev, dma_dest[1], len, DMA_BIDIRECTIONAL);
+ dma_unmap_page(dev, dma_src[0], len, DMA_TO_DEVICE);
}
/* no channel available, or failed to allocate a descriptor, so
--
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