On 2017年07月11日 17:17, Damien Le Moal wrote:
Xiubo,
On Tue, 2017-07-11 at 17:04 +0800, Xiubo Li wrote:
diff --git a/drivers/target/target_core_user.c
b/drivers/target/target_core_user.c
index 930800c..86a845a 100644
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -437,7 +437,7 @@ static int scatter_data_area(struct tcmu_dev
*udev,
to_offset = get_block_offset_user(udev,
dbi,
block_remaining);
offset = DATA_BLOCK_SIZE -
block_remaining;
- to = (void *)(unsigned long)to + offset;
+ to = (void *)((unsigned long)to + offset);
if (*iov_cnt != 0 &&
to_offset == iov_tail(udev, *iov)) {
@@ -510,7 +510,7 @@ static void gather_data_area(struct tcmu_dev
*udev, struct tcmu_cmd *cmd,
copy_bytes = min_t(size_t, sg_remaining,
block_remaining);
offset = DATA_BLOCK_SIZE -
block_remaining;
- from = (void *)(unsigned long)from +
offset;
+ from = (void *)((unsigned long)from +
offset);
tcmu_flush_dcache_range(from,
copy_bytes);
memcpy(to + sg->length - sg_remaining,
from,
copy_bytes);
I was just looking at this patch and about to try to see if it fixes my
problem... It cannot hurt. Trying...
Hi Damien,
Please test another patch, I think that one maybe fix this.
void * pointer arithmetic is OK and equivalent to unsigned long. So I do not
think this actually fixes anything and could be rewritten more simply as
Yes, it is. So I just discard this one.
I meant to sent the second patch(tcmu: Fix possbile memory leak when
recalculating the cmd base size) but just for mistake by handy this one.
Actually (void *) == (char *) from the GUN C manual.
Thanks,
BRs
to += offset;
and
from += offset.
And that compiles without a warning and there are no complaints from sparse.
Cheers.
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