> Well, I spent the last 36 hours (more or less) trying to bisect the SD
> problem. The method I used was to insert the card, umount it, and make 8 dd
> in a row; the kernel is "bad" if they differs, "good" if they are the same.
>
> I could not finish the bisect. The last pair good/bad were:
>
> bad: [7aeacf982203fb4dea2f3434eefdc268cfd5d6d9]
> [BLOCK] blk_rq_map_sg: force clear termination bit
> good: [e38f981758118d829cd40cfe9c09e3fa81e422aa]
> exportfs: update documentation
Thanks, that helps. I read over the mmc changes in between those two
commits, and I think I found the problem... could you please try the
patch below (on top of the latest kernel) and report back how it
works? Unfortunately I am traveling and I don't have an SD card with
me to test on my laptop...
Pierre, assuming Romano tests this patch successfully, please apply!
Thanks,
Roland
<-- patch below -->
mmc: Fix sg helper copy-and-paste error
Commit 45711f1a ("[SG] Update drivers to use sg helpers") had the
following bogus change in drivers/mmc/card/queue.c:
> - src_buf = page_address(src->page) + src->offset;
> + src_buf = sg_virt(dst);
(Notice that "src" is converted to "dst"). Turn this "dst" back into
the intended "src".
Cc: Jens Axboe <[email protected]>
Signed-off-by: Roland Dreier <[email protected]>
---
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index 9203a0b..1b9c9b6 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -310,7 +310,7 @@ static void copy_sg(struct scatterlist *dst, unsigned int dst_len,
}
if (src_size == 0) {
- src_buf = sg_virt(dst);
+ src_buf = sg_virt(src);
src_size = src->length;
}
-
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