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| author | Igor Konopko <igor.j.konopko@intel.com> | 2018-12-11 20:16:27 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-12-11 12:22:35 -0700 |
| commit | 2c4d5356e64d7d538f24c23045478330fae4a065 (patch) | |
| tree | 87d4d7172cf6de069f4d2fc0a9de4ffad7b12c59 /drivers/lightnvm | |
| parent | 55d8ec35398e7ab001989473cf6ed6f40b5ef4a6 (diff) | |
| download | linux-stable-2c4d5356e64d7d538f24c23045478330fae4a065.tar.gz linux-stable-2c4d5356e64d7d538f24c23045478330fae4a065.tar.bz2 linux-stable-2c4d5356e64d7d538f24c23045478330fae4a065.zip | |
lightnvm: pblk: do not overwrite ppa list with meta list
Ehen using pblk with 0 sized metadata both ppa list and meta list
points to the same memory since pblk_dma_meta_size() returns 0 in
that case.
This patch fix that issue by ensuring that pblk_dma_meta_size()
always returns space equal to sizeof(struct pblk_sec_meta) and thus
ppa list and meta list points to different memory address.
Even that in that case drive does not really care about meta_list
pointer, this is the easiest way to fix that issue without introducing
changes in many places in the code just for 0 sized metadata case.
The same approach needs to be also done for pblk_get_sec_meta()
since we also cannot point to the same memory address in meta buffer
when we are using it for pblk recovery process
Reported-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
Tested-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
Signed-off-by: Igor Konopko <igor.j.konopko@intel.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm')
| -rw-r--r-- | drivers/lightnvm/pblk.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h index bc40b1381ff6..85e38ed62f85 100644 --- a/drivers/lightnvm/pblk.h +++ b/drivers/lightnvm/pblk.h @@ -1388,12 +1388,15 @@ static inline unsigned int pblk_get_min_chks(struct pblk *pblk) static inline struct pblk_sec_meta *pblk_get_meta(struct pblk *pblk, void *meta, int index) { - return meta + pblk->oob_meta_size * index; + return meta + + max_t(int, sizeof(struct pblk_sec_meta), pblk->oob_meta_size) + * index; } static inline int pblk_dma_meta_size(struct pblk *pblk) { - return pblk->oob_meta_size * NVM_MAX_VLBA; + return max_t(int, sizeof(struct pblk_sec_meta), pblk->oob_meta_size) + * NVM_MAX_VLBA; } static inline int pblk_is_oob_meta_supported(struct pblk *pblk) |