Re: [PATCH] lightnvm: pblk: fix error path in pblk_lines_alloc_metadata

From: Matias BjÃrling
Date: Thu Sep 21 2017 - 07:14:55 EST


On 09/21/2017 12:15 PM, Rakesh Pandit wrote:
On Thu, Sep 21, 2017 at 11:56:46AM +0200, Javier GonzÃlez wrote:
On 20 Sep 2017, at 21.50, Rakesh Pandit <rakesh@xxxxxxxxxx> wrote:

Use appropriate memory free calls based on allocation type used and
also fix number of times free is called if kmalloc fails.

Signed-off-by: Rakesh Pandit <rakesh@xxxxxxxxxx>
---
drivers/lightnvm/pblk-init.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index 7cf4b53..470ef04 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -624,12 +624,16 @@ static int pblk_lines_alloc_metadata(struct pblk *pblk)

fail_free_emeta:
while (--i >= 0) {
- vfree(l_mg->eline_meta[i]->buf);
+ if (l_mg->emeta_alloc_type == PBLK_VMALLOC_META)
+ vfree(l_mg->eline_meta[i]->buf);
+ else
+ kfree(l_mg->eline_meta[i]->buf);
kfree(l_mg->eline_meta[i]);
}

+ i = PBLK_DATA_LINES;
fail_free_smeta:
- for (i = 0; i < PBLK_DATA_LINES; i++)
+ while (--i >= 0)
kfree(l_mg->sline_meta[i]);

It is safe to use kfree on NULL pointers. No need to do this. You can
either send a new patch, or we can change it when picking it up.

Yes, that would be great if this is adjusted while picking up.



return -ENOMEM;
--
2.5.0

Rest looks good.


Reviewed-by: Javier GonzÃlez <javier@xxxxxxxxxxxx>


Thanks,


Thanks Rakesh. I queued it up.