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libnvdimm/btt: fix variable 'rc' set but not used

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drivers/nvdimm/btt.c: In function 'btt_read_pg':
drivers/nvdimm/btt.c:1264:8: warning: variable 'rc' set but not used
[-Wunused-but-set-variable]
    int rc;
        ^~

Add a ratelimited message in case a storm of errors is encountered.

Fixes: d9b83c7569 ("libnvdimm, btt: rework error clearing")
Signed-off-by: Qian Cai <cai@lca.pw>
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Link: https://lore.kernel.org/r/1572530719-32161-1-git-send-email-cai@lca.pw
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Qian Cai 2019-10-31 10:05:19 -04:00 committed by Dan Williams
parent d7c0d927ad
commit 4e24e37d53
1 changed files with 4 additions and 4 deletions
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8
drivers/nvdimm/btt.c
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@ -1261,11 +1261,11 @@ static int btt_read_pg(struct btt *btt, struct bio_integrity_payload *bip,
ret = btt_data_read(arena, page, off, postmap, cur_len);
if (ret) {
int rc;
/* Media error - set the e_flag */
rc = btt_map_write(arena, premap, postmap, 0, 1,
NVDIMM_IO_ATOMIC);
if (btt_map_write(arena, premap, postmap, 0, 1, NVDIMM_IO_ATOMIC))
dev_warn_ratelimited(to_dev(arena),
"Error persistently tracking bad blocks at %#x\n",
premap);
goto out_rtt;
}