[PATCH 5.9 165/757] nvme: fix error handling in nvme_ns_report_zones

Greg Kroah-Hartman
2020-10-27T15:43:36Z

From: Christoph Hellwig <hch@lst.de>

[ Upstream commit 936fab503ff4af94f5f9c0b549f3ab4d435500ec ]

nvme_submit_sync_cmd can return positive NVMe error codes in addition to
the negative Linux error code, which are currently ignored. Fix this
by removing __nvme_ns_report_zones and handling the errors from
nvme_submit_sync_cmd in the caller instead of multiplexing the return
value and the number of zones reported into a single return value.

Fixes: 240e6ee272c0 ("nvme: support for zoned namespaces")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/nvme/host/zns.c | 41 ++++++++++++++++-------------------------
1 file changed, 16 insertions(+), 25 deletions(-)

diff --git a/drivers/nvme/host/zns.c b/drivers/nvme/host/zns.c
index 57cfd78731fbb..53efecb678983 100644
--- a/drivers/nvme/host/zns.c
+++ b/drivers/nvme/host/zns.c
@@ -133,28 +133,6 @@ static void *nvme_zns_alloc_report_buffer(struct nvme_ns *ns,
return NULL;
}

-static int __nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector,
- struct nvme_zone_report *report,
- size_t buflen)
-{
- struct nvme_command c = { };
- int ret;
-
- c.zmr.opcode = nvme_cmd_zone_mgmt_recv;
- c.zmr.nsid = cpu_to_le32(ns->head->ns_id);
- c.zmr.slba = cpu_to_le64(nvme_sect_to_lba(ns, sector));
- c.zmr.numd = cpu_to_le32(nvme_bytes_to_numd(buflen));
- c.zmr.zra = NVME_ZRA_ZONE_REPORT;
- c.zmr.zrasf = NVME_ZRASF_ZONE_REPORT_ALL;
- c.zmr.pr = NVME_REPORT_ZONE_PARTIAL;
-
- ret = nvme_submit_sync_cmd(ns->queue, &c, report, buflen);
- if (ret)
- return ret;
-
- return le64_to_cpu(report->nr_zones);
-}
-
static int nvme_zone_parse_entry(struct nvme_ns *ns,
struct nvme_zone_descriptor *entry,
unsigned int idx, report_zones_cb cb,
@@ -182,6 +160,7 @@ static int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector,
unsigned int nr_zones, report_zones_cb cb, void *data)
{
struct nvme_zone_report *report;
+ struct nvme_command c = { };
int ret, zone_idx = 0;
unsigned int nz, i;
size_t buflen;
@@ -190,14 +169,26 @@ static int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector,
if (!report)
return -ENOMEM;

+ c.zmr.opcode = nvme_cmd_zone_mgmt_recv;
+ c.zmr.nsid = cpu_to_le32(ns->head->ns_id);
+ c.zmr.numd = cpu_to_le32(nvme_bytes_to_numd(buflen));
+ c.zmr.zra = NVME_ZRA_ZONE_REPORT;
+ c.zmr.zrasf = NVME_ZRASF_ZONE_REPORT_ALL;
+ c.zmr.pr = NVME_REPORT_ZONE_PARTIAL;
+
sector &= ~(ns->zsze - 1);
while (zone_idx < nr_zones && sector < get_capacity(ns->disk)) {
memset(report, 0, buflen);
- ret = __nvme_ns_report_zones(ns, sector, report, buflen);
- if (ret < 0)
+
+ c.zmr.slba = cpu_to_le64(nvme_sect_to_lba(ns, sector));
+ ret = nvme_submit_sync_cmd(ns->queue, &c, report, buflen);
+ if (ret) {
+ if (ret > 0)
+ ret = -EIO;
goto out_free;
+ }

- nz = min_t(unsigned int, ret, nr_zones);
+ nz = min((unsigned int)le64_to_cpu(report->nr_zones), nr_zones);
if (!nz)
break;

--
2.25.1