| Message ID | 1478777217-11514-1-git-send-email-m@bjorling.me (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c index f5e3011..5daf2f4 100644 --- a/drivers/nvme/host/lightnvm.c +++ b/drivers/nvme/host/lightnvm.c @@ -612,7 +612,7 @@ int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node, ret = nvm_register(dev); - ns->lba_shift = ilog2(dev->sec_size) - 9; + ns->lba_shift = ilog2(dev->sec_size); if (sysfs_create_group(&dev->dev.kobj, attrs)) pr_warn("%s: failed to create sysfs group for identification\n",
The ns->lba_shift assumes its value to be the logarithmic of the LA size. A previous patch duplicated the lba_shift calculation into lightnvm. It prematurely also subtracted a 512byte shift, which commonly is applied per-command. The 512byte shift being subtracted twice led to data loss when restoring the logical to physical mapping table from device and when issuing I/O commands using rrpc. Fix offset by removing the 512byte shift subtraction when calculating lba_shift. Fixes: b0b4e09c1ae7 "lightnvm: control life of nvm_dev in driver" Reported-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> --- drivers/nvme/host/lightnvm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)