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authorMatias Bjørling <mb@lightnvm.io>2018-12-11 22:16:20 +0300
committerJens Axboe <axboe@kernel.dk>2018-12-11 22:22:34 +0300
commit85136c0102852fe505c0fbd3f1bf9d17038bb94d (patch)
treed29935a0632710c0c89212a7bfca66042ae2b834 /drivers/lightnvm
parent361d889f830ef61e4eae442c4c89fb14b626375f (diff)
downloadlinux-85136c0102852fe505c0fbd3f1bf9d17038bb94d.tar.xz
lightnvm: simplify geometry enumeration
Currently the geometry of an OCSSD is enumerated using a two step approach: First, nvm_register is called, the OCSSD identify command is issued, and second the geometry sos and csecs values are read either from the OCSSD identify if it is a 1.2 drive, or from the NVMe namespace data structure if it is a 2.0 device. This patch recombines it into a single step, such that nvm_register can use the csecs and sos fields independent of which version is used. This enables one to dynamically size the lightnvm subsystem dma pool. Reviewed-by: Igor Konopko <igor.j.konopko@intel.com> Reviewed-by: Javier González <javier@cnexlabs.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/core.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 10e541cb8dc3..69b841d682c7 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -1145,25 +1145,23 @@ int nvm_register(struct nvm_dev *dev)
if (!dev->q || !dev->ops)
return -EINVAL;
+ ret = nvm_init(dev);
+ if (ret)
+ return ret;
+
dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist");
if (!dev->dma_pool) {
pr_err("nvm: could not create dma pool\n");
+ nvm_free(dev);
return -ENOMEM;
}
- ret = nvm_init(dev);
- if (ret)
- goto err_init;
-
/* register device with a supported media manager */
down_write(&nvm_lock);
list_add(&dev->devices, &nvm_devices);
up_write(&nvm_lock);
return 0;
-err_init:
- dev->ops->destroy_dma_pool(dev->dma_pool);
- return ret;
}
EXPORT_SYMBOL(nvm_register);