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nvme/host: reference the fabric module for each bdev open callout

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We don't want to be able to unload the fabric driver when we have
openened referenced to our namespaces. Thus, for each nvme_open we
take a reference on the fabric driver and put it in nvme_release.
This behavior is consistent with the scsi model.

This resolves the panic when unloading a fabric module with
mpath holders.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ian Bakshan <ianb@mellanox.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Ming Lin <ming.l@ssi.samsung.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Sagi Grimberg
2016-02-10 10:03:29 -08:00
committed by Jens Axboe
parent 1b3c47c182
commit e439bb12e7
3 changed files with 18 additions and 3 deletions
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1
drivers/nvme/host/pci.c
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@@ -2036,6 +2036,7 @@ static int nvme_pci_reset_ctrl(struct nvme_ctrl *ctrl)
}
static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = {
.module = THIS_MODULE,
.reg_read32 = nvme_pci_reg_read32,
.reg_write32 = nvme_pci_reg_write32,
.reg_read64 = nvme_pci_reg_read64,