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nvme-core: put ctrl ref when module ref get fail

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commit 4bab69093044ca81f394bd0780be1b71c5a4d308 upstream.

When try_module_get() fails in the nvme_dev_open() it returns without
releasing the ctrl reference which was taken earlier.

Put the ctrl reference which is taken before calling the
try_module_get() in the error return code path.

Fixes: 52a3974feb1a "nvme-core: get/put ctrl and transport module in nvme_dev_open/release()"
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chaitanya Kulkarni 2020-10-06 16:36:47 -07:00 • committed by Greg Kroah-Hartman
commit b6df5afc3d
1 changed files with 3 additions and 1 deletions
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4
drivers/nvme/host/core.c
View file

@ -2606,8 +2606,10 @@ static int nvme_dev_open(struct inode *inode, struct file *file)
} }
nvme_get_ctrl(ctrl); nvme_get_ctrl(ctrl);
if (!try_module_get(ctrl->ops->module)) if (!try_module_get(ctrl->ops->module)) {
nvme_put_ctrl(ctrl);
return -EINVAL; return -EINVAL;
}
file->private_data = ctrl; file->private_data = ctrl;
return 0; return 0;