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cifs: add refcounting to cifs_readdata structures

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This isn't strictly necessary for the async readpages code, but the
uncached version will need to be able to collect the replies after
issuing the calls. Add a kref to cifs_readdata and use change the
code to take and put references appropriately.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
This commit is contained in:
Jeff Layton
2012-05-16 07:13:17 -04:00
committed by Steve French
parent 8d5ce4d23c
commit 6993f74a5b
3 changed files with 19 additions and 7 deletions
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3
fs/cifs/cifssmb.c
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@@ -1635,12 +1635,15 @@ cifs_async_readv(struct cifs_readdata *rdata)
rdata->iov[0].iov_base = smb;
rdata->iov[0].iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4;
kref_get(&rdata->refcount);
rc = cifs_call_async(tcon->ses->server, rdata->iov, 1,
cifs_readv_receive, cifs_readv_callback,
rdata, false);
if (rc == 0)
cifs_stats_inc(&tcon->num_reads);
else
kref_put(&rdata->refcount, cifs_readdata_release);
cifs_small_buf_release(smb);
return rc;