[CIFS] Fix oops in reset_cifs_unix_caps on reconnect
Signed-off-by: Steve French <sfrench@us.ibm.com>
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@ -1670,7 +1670,7 @@ void reset_cifs_unix_caps(int xid, struct cifsTconInfo * tcon,
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/* We might be setting the path sep back to a different
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form if we are reconnecting and the server switched its
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posix path capability for this share */
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if(CIFS_SB(sb)->prepathlen > 0)
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if(sb && (CIFS_SB(sb)->prepathlen > 0))
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CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
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cFYI(1,("Negotiate caps 0x%x",(int)cap));
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