smb: client: fix warning in CIFSFindNext()

This fixes the following warning reported by kernel test robot

  fs/smb/client/cifssmb.c:4216 CIFSFindNext() warn: missing error
  code? 'rc'

Link: https://lore.kernel.org/all/202306170124.CtQqzf0I-lkp@intel.com/
Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c
index 25d2509..19f7385 100644 (file)
--- a/fs/smb/client/cifssmb.c
+++ b/fs/smb/client/cifssmb.c
@@ -4099,11 +4099,12 @@ int CIFSFindNext(const unsigned int xid, struct cifs_tcon *tcon,
        TRANSACTION2_FNEXT_REQ *pSMB = NULL;
        TRANSACTION2_FNEXT_RSP *pSMBr = NULL;
        T2_FNEXT_RSP_PARMS *parms;
-       char *response_data;
-       int rc = 0;
-       int bytes_returned;
        unsigned int name_len;
+       unsigned int lnoff;
        __u16 params, byte_count;
+       char *response_data;
+       int bytes_returned;
+       int rc = 0;
 
        cifs_dbg(FYI, "In FindNext\n");
 
@@ -4148,8 +4149,8 @@ int CIFSFindNext(const unsigned int xid, struct cifs_tcon *tcon,
                pSMB->ResumeFileName[name_len] = 0;
                pSMB->ResumeFileName[name_len+1] = 0;
        } else {
-               rc = -EINVAL;
-               goto FNext2_err_exit;
+               cifs_buf_release(pSMB);
+               return -EINVAL;
        }
        byte_count = params + 1 /* pad */ ;
        pSMB->TotalParameterCount = cpu_to_le16(params);
@@ -4160,71 +4161,61 @@ int CIFSFindNext(const unsigned int xid, struct cifs_tcon *tcon,
        rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
                        (struct smb_hdr *) pSMBr, &bytes_returned, 0);
        cifs_stats_inc(&tcon->stats.cifs_stats.num_fnext);
+
        if (rc) {
+               cifs_buf_release(pSMB);
                if (rc == -EBADF) {
                        psrch_inf->endOfSearch = true;
-                       cifs_buf_release(pSMB);
                        rc = 0; /* search probably was closed at end of search*/
-               } else
+               } else {
                        cifs_dbg(FYI, "FindNext returned = %d\n", rc);
-       } else {                /* decode response */
-               rc = validate_t2((struct smb_t2_rsp *)pSMBr);
-
-               if (rc == 0) {
-                       unsigned int lnoff;
-
-                       /* BB fixme add lock for file (srch_info) struct here */
-                       if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE)
-                               psrch_inf->unicode = true;
-                       else
-                               psrch_inf->unicode = false;
-                       response_data = (char *) &pSMBr->hdr.Protocol +
-                              le16_to_cpu(pSMBr->t2.ParameterOffset);
-                       parms = (T2_FNEXT_RSP_PARMS *)response_data;
-                       response_data = (char *)&pSMBr->hdr.Protocol +
-                               le16_to_cpu(pSMBr->t2.DataOffset);
-                       if (psrch_inf->smallBuf)
-                               cifs_small_buf_release(
-                                       psrch_inf->ntwrk_buf_start);
-                       else
-                               cifs_buf_release(psrch_inf->ntwrk_buf_start);
-                       psrch_inf->srch_entries_start = response_data;
-                       psrch_inf->ntwrk_buf_start = (char *)pSMB;
-                       psrch_inf->smallBuf = false;
-                       if (parms->EndofSearch)
-                               psrch_inf->endOfSearch = true;
-                       else
-                               psrch_inf->endOfSearch = false;
-                       psrch_inf->entries_in_buffer =
-                                               le16_to_cpu(parms->SearchCount);
-                       psrch_inf->index_of_last_entry +=
-                               psrch_inf->entries_in_buffer;
-                       lnoff = le16_to_cpu(parms->LastNameOffset);
-                       if (CIFSMaxBufSize < lnoff) {
-                               cifs_dbg(VFS, "ignoring corrupt resume name\n");
-                               psrch_inf->last_entry = NULL;
-                               return rc;
-                       } else
-                               psrch_inf->last_entry =
-                                       psrch_inf->srch_entries_start + lnoff;
-
-/*  cifs_dbg(FYI, "fnxt2 entries in buf %d index_of_last %d\n",
-    psrch_inf->entries_in_buffer, psrch_inf->index_of_last_entry); */
-
-                       /* BB fixme add unlock here */
                }
+               return rc;
+       }
 
+       /* decode response */
+       rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+       if (rc) {
+               cifs_buf_release(pSMB);
+               return rc;
        }
+       /* BB fixme add lock for file (srch_info) struct here */
+       psrch_inf->unicode = !!(pSMBr->hdr.Flags2 & SMBFLG2_UNICODE);
+       response_data = (char *)&pSMBr->hdr.Protocol +
+               le16_to_cpu(pSMBr->t2.ParameterOffset);
+       parms = (T2_FNEXT_RSP_PARMS *)response_data;
+       response_data = (char *)&pSMBr->hdr.Protocol +
+               le16_to_cpu(pSMBr->t2.DataOffset);
 
-       /* BB On error, should we leave previous search buf (and count and
-       last entry fields) intact or free the previous one? */
+       if (psrch_inf->smallBuf)
+               cifs_small_buf_release(psrch_inf->ntwrk_buf_start);
+       else
+               cifs_buf_release(psrch_inf->ntwrk_buf_start);
 
-       /* Note: On -EAGAIN error only caller can retry on handle based calls
-       since file handle passed in no longer valid */
-FNext2_err_exit:
-       if (rc != 0)
-               cifs_buf_release(pSMB);
-       return rc;
+       psrch_inf->srch_entries_start = response_data;
+       psrch_inf->ntwrk_buf_start = (char *)pSMB;
+       psrch_inf->smallBuf = false;
+       psrch_inf->endOfSearch = !!parms->EndofSearch;
+       psrch_inf->entries_in_buffer = le16_to_cpu(parms->SearchCount);
+       psrch_inf->index_of_last_entry += psrch_inf->entries_in_buffer;
+       lnoff = le16_to_cpu(parms->LastNameOffset);
+       if (CIFSMaxBufSize < lnoff) {
+               cifs_dbg(VFS, "ignoring corrupt resume name\n");
+               psrch_inf->last_entry = NULL;
+       } else {
+               psrch_inf->last_entry =
+                       psrch_inf->srch_entries_start + lnoff;
+       }
+       /* BB fixme add unlock here */
+
+       /*
+        * BB: On error, should we leave previous search buf
+        * (and count and last entry fields) intact or free the previous one?
+        *
+        * Note: On -EAGAIN error only caller can retry on handle based calls
+        * since file handle passed in no longer valid.
+        */
+       return 0;
 }
 
 int