Merge git://git.kernel.org/pub/scm/virt/kvm/kvm

[karo-tx-linux.git] / fs / cifs / cifs_unicode.c

diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c
index 53cf2aabce877ce2a8e15844ab667cf6f26a2d63..71d5d0a5f6b2fcc8487e0e3e575bf158f6922bd7 100644 (file)
--- a/fs/cifs/cifs_unicode.c
+++ b/fs/cifs/cifs_unicode.c
@@ -203,6 +203,27 @@ cifs_strtoUTF16(__le16 *to, const char *from, int len,
        int i;
        wchar_t wchar_to; /* needed to quiet sparse */
 
+       /* special case for utf8 to handle no plane0 chars */
+       if (!strcmp(codepage->charset, "utf8")) {
+               /*
+                * convert utf8 -> utf16, we assume we have enough space
+                * as caller should have assumed conversion does not overflow
+                * in destination len is length in wchar_t units (16bits)
+                */
+               i  = utf8s_to_utf16s(from, len, UTF16_LITTLE_ENDIAN,
+                                      (wchar_t *) to, len);
+
+               /* if success terminate and exit */
+               if (i >= 0)
+                       goto success;
+               /*
+                * if fails fall back to UCS encoding as this
+                * function should not return negative values
+                * currently can fail only if source contains
+                * invalid encoded characters
+                */
+       }
+
        for (i = 0; len && *from; i++, from += charlen, len -= charlen) {
                charlen = codepage->char2uni(from, len, &wchar_to);
                if (charlen < 1) {
@@ -215,6 +236,7 @@ cifs_strtoUTF16(__le16 *to, const char *from, int len,
                put_unaligned_le16(wchar_to, &to[i]);
        }
 
+success:
        put_unaligned_le16(0, &to[i]);
        return i;
 }