diff --git a/drivers/staging/csr/csr_util.c b/drivers/staging/csr/csr_util.c
index f7fd3fb7b506..fa6025a59c98 100644
--- a/drivers/staging/csr/csr_util.c
+++ b/drivers/staging/csr/csr_util.c
@@ -50,11 +50,6 @@ size_t CsrStrLen(const char *string)
     return strlen(string);
 }
 EXPORT_SYMBOL_GPL(CsrStrLen);
-
-char *CsrStrChr(const char *string, char c)
-{
-    return strchr(string, c);
-}
 #endif
 
 s32 CsrVsnprintf(char *string, size_t count, const char *format, va_list args)
diff --git a/drivers/staging/csr/csr_util.h b/drivers/staging/csr/csr_util.h
index 95030fa29ce7..024b520a1bb9 100644
--- a/drivers/staging/csr/csr_util.h
+++ b/drivers/staging/csr/csr_util.h
@@ -28,11 +28,9 @@ void CsrUInt16ToHex(u16 number, char *str);
 /*------------------------------------------------------------------*/
 #ifdef CSR_USE_STDC_LIB
 #define CsrMemCpy memcpy
-#define CsrStrChr strchr
 #define CsrStrLen strlen
 #else /* !CSR_USE_STDC_LIB */
 void *CsrMemCpy(void *dest, const void *src, size_t count);
-char *CsrStrChr(const char *string, char c);
 size_t CsrStrLen(const char *string);
 #endif /* !CSR_USE_STDC_LIB */
 s32 CsrVsnprintf(char *string, size_t count, const char *format, va_list args);