sysfs_rps: Add negative test case for bad values

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>

diff --git a/tests/sysfs_rps.c b/tests/sysfs_rps.c
index 833c2e9..94c4382 100644 (file)
--- a/tests/sysfs_rps.c
+++ b/tests/sysfs_rps.c
@@ -74,12 +74,20 @@ static int readval(FILE *filp)
        return val;
 }
 
-static void writeval(FILE *filp, int val)
+static int do_writeval(FILE *filp, int val, int lerrno)
 {
+       /* Must write twice to sysfs since the first one simply calculates the size and won't return the error */
+       int ret;
        rewind(filp);
-       fprintf(filp, "%d", val);
+       ret = fprintf(filp, "%d", val);
+       rewind(filp);
+       ret = fprintf(filp, "%d", val);
+       if (ret && lerrno)
+               assert(errno = lerrno);
        fflush(filp);
+       return ret;
 }
+#define writeval(filp, val) do_writeval(filp, val, 0)
 
 #define fcur (readval(stuff[CUR].filp))
 #define fmin (readval(stuff[MIN].filp))
@@ -176,6 +184,9 @@ int main(int argc, char *argv[])
        writeval(stuff[MAX].filp, fmin - 1);
        checkit();
 
+       do_writeval(stuff[MIN].filp, 0x11111110, EINVAL);
+       do_writeval(stuff[MAX].filp, 0, EINVAL);
+
        writeval(stuff[MIN].filp, origmin);
        writeval(stuff[MAX].filp, origmax);