devio: fix stupid bug I introduced

diff --git a/Kernel/devio.c b/Kernel/devio.c
index 608b1e6..f1bad74 100644 (file)
--- a/Kernel/devio.c
+++ b/Kernel/devio.c
@@ -445,7 +445,7 @@ bool uninsq(struct s_queue *q, unsigned char *cp)
 int psleep_flags_io(void *p, unsigned char flags, usize_t *n)
 {
        if (flags & O_NDELAY) {
-               if (*n) {
+               if (!*n) {
                        *n = (usize_t)-1;
                        udata.u_error = EAGAIN;
                 }
@@ -453,7 +453,7 @@ int psleep_flags_io(void *p, unsigned char flags, usize_t *n)
        }
        psleep(p);
        if (udata.u_cursig || udata.u_ptab->p_pending) {        /* messy */
-               if (*n) {
+               if (!*n) {
                        *n = (usize_t)-1;
                         udata.u_error = EINTR;
                 }