ahci: save a few loop hops in detectahci

1 files changed, 3 insertions, 2 deletions

diff --git a/src/ahci.c b/src/ahci.c
index a0099f1..9633951 100644
--- a/src/ahci.c
+++ b/src/ahci.c
@@ -412,10 +412,11 @@ ahci_detect(void *data)
 {
     struct ahci_ctrl_s *ctrl = data;
     struct ahci_port_s *port;
-    u32 pnr;
+    u32 pnr, max;
     int rc;
 
-    for (pnr = 0; pnr < 32; pnr++) {
+    max = ctrl->caps & 0x1f;
+    for (pnr = 0; pnr < max; pnr++) {
         if (!(ctrl->ports & (1 << pnr)))
             continue;
         dprintf(2, "AHCI/%d: probing\n", pnr);