grub2/0214-Fix-USB-devices-not-being-detected-when-requested.patch

From 1d79a30acc9b9cf67c9d669a2a57b3ce26683ff6 Mon Sep 17 00:00:00 2001
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Date: Tue, 19 Mar 2013 20:35:21 +0100
Subject: [PATCH 214/471] 	Fix USB devices not being detected when
 requested 	due to delayed attach.

---
 ChangeLog                      |  5 +++++
 grub-core/bus/usb/usbhub.c     | 29 ++++++++++++++++++++++++-----
 grub-core/commands/keystatus.c |  2 +-
 grub-core/commands/terminal.c  | 12 ++++++++++--
 grub-core/commands/usbtest.c   |  2 +-
 grub-core/disk/usbms.c         |  5 +++--
 grub-core/kern/term.c          |  4 ++--
 include/grub/term.h            |  2 +-
 include/grub/usb.h             |  2 +-
 9 files changed, 48 insertions(+), 15 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 94dd5bb..725fbe2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2013-03-19  Vladimir Serbinenko  <phcoder@gmail.com>
 
+	Fix USB devices not being detected when requested
+	due to delayed attach.
+
+2013-03-19  Vladimir Serbinenko  <phcoder@gmail.com>
+
 	Implement boot time analysis framework.
 
 2013-03-19  Vladimir Serbinenko  <phcoder@gmail.com>
diff --git a/grub-core/bus/usb/usbhub.c b/grub-core/bus/usb/usbhub.c
index f95a567..253e49f 100644
--- a/grub-core/bus/usb/usbhub.c
+++ b/grub-core/bus/usb/usbhub.c
@@ -29,6 +29,7 @@
 static struct grub_usb_device *grub_usb_devs[GRUB_USBHUB_MAX_DEVICES];
 
 static int rescan = 0;
+static int npending = 0;
 
 struct grub_usb_hub
 {
@@ -227,21 +228,33 @@ attach_root_port (struct grub_usb_hub *hub, int portno,
       if (current_speed == GRUB_USB_SPEED_NONE)
         i = 0;
     }
+
+  grub_boot_time ("After the stable power wait portno=%d", portno);
+
   grub_dprintf ("usb", "total=%d\n", total);
   if (total >= 2000)
-    return;
+    {
+      grub_boot_time ("Root port timeout");
+      return;
+    }
+
+  grub_boot_time ("After detect_dev");
 
   /* Enable the port.  */
   err = hub->controller->dev->portstatus (hub->controller, portno, 1);
   if (err)
     return;
   hub->controller->dev->pending_reset = grub_get_time_ms () + 5000;
+  npending++;
 
   grub_millisleep (10);
 
+  grub_boot_time ("Port enabled");
+
   /* Enable the port and create a device.  */
   dev = grub_usb_hub_add_dev (hub->controller, speed, portno, 0);
   hub->controller->dev->pending_reset = 0;
+  npending--;
   if (! dev)
     return;
 
@@ -475,6 +488,7 @@ poll_nonroot_hub (grub_usb_device_t dev)
 	       * anywhere on the same OHCI controller until
 	       * we will finish addressing of reseted device ! */
               dev->controller.dev->pending_reset = grub_get_time_ms () + 5000;
+	      npending++;
               return;
 	    }
 	}
@@ -510,7 +524,11 @@ poll_nonroot_hub (grub_usb_device_t dev)
 
 	      /* Add the device and assign a device address to it.  */
 	      next_dev = grub_usb_hub_add_dev (&dev->controller, speed, i, dev->addr);
-	      dev->controller.dev->pending_reset = 0;
+	      if (dev->controller.dev->pending_reset)
+		{
+		  dev->controller.dev->pending_reset = 0;
+		  npending--;
+		}
 	      if (! next_dev)
 		continue;
 
@@ -525,7 +543,7 @@ poll_nonroot_hub (grub_usb_device_t dev)
 }
 
 void
-grub_usb_poll_devices (void)
+grub_usb_poll_devices (int wait_for_completion)
 {
   struct grub_usb_hub *hub;
   int i;
@@ -539,7 +557,7 @@ grub_usb_poll_devices (void)
 	  grub_usb_speed_t speed = GRUB_USB_SPEED_NONE;
 	  int changed = 0;
 
-          if (!hub->controller->dev->pending_reset)
+          if (hub->controller->dev->pending_reset)
             {
               /* Check for possible timeout */
               if (grub_get_time_ms () > hub->controller->dev->pending_reset)
@@ -547,6 +565,7 @@ grub_usb_poll_devices (void)
                   /* Something went wrong, reset device was not
                    * addressed properly, timeout happened */
 	          hub->controller->dev->pending_reset = 0;
+		  npending--;
 	          speed = hub->controller->dev->detect_dev (hub->controller,
                                                             i, &changed);
                 }
@@ -573,7 +592,7 @@ grub_usb_poll_devices (void)
 	  if (dev && dev->descdev.class == 0x09)
 	    poll_nonroot_hub (dev);
 	}
-      if (!rescan)
+      if (!(rescan || (npending && wait_for_completion)))
 	break;
       grub_millisleep (50);
     }
diff --git a/grub-core/commands/keystatus.c b/grub-core/commands/keystatus.c
index 0925c6a..460cf4e 100644
--- a/grub-core/commands/keystatus.c
+++ b/grub-core/commands/keystatus.c
@@ -42,7 +42,7 @@ grub_getkeystatus (void)
   grub_term_input_t term;
 
   if (grub_term_poll_usb)
-    grub_term_poll_usb ();
+    grub_term_poll_usb (0);
 
   FOR_ACTIVE_TERM_INPUTS(term)
   {
diff --git a/grub-core/commands/terminal.c b/grub-core/commands/terminal.c
index 425a411..3002186 100644
--- a/grub-core/commands/terminal.c
+++ b/grub-core/commands/terminal.c
@@ -108,9 +108,9 @@ handle_command (int argc, char **args, struct abstract_terminal **enabled,
          if (term)
            break;
          if (again)
-           return grub_error (GRUB_ERR_BAD_ARGUMENT,
+	   return grub_error (GRUB_ERR_BAD_ARGUMENT,
 			      N_("terminal `%s' isn't found"),
-                              args[i]);
+			      args[i]);
          for (aut = autoloads; aut; aut = aut->next)
            if (grub_strcmp (args[i], aut->name) == 0
 	       || (grub_strcmp (args[i], "ofconsole") == 0
@@ -126,6 +126,14 @@ handle_command (int argc, char **args, struct abstract_terminal **enabled,
                grub_errno = GRUB_ERR_NONE;
                break;
              }
+	 if (grub_memcmp (args[i], "serial_usb",
+				  sizeof ("serial_usb") - 1) == 0
+	     && grub_term_poll_usb)
+	   {
+	     grub_term_poll_usb (1);
+	     again = 1;
+	     continue;
+	   }
          if (!aut)
            return grub_error (GRUB_ERR_BAD_ARGUMENT,
 			      N_("terminal `%s' isn't found"),
diff --git a/grub-core/commands/usbtest.c b/grub-core/commands/usbtest.c
index af35b8c..01cdca9 100644
--- a/grub-core/commands/usbtest.c
+++ b/grub-core/commands/usbtest.c
@@ -196,7 +196,7 @@ grub_cmd_usbtest (grub_command_t cmd __attribute__ ((unused)),
 		  int argc __attribute__ ((unused)),
 		  char **args __attribute__ ((unused)))
 {
-  grub_usb_poll_devices ();
+  grub_usb_poll_devices (1);
 
   grub_printf ("USB devices:\n\n");
   grub_usb_iterate (usb_iterate, NULL);
diff --git a/grub-core/disk/usbms.c b/grub-core/disk/usbms.c
index 2cfc537..da01be3 100644
--- a/grub-core/disk/usbms.c
+++ b/grub-core/disk/usbms.c
@@ -277,7 +277,7 @@ grub_usbms_iterate (grub_scsi_dev_iterate_hook_t hook, void *hook_data,
   if (pull != GRUB_DISK_PULL_NONE)
     return 0;
 
-  grub_usb_poll_devices ();
+  grub_usb_poll_devices (1);
 
   for (i = 0; i < ARRAY_SIZE (grub_usbms_devices); i++)
     if (grub_usbms_devices[i])
@@ -611,7 +611,8 @@ grub_usbms_open (int id, int devnum, struct grub_scsi *scsi)
     return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
 		       "not USB Mass Storage device");
 
-  grub_usb_poll_devices ();
+  if (!grub_usbms_devices[devnum])
+    grub_usb_poll_devices (1);
 
   if (!grub_usbms_devices[devnum])
     return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
diff --git a/grub-core/kern/term.c b/grub-core/kern/term.c
index 44ada25..66c5971 100644
--- a/grub-core/kern/term.c
+++ b/grub-core/kern/term.c
@@ -32,7 +32,7 @@ struct grub_term_input *grub_term_inputs;
 grub_uint8_t grub_term_normal_color = GRUB_TERM_DEFAULT_NORMAL_COLOR;
 grub_uint8_t grub_term_highlight_color = GRUB_TERM_DEFAULT_HIGHLIGHT_COLOR;
 
-void (*grub_term_poll_usb) (void) = NULL;
+void (*grub_term_poll_usb) (int wait_for_completion) = NULL;
 void (*grub_net_poll_cards_idle) (void) = NULL;
 
 /* Put a Unicode character.  */
@@ -90,7 +90,7 @@ grub_getkey_noblock (void)
   grub_term_input_t term;
 
   if (grub_term_poll_usb)
-    grub_term_poll_usb ();
+    grub_term_poll_usb (0);
 
   if (grub_net_poll_cards_idle)
     grub_net_poll_cards_idle ();
diff --git a/include/grub/term.h b/include/grub/term.h
index 84f5766..655a5e3 100644
--- a/include/grub/term.h
+++ b/include/grub/term.h
@@ -467,7 +467,7 @@ grub_print_spaces (struct grub_term_output *term, int number_spaces)
     grub_putcode (' ', term);
 }
 
-extern void (*EXPORT_VAR (grub_term_poll_usb)) (void);
+extern void (*EXPORT_VAR (grub_term_poll_usb)) (int wait_for_completion);
 
 #define GRUB_TERM_REPEAT_PRE_INTERVAL 400
 #define GRUB_TERM_REPEAT_INTERVAL 50
diff --git a/include/grub/usb.h b/include/grub/usb.h
index 32f0ecd..7164dd5 100644
--- a/include/grub/usb.h
+++ b/include/grub/usb.h
@@ -291,7 +291,7 @@ struct grub_usb_attach_desc
 void grub_usb_register_attach_hook_class (struct grub_usb_attach_desc *desc);
 void grub_usb_unregister_attach_hook_class (struct grub_usb_attach_desc *desc);
 
-void grub_usb_poll_devices (void);
+void grub_usb_poll_devices (int wait_for_completion);
 
 void grub_usb_device_attach (grub_usb_device_t dev);
 grub_usb_err_t
-- 
1.8.2.1