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Date:      Mon, 2 Mar 2020 09:16:48 +0000 (UTC)
From:      Hans Petter Selasky <hselasky@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org
Subject:   svn commit: r358536 - stable/11/sys/dev/acpica
Message-ID:  <202003020916.0229Gmka054518@repo.freebsd.org>
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Author: hselasky
Date: Mon Mar  2 09:16:48 2020
New Revision: 358536
URL: https://svnweb.freebsd.org/changeset/base/358536

Log:
  MFC r358219 and r358270:
  Make sure the ACPI lid state is updated during boot and after resume.
  While at it update the sysctl(9) description for the lid state.
  
  Always check return value from acpi_GetInteger().
  If a failure happens reading the lid state, assume the lid is opened.
  
  Differential Revision:	https://reviews.freebsd.org/D23724
  PR:		240881
  Submitted by:	Yuri Pankov <yuripv@yuripv.me>
  Sponsored by:	Mellanox Technologies

Modified:
  stable/11/sys/dev/acpica/acpi_lid.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/dev/acpica/acpi_lid.c
==============================================================================
--- stable/11/sys/dev/acpica/acpi_lid.c	Mon Mar  2 09:13:26 2020	(r358535)
+++ stable/11/sys/dev/acpica/acpi_lid.c	Mon Mar  2 09:16:48 2020	(r358536)
@@ -84,6 +84,27 @@ static devclass_t acpi_lid_devclass;
 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0);
 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1);
 
+static void
+acpi_lid_status_update(struct acpi_lid_softc *sc)
+{
+	ACPI_STATUS status;
+	int lid_status;
+
+	ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+
+	/*
+	 * Evaluate _LID and check the return value, update lid status.
+	 *	Zero:		The lid is closed
+	 *	Non-zero:	The lid is open
+	 */
+	status = acpi_GetInteger(sc->lid_handle, "_LID", &lid_status);
+	if (ACPI_FAILURE(status))
+		lid_status = 1;		/* assume lid is opened */
+
+	/* range check value */
+	sc->lid_status = lid_status ? 1 : 0;
+}
+
 static int
 acpi_lid_probe(device_t dev)
 {
@@ -122,13 +143,16 @@ acpi_lid_attach(device_t dev)
     if (acpi_parse_prw(sc->lid_handle, &prw) == 0)
 	AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
 
+    /* Get the initial lid status */
+    acpi_lid_status_update(sc);
+
     /*
      * Export the lid status
      */
     SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
 	SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
 	"state", CTLFLAG_RD, &sc->lid_status, 0,
-	"Device set to wake the system");
+	"Device state (0 = closed, 1 = open)");
 
     return (0);
 }
@@ -142,6 +166,13 @@ acpi_lid_suspend(device_t dev)
 static int
 acpi_lid_resume(device_t dev)
 {
+    struct acpi_lid_softc	*sc;
+
+    sc = device_get_softc(dev);
+
+    /* Update lid status, if any */
+    acpi_lid_status_update(sc);
+
     return (0);
 }
 
@@ -150,21 +181,14 @@ acpi_lid_notify_status_changed(void *arg)
 {
     struct acpi_lid_softc	*sc;
     struct acpi_softc		*acpi_sc;
-    ACPI_STATUS			status;
 
     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 
     sc = (struct acpi_lid_softc *)arg;
     ACPI_SERIAL_BEGIN(lid);
 
-    /*
-     * Evaluate _LID and check the return value, update lid status.
-     *	Zero:		The lid is closed
-     *	Non-zero:	The lid is open
-     */
-    status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status);
-    if (ACPI_FAILURE(status))
-	goto out;
+    /* Update lid status, if any */
+    acpi_lid_status_update(sc);
 
     acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
     if (acpi_sc == NULL)

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