root/drivers/acpi/blacklist.c

DEFINITIONS

1. acpi_blacklisted
2. dmi_enable_rev_override

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  blacklist.c
   4  *
   5  *  Check to see if the given machine has a known bad ACPI BIOS
   6  *  or if the BIOS is too old.
   7  *  Check given machine against acpi_rev_dmi_table[].
   8  *
   9  *  Copyright (C) 2004 Len Brown <len.brown@intel.com>
  10  *  Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
  11  */
  12 
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/acpi.h>
  16 #include <linux/dmi.h>
  17 
  18 #include "internal.h"
  19 
  20 #ifdef CONFIG_DMI
  21 static const struct dmi_system_id acpi_rev_dmi_table[] __initconst;
  22 #endif
  23 
  24 /*
  25  * POLICY: If *anything* doesn't work, put it on the blacklist.
  26  *         If they are critical errors, mark it critical, and abort driver load.
  27  */
  28 static struct acpi_platform_list acpi_blacklist[] __initdata = {
  29         /* Compaq Presario 1700 */
  30         {"PTLTD ", "  DSDT  ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal,
  31          "Multiple problems", 1},
  32         /* Sony FX120, FX140, FX150? */
  33         {"SONY  ", "U0      ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,
  34          "ACPI driver problem", 1},
  35         /* Compaq Presario 800, Insyde BIOS */
  36         {"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal,
  37          "Does not use _REG to protect EC OpRegions", 1},
  38         /* IBM 600E - _ADR should return 7, but it returns 1 */
  39         {"IBM   ", "TP600E  ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
  40          "Incorrect _ADR", 1},
  41 
  42         { }
  43 };
  44 
  45 int __init acpi_blacklisted(void)
  46 {
  47         int i;
  48         int blacklisted = 0;
  49 
  50         i = acpi_match_platform_list(acpi_blacklist);
  51         if (i >= 0) {
  52                 pr_err(PREFIX "Vendor \"%6.6s\" System \"%8.8s\" Revision 0x%x has a known ACPI BIOS problem.\n",
  53                        acpi_blacklist[i].oem_id,
  54                        acpi_blacklist[i].oem_table_id,
  55                        acpi_blacklist[i].oem_revision);
  56 
  57                 pr_err(PREFIX "Reason: %s. This is a %s error\n",
  58                        acpi_blacklist[i].reason,
  59                        (acpi_blacklist[i].data ?
  60                         "non-recoverable" : "recoverable"));
  61 
  62                 blacklisted = acpi_blacklist[i].data;
  63         }
  64 
  65         (void)early_acpi_osi_init();
  66 #ifdef CONFIG_DMI
  67         dmi_check_system(acpi_rev_dmi_table);
  68 #endif
  69 
  70         return blacklisted;
  71 }
  72 #ifdef CONFIG_DMI
  73 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
  74 static int __init dmi_enable_rev_override(const struct dmi_system_id *d)
  75 {
  76         printk(KERN_NOTICE PREFIX "DMI detected: %s (force ACPI _REV to 5)\n",
  77                d->ident);
  78         acpi_rev_override_setup(NULL);
  79         return 0;
  80 }
  81 #endif
  82 
  83 static const struct dmi_system_id acpi_rev_dmi_table[] __initconst = {
  84 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
  85         /*
  86          * DELL XPS 13 (2015) switches sound between HDA and I2S
  87          * depending on the ACPI _REV callback. If userspace supports
  88          * I2S sufficiently (or if you do not care about sound), you
  89          * can safely disable this quirk.
  90          */
  91         {
  92          .callback = dmi_enable_rev_override,
  93          .ident = "DELL XPS 13 (2015)",
  94          .matches = {
  95                       DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
  96                       DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9343"),
  97                 },
  98         },
  99         {
 100          .callback = dmi_enable_rev_override,
 101          .ident = "DELL Precision 5520",
 102          .matches = {
 103                       DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 104                       DMI_MATCH(DMI_PRODUCT_NAME, "Precision 5520"),
 105                 },
 106         },
 107         {
 108          .callback = dmi_enable_rev_override,
 109          .ident = "DELL Precision 3520",
 110          .matches = {
 111                       DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 112                       DMI_MATCH(DMI_PRODUCT_NAME, "Precision 3520"),
 113                 },
 114         },
 115         /*
 116          * Resolves a quirk with the Dell Latitude 3350 that
 117          * causes the ethernet adapter to not function.
 118          */
 119         {
 120          .callback = dmi_enable_rev_override,
 121          .ident = "DELL Latitude 3350",
 122          .matches = {
 123                       DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 124                       DMI_MATCH(DMI_PRODUCT_NAME, "Latitude 3350"),
 125                 },
 126         },
 127         {
 128          .callback = dmi_enable_rev_override,
 129          .ident = "DELL Inspiron 7537",
 130          .matches = {
 131                       DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 132                       DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7537"),
 133                 },
 134         },
 135 #endif
 136         {}
 137 };
 138 
 139 #endif /* CONFIG_DMI */