pnp: add acpi:* modalias entries

Along with the non-modalias conformant "pnp:*" aliases, we add "acpi:*"
entries to PNP drivers, to allow module autoloading by ACPI PNP device
entries, which export proper modalias information, without any specific
userspace modprobe mangling.

Cc: Adam Belay <ambx1@neo.rr.com>
Cc: Thomas Renninger <trenn@suse.de>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 16 insertions, 8 deletions

diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 37d5c363fbcd..1fcaf3284a6a 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -340,11 +340,18 @@ static int do_acpi_entry(const char *filename,
 }
 
 /* looks like: "pnp:dD" */
-static int do_pnp_entry(const char *filename,
-                        struct pnp_device_id *id, char *alias)
+static void do_pnp_device_entry(void *symval, unsigned long size,
+                                struct module *mod)
 {
-        sprintf(alias, "pnp:d%s*", id->id);
-        return 1;
+        const unsigned long id_size = sizeof(struct pnp_device_id);
+        const struct pnp_device_id *id = symval;
+
+        device_id_check(mod->name, "pnp", size, id_size, symval);
+
+        buf_printf(&mod->dev_table_buf,
+                   "MODULE_ALIAS(\"pnp:d%s*\");\n", id->id);
+        buf_printf(&mod->dev_table_buf,
+                   "MODULE_ALIAS(\"acpi*:%s:*\");\n", id->id);
 }
 
 /* looks like: "pnp:dD" for every device of the card */
@@ -388,9 +395,12 @@ static void do_pnp_card_entries(void *symval, unsigned long size,
                         }
 
                         /* add an individual alias for every device entry */
-                        if (!dup)
+                        if (!dup) {
                                 buf_printf(&mod->dev_table_buf,
                                            "MODULE_ALIAS(\"pnp:d%s*\");\n", id);
+                                buf_printf(&mod->dev_table_buf,
+                                           "MODULE_ALIAS(\"acpi*:%s:*\");\n", id);
+                        }
                 }
         }
 }
@@ -701,9 +711,7 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
                          sizeof(struct acpi_device_id), "acpi",
                          do_acpi_entry, mod);
         else if (sym_is(symname, "__mod_pnp_device_table"))
-                do_table(symval, sym->st_size,
-                         sizeof(struct pnp_device_id), "pnp",
-                         do_pnp_entry, mod);
+                do_pnp_device_entry(symval, sym->st_size, mod);
         else if (sym_is(symname, "__mod_pnp_card_device_table"))
                 do_pnp_card_entries(symval, sym->st_size, mod);
         else if (sym_is(symname, "__mod_pcmcia_device_table"))