MODULE_DEVICE_TABLE(isapnp, ...) does nothing

On Monday 23 November 2009 04:29:53 Rusty Russell wrote:
> On Mon, 23 Nov 2009 07:31:57 am Ondrej Zary wrote:
> > The problem is that
> > scripts/mod/file2alias.c simply ignores isapnp.
>
> AFAICT it always has, and noone has complained until now.  Perhaps
> something was still reading /lib/modules/`uname -r`/modules.isapnpmap?

The patch below works fine (at least with Debian). It needs your first
patch that moves the definitions to mod_devicetable.h. Verified that
aliases for these modules are generated correctly:

drivers/media/radio/radio-sf16fmi.c
drivers/net/ne.c
drivers/net/3c515.c
drivers/net/smc-ultra.c
drivers/pcmcia/i82365.c
drivers/scsi/aha1542.c
drivers/scsi/aha152x.c
drivers/scsi/sym53c416.c
drivers/scsi/g_NCR5380.c

Tested with RTL8019AS (ne), AVA-1505AE (aha152x) and dtc436e (g_NCR5380)
cards - they now work automatically.

Generate pnp:d aliases for isapnp_device_tables. This allows udev to load
these modules automatically.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

scripts/mod/file2alias.c

@@ -806,6 +806,19 @@ static int do_zorro_entry(const char *filename, struct zorro_device_id *id,
 	return 1;
 }
 
+/* looks like: "pnp:dD" */
+static int do_isapnp_entry(const char *filename,
+			   struct isapnp_device_id *id, char *alias)
+{
+	sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
+		'A' + ((id->vendor >> 2) & 0x3f) - 1,
+		'A' + (((id->vendor & 3) << 3) | ((id->vendor >> 13) & 7)) - 1,
+		'A' + ((id->vendor >> 8) & 0x1f) - 1,
+		(id->function >> 4) & 0x0f, id->function & 0x0f,
+		(id->function >> 12) & 0x0f, (id->function >> 8) & 0x0f);
+	return 1;
+}
+
 /* Ignore any prefix, eg. some architectures prepend _ */
 static inline int sym_is(const char *symbol, const char *name)
 {
@@ -957,6 +970,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
 		do_table(symval, sym->st_size,
 			 sizeof(struct zorro_device_id), "zorro",
 			 do_zorro_entry, mod);
+	else if (sym_is(symname, "__mod_isapnp_device_table"))
+		do_table(symval, sym->st_size,
+			sizeof(struct isapnp_device_id), "isa",
+			do_isapnp_entry, mod);
 	free(zeros);
 }