[PATCH] EISA bus MODALIAS attributes support

Add modalias attribute support for the almost forgotten now EISA bus and
(at least some) EISA-aware modules.

The modalias entry looks like (for an 3c509 NIC):

 eisa:sTCM5093

and the in-module alias like:

 eisa:sTCM5093*

The patch moves struct eisa_device_id declaration from include/linux/eisa.h
to include/linux/mod_devicetable.h (so that the former now #includes the
latter), adds proper MODULE_DEVICE_TABLE(eisa, ...) statements for all
drivers with EISA IDs I found (some drivers already have that DEVICE_TABLE
declared), and adds recognision of __mod_eisa_device_table to
scripts/mod/file2alias.c so that proper modules.alias will be generated.

There's no support for /lib/modules/$kver/modules.eisamap, as it's not used
by any existing tools, and because with in-kernel modalias mechanism those
maps are obsolete anyway.

The rationale for this patch is:

 a) to make EISA bus to act as other busses with modalias
    support, to unify driver loading

 b) to foget about EISA finally - with this patch, kernel
    (who still supports EISA) will be the only one who knows
    how to choose the necessary drivers for this bus ;)

[akpm@osdl.org: fix the kbuild bit]
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Acked-the-net-bits-by: Jeff Garzik <jeff@garzik.org>
Acked-the-tulip-bit-by: Valerie Henson <val_henson@linux.intel.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/eisa/eisa-bus.c b/drivers/eisa/eisa-bus.c
index 6078e2f5881..3a365e159d8 100644
--- a/drivers/eisa/eisa-bus.c
+++ b/drivers/eisa/eisa-bus.c
@@ -128,9 +128,23 @@ static int eisa_bus_match (struct device *dev, struct device_driver *drv)
 	return 0;
 }
 
+static int eisa_bus_uevent(struct device *dev, char **envp, int num_envp,
+			   char *buffer, int buffer_size)
+{
+	struct eisa_device *edev = to_eisa_device(dev);
+	int i = 0;
+	int length = 0;
+
+	add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
+		       "MODALIAS=" EISA_DEVICE_MODALIAS_FMT, edev->id.sig);
+	envp[i] = NULL;
+	return 0;
+}
+
 struct bus_type eisa_bus_type = {
 	.name  = "eisa",
 	.match = eisa_bus_match,
+	.uevent = eisa_bus_uevent,
 };
 
 int eisa_driver_register (struct eisa_driver *edrv)
@@ -160,6 +174,14 @@ static ssize_t eisa_show_state (struct device *dev, struct device_attribute *att
 
 static DEVICE_ATTR(enabled, S_IRUGO, eisa_show_state, NULL);
 
+static ssize_t eisa_show_modalias (struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct eisa_device *edev = to_eisa_device (dev);
+        return sprintf (buf, EISA_DEVICE_MODALIAS_FMT "\n", edev->id.sig);
+}
+
+static DEVICE_ATTR(modalias, S_IRUGO, eisa_show_modalias, NULL);
+
 static int __init eisa_init_device (struct eisa_root_device *root,
 				    struct eisa_device *edev,
 				    int slot)
@@ -209,6 +231,7 @@ static int __init eisa_register_device (struct eisa_device *edev)
 
 	device_create_file (&edev->dev, &dev_attr_signature);
 	device_create_file (&edev->dev, &dev_attr_enabled);
+	device_create_file (&edev->dev, &dev_attr_modalias);
 
 	return 0;
 }