[PATCH] IPMI: Fix device model name
Add the product id to the driver model platform device name, in addition to
the device id. The IPMI spec does not require that individual BMCs in a
system have unique devices IDs, but it does require that the product id/device
id combination be unique.
This also removes a redundant check and cleans up error handling
when the sysfs registration fails.
Signed-off-by: Corey Minyard <minyard@acm.org>
Cc: Carol Hebert <cah@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index c47add8..da13df4 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -1817,13 +1817,12 @@
struct bmc_device *bmc = dev_get_drvdata(dev);
return (bmc->id.product_id == id->product_id
- && bmc->id.product_id == id->product_id
&& bmc->id.device_id == id->device_id);
}
static struct bmc_device *ipmi_find_bmc_prod_dev_id(
struct device_driver *drv,
- unsigned char product_id, unsigned char device_id)
+ unsigned int product_id, unsigned char device_id)
{
struct prod_dev_id id = {
.product_id = product_id,
@@ -1940,6 +1939,9 @@
static void remove_files(struct bmc_device *bmc)
{
+ if (!bmc->dev)
+ return;
+
device_remove_file(&bmc->dev->dev,
&bmc->device_id_attr);
device_remove_file(&bmc->dev->dev,
@@ -1973,7 +1975,8 @@
bmc = container_of(ref, struct bmc_device, refcount);
remove_files(bmc);
- platform_device_unregister(bmc->dev);
+ if (bmc->dev)
+ platform_device_unregister(bmc->dev);
kfree(bmc);
}
@@ -1990,6 +1993,7 @@
mutex_lock(&ipmidriver_mutex);
kref_put(&bmc->refcount, cleanup_bmc_device);
+ intf->bmc = NULL;
mutex_unlock(&ipmidriver_mutex);
}
@@ -1997,6 +2001,56 @@
{
int err;
+ bmc->device_id_attr.attr.name = "device_id";
+ bmc->device_id_attr.attr.owner = THIS_MODULE;
+ bmc->device_id_attr.attr.mode = S_IRUGO;
+ bmc->device_id_attr.show = device_id_show;
+
+ bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs";
+ bmc->provides_dev_sdrs_attr.attr.owner = THIS_MODULE;
+ bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO;
+ bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show;
+
+ bmc->revision_attr.attr.name = "revision";
+ bmc->revision_attr.attr.owner = THIS_MODULE;
+ bmc->revision_attr.attr.mode = S_IRUGO;
+ bmc->revision_attr.show = revision_show;
+
+ bmc->firmware_rev_attr.attr.name = "firmware_revision";
+ bmc->firmware_rev_attr.attr.owner = THIS_MODULE;
+ bmc->firmware_rev_attr.attr.mode = S_IRUGO;
+ bmc->firmware_rev_attr.show = firmware_rev_show;
+
+ bmc->version_attr.attr.name = "ipmi_version";
+ bmc->version_attr.attr.owner = THIS_MODULE;
+ bmc->version_attr.attr.mode = S_IRUGO;
+ bmc->version_attr.show = ipmi_version_show;
+
+ bmc->add_dev_support_attr.attr.name = "additional_device_support";
+ bmc->add_dev_support_attr.attr.owner = THIS_MODULE;
+ bmc->add_dev_support_attr.attr.mode = S_IRUGO;
+ bmc->add_dev_support_attr.show = add_dev_support_show;
+
+ bmc->manufacturer_id_attr.attr.name = "manufacturer_id";
+ bmc->manufacturer_id_attr.attr.owner = THIS_MODULE;
+ bmc->manufacturer_id_attr.attr.mode = S_IRUGO;
+ bmc->manufacturer_id_attr.show = manufacturer_id_show;
+
+ bmc->product_id_attr.attr.name = "product_id";
+ bmc->product_id_attr.attr.owner = THIS_MODULE;
+ bmc->product_id_attr.attr.mode = S_IRUGO;
+ bmc->product_id_attr.show = product_id_show;
+
+ bmc->guid_attr.attr.name = "guid";
+ bmc->guid_attr.attr.owner = THIS_MODULE;
+ bmc->guid_attr.attr.mode = S_IRUGO;
+ bmc->guid_attr.show = guid_show;
+
+ bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision";
+ bmc->aux_firmware_rev_attr.attr.owner = THIS_MODULE;
+ bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO;
+ bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show;
+
err = device_create_file(&bmc->dev->dev,
&bmc->device_id_attr);
if (err) goto out;
@@ -2106,9 +2160,39 @@
bmc->id.product_id,
bmc->id.device_id);
} else {
- bmc->dev = platform_device_alloc("ipmi_bmc",
- bmc->id.device_id);
+ char name[14];
+ unsigned char orig_dev_id = bmc->id.device_id;
+ int warn_printed = 0;
+
+ snprintf(name, sizeof(name),
+ "ipmi_bmc.%4.4x", bmc->id.product_id);
+
+ while (ipmi_find_bmc_prod_dev_id(&ipmidriver,
+ bmc->id.product_id,
+ bmc->id.device_id))
+ {
+ if (!warn_printed) {
+ printk(KERN_WARNING PFX
+ "This machine has two different BMCs"
+ " with the same product id and device"
+ " id. This is an error in the"
+ " firmware, but incrementing the"
+ " device id to work around the problem."
+ " Prod ID = 0x%x, Dev ID = 0x%x\n",
+ bmc->id.product_id, bmc->id.device_id);
+ warn_printed = 1;
+ }
+ bmc->id.device_id++; /* Wraps at 255 */
+ if (bmc->id.device_id == orig_dev_id) {
+ printk(KERN_ERR PFX
+ "Out of device ids!\n");
+ break;
+ }
+ }
+
+ bmc->dev = platform_device_alloc(name, bmc->id.device_id);
if (!bmc->dev) {
+ mutex_unlock(&ipmidriver_mutex);
printk(KERN_ERR
"ipmi_msghandler:"
" Unable to allocate platform device\n");
@@ -2121,6 +2205,8 @@
rv = platform_device_add(bmc->dev);
mutex_unlock(&ipmidriver_mutex);
if (rv) {
+ platform_device_put(bmc->dev);
+ bmc->dev = NULL;
printk(KERN_ERR
"ipmi_msghandler:"
" Unable to register bmc device: %d\n",
@@ -2130,57 +2216,6 @@
return rv;
}
- bmc->device_id_attr.attr.name = "device_id";
- bmc->device_id_attr.attr.owner = THIS_MODULE;
- bmc->device_id_attr.attr.mode = S_IRUGO;
- bmc->device_id_attr.show = device_id_show;
-
- bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs";
- bmc->provides_dev_sdrs_attr.attr.owner = THIS_MODULE;
- bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO;
- bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show;
-
- bmc->revision_attr.attr.name = "revision";
- bmc->revision_attr.attr.owner = THIS_MODULE;
- bmc->revision_attr.attr.mode = S_IRUGO;
- bmc->revision_attr.show = revision_show;
-
- bmc->firmware_rev_attr.attr.name = "firmware_revision";
- bmc->firmware_rev_attr.attr.owner = THIS_MODULE;
- bmc->firmware_rev_attr.attr.mode = S_IRUGO;
- bmc->firmware_rev_attr.show = firmware_rev_show;
-
- bmc->version_attr.attr.name = "ipmi_version";
- bmc->version_attr.attr.owner = THIS_MODULE;
- bmc->version_attr.attr.mode = S_IRUGO;
- bmc->version_attr.show = ipmi_version_show;
-
- bmc->add_dev_support_attr.attr.name
- = "additional_device_support";
- bmc->add_dev_support_attr.attr.owner = THIS_MODULE;
- bmc->add_dev_support_attr.attr.mode = S_IRUGO;
- bmc->add_dev_support_attr.show = add_dev_support_show;
-
- bmc->manufacturer_id_attr.attr.name = "manufacturer_id";
- bmc->manufacturer_id_attr.attr.owner = THIS_MODULE;
- bmc->manufacturer_id_attr.attr.mode = S_IRUGO;
- bmc->manufacturer_id_attr.show = manufacturer_id_show;
-
- bmc->product_id_attr.attr.name = "product_id";
- bmc->product_id_attr.attr.owner = THIS_MODULE;
- bmc->product_id_attr.attr.mode = S_IRUGO;
- bmc->product_id_attr.show = product_id_show;
-
- bmc->guid_attr.attr.name = "guid";
- bmc->guid_attr.attr.owner = THIS_MODULE;
- bmc->guid_attr.attr.mode = S_IRUGO;
- bmc->guid_attr.show = guid_show;
-
- bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision";
- bmc->aux_firmware_rev_attr.attr.owner = THIS_MODULE;
- bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO;
- bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show;
-
rv = create_files(bmc);
if (rv) {
mutex_lock(&ipmidriver_mutex);