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authorTakashi Iwai <tiwai@suse.de>2015-02-04 15:36:14 +0100
committerCorey Minyard <cminyard@mvista.com>2015-02-19 20:58:40 -0600
commit2d06a0c9b3756404e141cafcd62b29ce05238007 (patch)
treecd9e8476ce380098f8799b4c958f630f4f1c4186 /drivers/char
parentbdf2829cb673afc3aeb4f04531546c7605e8d94e (diff)
downloadlinux-2d06a0c9b3756404e141cafcd62b29ce05238007.tar.bz2
ipmi: Use is_visible callback for conditional sysfs entries
Instead of manual calls of device_create_file() and device_remove_file(), implement the condition in is_visible callback for the attribute group and put these entries to the group, too. This simplifies the code and avoids the possible races. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Corey Minyard <cminyard@mvista.com>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/ipmi/ipmi_msghandler.c60
1 files changed, 17 insertions, 43 deletions
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index 4891c39b3259..d5a2bd7230b2 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -2366,11 +2366,28 @@ static struct attribute *bmc_dev_attrs[] = {
&dev_attr_additional_device_support.attr,
&dev_attr_manufacturer_id.attr,
&dev_attr_product_id.attr,
+ &dev_attr_aux_firmware_revision.attr,
+ &dev_attr_guid.attr,
NULL
};
+static umode_t bmc_dev_attr_is_visible(struct kobject *kobj,
+ struct attribute *attr, int idx)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ struct bmc_device *bmc = to_bmc_device(dev);
+ umode_t mode = attr->mode;
+
+ if (attr == &dev_attr_aux_firmware_revision.attr)
+ return bmc->id.aux_firmware_revision_set ? mode : 0;
+ if (attr == &dev_attr_guid.attr)
+ return bmc->guid_set ? mode : 0;
+ return mode;
+}
+
static struct attribute_group bmc_dev_attr_group = {
.attrs = bmc_dev_attrs,
+ .is_visible = bmc_dev_attr_is_visible,
};
static const struct attribute_group *bmc_dev_attr_groups[] = {
@@ -2393,13 +2410,6 @@ cleanup_bmc_device(struct kref *ref)
{
struct bmc_device *bmc = container_of(ref, struct bmc_device, usecount);
- if (bmc->id.aux_firmware_revision_set)
- device_remove_file(&bmc->pdev.dev,
- &dev_attr_aux_firmware_revision);
- if (bmc->guid_set)
- device_remove_file(&bmc->pdev.dev,
- &dev_attr_guid);
-
platform_device_unregister(&bmc->pdev);
}
@@ -2420,33 +2430,6 @@ static void ipmi_bmc_unregister(ipmi_smi_t intf)
mutex_unlock(&ipmidriver_mutex);
}
-static int create_bmc_files(struct bmc_device *bmc)
-{
- int err;
-
- if (bmc->id.aux_firmware_revision_set) {
- err = device_create_file(&bmc->pdev.dev,
- &dev_attr_aux_firmware_revision);
- if (err)
- goto out;
- }
- if (bmc->guid_set) {
- err = device_create_file(&bmc->pdev.dev,
- &dev_attr_guid);
- if (err)
- goto out_aux_firm;
- }
-
- return 0;
-
-out_aux_firm:
- if (bmc->id.aux_firmware_revision_set)
- device_remove_file(&bmc->pdev.dev,
- &dev_attr_aux_firmware_revision);
-out:
- return err;
-}
-
static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum)
{
int rv;
@@ -2535,15 +2518,6 @@ static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum)
return rv;
}
- rv = create_bmc_files(bmc);
- if (rv) {
- mutex_lock(&ipmidriver_mutex);
- platform_device_unregister(&bmc->pdev);
- mutex_unlock(&ipmidriver_mutex);
-
- return rv;
- }
-
dev_info(intf->si_dev, "Found new BMC (man_id: 0x%6.6x, "
"prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
bmc->id.manufacturer_id,