tree 433c4c4d75ebbf2b2671c7368afdb0fed8163a10
parent 1ad434d7cf5f490c71cfbbb2fb91076c01c8704e
author Russell King <[EMAIL PROTECTED]> Fri, 19 Aug 2005 09:42:52 +0100
committer Russell King <[EMAIL PROTECTED]> Fri, 19 Aug 2005 09:42:52 +0100
[MMC] Use an IDR for host name indicies
Signed-off-by: Russell King <[EMAIL PROTECTED]>
drivers/mmc/mmc_sysfs.c | 21 +++++++++++++++++++--
include/linux/mmc/host.h | 1 +
2 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/mmc_sysfs.c b/drivers/mmc/mmc_sysfs.c
--- a/drivers/mmc/mmc_sysfs.c
+++ b/drivers/mmc/mmc_sysfs.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
+#include <linux/idr.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
@@ -236,6 +237,9 @@ static struct class mmc_host_class = {
.release = mmc_host_classdev_release,
};
+static DEFINE_IDR(mmc_host_idr);
+static DEFINE_SPINLOCK(mmc_host_lock);
+
/*
* Internal function. Allocate a new MMC host.
*/
@@ -261,10 +265,19 @@ struct mmc_host *mmc_alloc_host_sysfs(in
*/
int mmc_add_host_sysfs(struct mmc_host *host)
{
- static unsigned int host_num;
+ int err;
+
+ if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
+ return -ENOMEM;
+
+ spin_lock(&mmc_host_lock);
+ err = idr_get_new(&mmc_host_idr, host, &host->index);
+ spin_unlock(&mmc_host_lock);
+ if (err)
+ return err;
snprintf(host->class_dev.class_id, BUS_ID_SIZE,
- "mmc%d", host_num++);
+ "mmc%d", host->index);
return class_device_add(&host->class_dev);
}
@@ -275,6 +288,10 @@ int mmc_add_host_sysfs(struct mmc_host *
void mmc_remove_host_sysfs(struct mmc_host *host)
{
class_device_del(&host->class_dev);
+
+ spin_lock(&mmc_host_lock);
+ idr_remove(&mmc_host_idr, host->index);
+ spin_unlock(&mmc_host_lock);
}
/*
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -64,6 +64,7 @@ struct device;
struct mmc_host {
struct device *dev;
struct class_device class_dev;
+ int index;
struct mmc_host_ops *ops;
unsigned int f_min;
unsigned int f_max;
-
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