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SubjectRe: [PATCH] USB and Driver Core patches for 2.6.10
Date
From
ChangeSet 1.1938.444.7, 2004/12/16 13:19:24-08:00, greg@kroah.com

USB: convert uhci-hcd driver to use debugfs.

Look, we saved 24 lines of code...

Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>


drivers/usb/host/uhci-debug.c | 36 +++++++++++--------------
drivers/usb/host/uhci-hcd.c | 60 ++++++++++++++----------------------------
drivers/usb/host/uhci-hcd.h | 6 +---
3 files changed, 39 insertions(+), 63 deletions(-)

diff -Nru a/drivers/usb/host/uhci-debug.c b/drivers/usb/host/uhci-debug.c
--- a/drivers/usb/host/uhci-debug.c 2005-01-07 15:47:27 -08:00
+++ b/drivers/usb/host/uhci-debug.c 2005-01-07 15:47:27 -08:00
@@ -11,7 +11,7 @@

#include <linux/config.h>
#include <linux/kernel.h>
-#include <linux/proc_fs.h>
+#include <linux/debugfs.h>
#include <linux/smp_lock.h>
#include <asm/io.h>

@@ -496,19 +496,18 @@

#define MAX_OUTPUT (64 * 1024)

-static struct proc_dir_entry *uhci_proc_root = NULL;
+static struct dentry *uhci_debugfs_root = NULL;

-struct uhci_proc {
+struct uhci_debug {
int size;
char *data;
struct uhci_hcd *uhci;
};

-static int uhci_proc_open(struct inode *inode, struct file *file)
+static int uhci_debug_open(struct inode *inode, struct file *file)
{
- const struct proc_dir_entry *dp = PDE(inode);
- struct uhci_hcd *uhci = dp->data;
- struct uhci_proc *up;
+ struct uhci_hcd *uhci = inode->u.generic_ip;
+ struct uhci_debug *up;
int ret = -ENOMEM;

lock_kernel();
@@ -532,9 +531,9 @@
return ret;
}

-static loff_t uhci_proc_lseek(struct file *file, loff_t off, int whence)
+static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
{
- struct uhci_proc *up;
+ struct uhci_debug *up;
loff_t new = -1;

lock_kernel();
@@ -556,16 +555,16 @@
return (file->f_pos = new);
}

-static ssize_t uhci_proc_read(struct file *file, char __user *buf,
+static ssize_t uhci_debug_read(struct file *file, char __user *buf,
size_t nbytes, loff_t *ppos)
{
- struct uhci_proc *up = file->private_data;
+ struct uhci_debug *up = file->private_data;
return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
}

-static int uhci_proc_release(struct inode *inode, struct file *file)
+static int uhci_debug_release(struct inode *inode, struct file *file)
{
- struct uhci_proc *up = file->private_data;
+ struct uhci_debug *up = file->private_data;

kfree(up->data);
kfree(up);
@@ -573,11 +572,10 @@
return 0;
}

-static struct file_operations uhci_proc_operations = {
- .open = uhci_proc_open,
- .llseek = uhci_proc_lseek,
- .read = uhci_proc_read,
-// write: uhci_proc_write,
- .release = uhci_proc_release,
+static struct file_operations uhci_debug_operations = {
+ .open = uhci_debug_open,
+ .llseek = uhci_debug_lseek,
+ .read = uhci_debug_read,
+ .release = uhci_debug_release,
};
#endif
diff -Nru a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
--- a/drivers/usb/host/uhci-hcd.c 2005-01-07 15:47:27 -08:00
+++ b/drivers/usb/host/uhci-hcd.c 2005-01-07 15:47:27 -08:00
@@ -46,7 +46,7 @@
#include <linux/unistd.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
-#include <linux/proc_fs.h>
+#include <linux/debugfs.h>
#include <linux/pm.h>
#include <linux/dmapool.h>
#include <linux/dma-mapping.h>
@@ -74,7 +74,7 @@
* debug = 0, no debugging messages
* debug = 1, dump failed URB's except for stalls
* debug = 2, dump all failed URB's (including stalls)
- * show all queues in /proc/driver/uhci/[pci_addr]
+ * show all queues in /debug/uhci/[pci_addr]
* debug = 3, show all TD's in URB's when dumping
*/
#ifdef DEBUG
@@ -1927,12 +1927,10 @@
uhci->fl = NULL;
}

-#ifdef CONFIG_PROC_FS
- if (uhci->proc_entry) {
- remove_proc_entry(uhci->hcd.self.bus_name, uhci_proc_root);
- uhci->proc_entry = NULL;
+ if (uhci->dentry) {
+ debugfs_remove(uhci->dentry);
+ uhci->dentry = NULL;
}
-#endif
}

static int uhci_reset(struct usb_hcd *hcd)
@@ -1972,25 +1970,17 @@
unsigned io_size;
dma_addr_t dma_handle;
struct usb_device *udev;
-#ifdef CONFIG_PROC_FS
- struct proc_dir_entry *ent;
-#endif
+ struct dentry *dentry;

io_size = pci_resource_len(to_pci_dev(uhci_dev(uhci)), hcd->region);

-#ifdef CONFIG_PROC_FS
- ent = create_proc_entry(hcd->self.bus_name, S_IFREG|S_IRUGO|S_IWUSR, uhci_proc_root);
- if (!ent) {
- dev_err(uhci_dev(uhci), "couldn't create uhci proc entry\n");
+ dentry = debugfs_create_file(hcd->self.bus_name, S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root, uhci, &uhci_debug_operations);
+ if (!dentry) {
+ dev_err(uhci_dev(uhci), "couldn't create uhci debugfs entry\n");
retval = -ENOMEM;
- goto err_create_proc_entry;
+ goto err_create_debug_entry;
}
-
- ent->data = uhci;
- ent->proc_fops = &uhci_proc_operations;
- ent->size = 0;
- uhci->proc_entry = ent;
-#endif
+ uhci->dentry = dentry;

uhci->fsbr = 0;
uhci->fsbrtimeout = 0;
@@ -2192,13 +2182,10 @@
uhci->fl = NULL;

err_alloc_fl:
-#ifdef CONFIG_PROC_FS
- remove_proc_entry(hcd->self.bus_name, uhci_proc_root);
- uhci->proc_entry = NULL;
-
-err_create_proc_entry:
-#endif
+ debugfs_remove(uhci->dentry);
+ uhci->dentry = NULL;

+err_create_debug_entry:
return retval;
}

@@ -2405,11 +2392,9 @@
goto errbuf_failed;
}

-#ifdef CONFIG_PROC_FS
- uhci_proc_root = create_proc_entry("driver/uhci", S_IFDIR, NULL);
- if (!uhci_proc_root)
- goto proc_failed;
-#endif
+ uhci_debugfs_root = debugfs_create_dir("uhci", NULL);
+ if (!uhci_debugfs_root)
+ goto debug_failed;

uhci_up_cachep = kmem_cache_create("uhci_urb_priv",
sizeof(struct urb_priv), 0, 0, NULL, NULL);
@@ -2427,12 +2412,9 @@
warn("not all urb_priv's were freed!");

up_failed:
+ debugfs_remove(uhci_debugfs_root);

-#ifdef CONFIG_PROC_FS
- remove_proc_entry("driver/uhci", NULL);
-
-proc_failed:
-#endif
+debug_failed:
if (errbuf)
kfree(errbuf);

@@ -2448,9 +2430,7 @@
if (kmem_cache_destroy(uhci_up_cachep))
warn("not all urb_priv's were freed!");

-#ifdef CONFIG_PROC_FS
- remove_proc_entry("driver/uhci", NULL);
-#endif
+ debugfs_remove(uhci_debugfs_root);

if (errbuf)
kfree(errbuf);
diff -Nru a/drivers/usb/host/uhci-hcd.h b/drivers/usb/host/uhci-hcd.h
--- a/drivers/usb/host/uhci-hcd.h 2005-01-07 15:47:27 -08:00
+++ b/drivers/usb/host/uhci-hcd.h 2005-01-07 15:47:27 -08:00
@@ -326,10 +326,8 @@
struct uhci_hcd {
struct usb_hcd hcd; /* must come first! */

-#ifdef CONFIG_PROC_FS
- /* procfs */
- struct proc_dir_entry *proc_entry;
-#endif
+ /* debugfs */
+ struct dentry *dentry;

/* Grabbed from PCI */
unsigned long io_addr;
-
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