From 00b81fb23a4937a24cb010f41ac173a786eb4c55 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Tue, 1 Jun 2010 23:04:43 +0200 Subject: [PATCH] USB-BKL: Remove BKL use in uhci-debug BKL was not really needed, just came from earlier push downs. The only part that's a bit dodgy is the lseek function. Would need another lock or atomic access to fpos on 32bit? Better to have a libfs lseek Signed-off-by: Andi Kleen Cc: Arnd Bergmann Cc: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/uhci-debug.c | 20 +++++++------------- 1 file changed, 7 insertions(+), 13 deletions(-) diff --git a/drivers/usb/host/uhci-debug.c b/drivers/usb/host/uhci-debug.c index 98cf0b26b968..c168999722d1 100644 --- a/drivers/usb/host/uhci-debug.c +++ b/drivers/usb/host/uhci-debug.c @@ -495,18 +495,16 @@ static int uhci_debug_open(struct inode *inode, struct file *file) { struct uhci_hcd *uhci = inode->i_private; struct uhci_debug *up; - int ret = -ENOMEM; unsigned long flags; - lock_kernel(); up = kmalloc(sizeof(*up), GFP_KERNEL); if (!up) - goto out; + return -ENOMEM; up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL); if (!up->data) { kfree(up); - goto out; + return -ENOMEM; } up->size = 0; @@ -517,10 +515,7 @@ static int uhci_debug_open(struct inode *inode, struct file *file) file->private_data = up; - ret = 0; -out: - unlock_kernel(); - return ret; + return 0; } static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence) @@ -528,9 +523,9 @@ static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence) struct uhci_debug *up; loff_t new = -1; - lock_kernel(); up = file->private_data; + /* XXX: atomic 64bit seek access, but that needs to be fixed in the VFS */ switch (whence) { case 0: new = off; @@ -539,11 +534,10 @@ static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence) new = file->f_pos + off; break; } - if (new < 0 || new > up->size) { - unlock_kernel(); + + if (new < 0 || new > up->size) return -EINVAL; - } - unlock_kernel(); + return (file->f_pos = new); } -- GitLab