[PATCH 1/1] PCI: change procfs interface to use unlocked_ioctl insteadof ioctl

[Sergio Luis]

Change drivers/pci/proc.c to use the unlocked_ioctl handler instead of
the ioctl one.

Signed-off-by: Sergio Luis <sergio@xxxxxxx>

proc.c |   10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)


diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
index 716439e..8ac5880 100644
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@@ -12,6 +12,7 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/capability.h>
+#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>
#include "pci.h"
@@ -202,15 +203,17 @@ struct pci_filp_private {
    int write_combine;
};

-static int proc_bus_pci_ioctl(struct inode *inode, struct file *file, 
unsigned int cmd, unsigned long arg)
+static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd, 
unsigned long arg)
{
+    struct inode *inode = file->f_path.dentry->d_inode;
    const struct proc_dir_entry *dp = PDE(inode);
    struct pci_dev *dev = dp->data;
#ifdef HAVE_PCI_MMAP
    struct pci_filp_private *fpriv = file->private_data;
#endif /* HAVE_PCI_MMAP */
-    int ret = 0;
+    long ret = 0;

+    lock_kernel();
    switch (cmd) {
    case PCIIOC_CONTROLLER:
        ret = pci_domain_nr(dev->bus);
@@ -239,6 +242,7 @@ static int proc_bus_pci_ioctl(struct inode *inode, 
struct file *file, unsigned i
        break;
    };

+    unlock_kernel();
    return ret;
}

@@ -291,7 +295,7 @@ static const struct file_operations 
proc_bus_pci_operations = {
    .llseek        = proc_bus_pci_lseek,
    .read        = proc_bus_pci_read,
    .write        = proc_bus_pci_write,
-    .ioctl        = proc_bus_pci_ioctl,
+    .unlocked_ioctl    = proc_bus_pci_ioctl,
#ifdef HAVE_PCI_MMAP
    .open        = proc_bus_pci_open,
    .release    = proc_bus_pci_release,


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