pcmcia: switch cm4000_cs.c to unlocked_ioctl

Push the BKL down and use unlocked_ioctl.

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Harald Welte <laforge@gnumonks.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c
index 4a933d4..933a7dd 100644 (file)
--- a/drivers/char/pcmcia/cm4000_cs.c
+++ b/drivers/char/pcmcia/cm4000_cs.c
@@ -32,8 +32,9 @@
 #include <linux/fs.h>
 #include <linux/delay.h>
 #include <linux/bitrev.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/smp_lock.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
 
 #include <pcmcia/cs_types.h>
 #include <pcmcia/cs.h>
@@ -1405,11 +1406,11 @@ static void stop_monitor(struct cm4000_dev *dev)
        DEBUGP(3, dev, "<- stop_monitor\n");
 }
 
-static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
-                    unsigned long arg)
+static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
        struct cm4000_dev *dev = filp->private_data;
        unsigned int iobase = dev->p_dev->io.BasePort1;
+       struct inode *inode = filp->f_path.dentry->d_inode;
        struct pcmcia_device *link;
        int size;
        int rc;
@@ -1426,38 +1427,42 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
        DEBUGP(3, dev, "cmm_ioctl(device=%d.%d) %s\n", imajor(inode),
               iminor(inode), ioctl_names[_IOC_NR(cmd)]);
 
+       lock_kernel();
+       rc = -ENODEV;
        link = dev_table[iminor(inode)];
        if (!pcmcia_dev_present(link)) {
                DEBUGP(4, dev, "DEV_OK false\n");
-               return -ENODEV;
+               goto out;
        }
 
        if (test_bit(IS_CMM_ABSENT, &dev->flags)) {
                DEBUGP(4, dev, "CMM_ABSENT flag set\n");
-               return -ENODEV;
+               goto out;
        }
+       rc = EINVAL;
 
        if (_IOC_TYPE(cmd) != CM_IOC_MAGIC) {
                DEBUGP(4, dev, "ioctype mismatch\n");
-               return -EINVAL;
+               goto out;
        }
        if (_IOC_NR(cmd) > CM_IOC_MAXNR) {
                DEBUGP(4, dev, "iocnr mismatch\n");
-               return -EINVAL;
+               goto out;
        }
        size = _IOC_SIZE(cmd);
-       rc = 0;
+       rc = -EFAULT;
        DEBUGP(4, dev, "iocdir=%.4x iocr=%.4x iocw=%.4x iocsize=%d cmd=%.4x\n",
              _IOC_DIR(cmd), _IOC_READ, _IOC_WRITE, size, cmd);
 
        if (_IOC_DIR(cmd) & _IOC_READ) {
                if (!access_ok(VERIFY_WRITE, argp, size))
-                       return -EFAULT;
+                       goto out;
        }
        if (_IOC_DIR(cmd) & _IOC_WRITE) {
                if (!access_ok(VERIFY_READ, argp, size))
-                       return -EFAULT;
+                       goto out;
        }
+       rc = 0;
 
        switch (cmd) {
        case CM_IOCGSTATUS:
@@ -1477,9 +1482,9 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
                        if (test_bit(IS_BAD_CARD, &dev->flags))
                                status |= CM_BAD_CARD;
                        if (copy_to_user(argp, &status, sizeof(int)))
-                               return -EFAULT;
+                               rc = -EFAULT;
                }
-               return 0;
+               break;
        case CM_IOCGATR:
                DEBUGP(4, dev, "... in CM_IOCGATR\n");
                {
@@ -1492,25 +1497,29 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
                              || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
                                  != 0)))) {
                                if (filp->f_flags & O_NONBLOCK)
-                                       return -EAGAIN;
-                               return -ERESTARTSYS;
+                                       rc = -EAGAIN;
+                               else
+                                       rc = -ERESTARTSYS;
+                               break;
                        }
 
+                       rc = -EFAULT;
                        if (test_bit(IS_ATR_VALID, &dev->flags) == 0) {
                                tmp = -1;
                                if (copy_to_user(&(atreq->atr_len), &tmp,
                                                 sizeof(int)))
-                                       return -EFAULT;
+                                       break;
                        } else {
                                if (copy_to_user(atreq->atr, dev->atr,
                                                 dev->atr_len))
-                                       return -EFAULT;
+                                       break;
 
                                tmp = dev->atr_len;
                                if (copy_to_user(&(atreq->atr_len), &tmp, sizeof(int)))
-                                       return -EFAULT;
+                                       break;
                        }
-                       return 0;
+                       rc = 0;
+                       break;
                }
        case CM_IOCARDOFF:
 
@@ -1538,8 +1547,10 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
                              || (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
                                  == 0)))) {
                                if (filp->f_flags & O_NONBLOCK)
-                                       return -EAGAIN;
-                               return -ERESTARTSYS;
+                                       rc = -EAGAIN;
+                               else
+                                       rc = -ERESTARTSYS;
+                               break;
                        }
                        /* Set Flags0 = 0x42 */
                        DEBUGP(4, dev, "Set Flags0=0x42 \n");
@@ -1554,8 +1565,10 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
                              || (test_bit(IS_ATR_VALID, (void *)&dev->flags) !=
                                  0)))) {
                                if (filp->f_flags & O_NONBLOCK)
-                                       return -EAGAIN;
-                               return -ERESTARTSYS;
+                                       rc = -EAGAIN;
+                               else
+                                       rc = -ERESTARTSYS;
+                               break;
                        }
                }
                /* release lock */
@@ -1568,8 +1581,10 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
                        struct ptsreq krnptsreq;
 
                        if (copy_from_user(&krnptsreq, argp,
-                                          sizeof(struct ptsreq)))
-                               return -EFAULT;
+                                          sizeof(struct ptsreq))) {
+                               rc = -EFAULT;
+                               break;
+                       }
 
                        rc = 0;
                        DEBUGP(4, dev, "... in CM_IOCSPTS\n");
@@ -1580,8 +1595,10 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
                              || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
                                  != 0)))) {
                                if (filp->f_flags & O_NONBLOCK)
-                                       return -EAGAIN;
-                               return -ERESTARTSYS;
+                                       rc = -EAGAIN;
+                               else
+                                       rc = -ERESTARTSYS;
+                               break;
                        }
                        /* get IO lock */
                        if (wait_event_interruptible
@@ -1590,8 +1607,10 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
                              || (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
                                  == 0)))) {
                                if (filp->f_flags & O_NONBLOCK)
-                                       return -EAGAIN;
-                               return -ERESTARTSYS;
+                                       rc = -EAGAIN;
+                               else
+                                       rc = -ERESTARTSYS;
+                               break;
                        }
 
                        if ((rc = set_protocol(dev, &krnptsreq)) != 0) {
@@ -1604,7 +1623,7 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
                        wake_up_interruptible(&dev->ioq);
 
                }
-               return rc;
+               break;
 #ifdef PCMCIA_DEBUG
        case CM_IOSDBGLVL:      /* set debug log level */
                {
@@ -1612,18 +1631,20 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 
                        old_pc_debug = pc_debug;
                        if (copy_from_user(&pc_debug, argp, sizeof(int)))
-                               return -EFAULT;
-
-                       if (old_pc_debug != pc_debug)
+                               rc = -EFAULT;
+                       else if (old_pc_debug != pc_debug)
                                DEBUGP(0, dev, "Changed debug log level "
                                       "to %i\n", pc_debug);
                }
-               return rc;
+               break;
 #endif
        default:
                DEBUGP(4, dev, "... in default (unknown IOCTL code)\n");
-               return -EINVAL;
+               rc = -ENOTTY;
        }
+out:
+       unlock_kernel();
+       return rc;
 }
 
 static int cmm_open(struct inode *inode, struct file *filp)
@@ -1897,7 +1918,7 @@ static const struct file_operations cm4000_fops = {
        .owner  = THIS_MODULE,
        .read   = cmm_read,
        .write  = cmm_write,
-       .ioctl  = cmm_ioctl,
+       .unlocked_ioctl = cmm_ioctl,
        .open   = cmm_open,
        .release= cmm_close,
 };