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>

1 files changed, 57 insertions, 36 deletions

diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c
index 4a933d413423..933a7dd8f86c 100644
--- 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,
 };