cris: cdev lock_kernel() pushdown

Push the cdev lock_kernel() call into cris drivers.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>

5 files changed, 52 insertions, 27 deletions

diff --git a/arch/cris/arch-v10/drivers/gpio.c b/arch/cris/arch-v10/drivers/gpio.c
index 68a998bd1069..86048e697eb5 100644
--- a/arch/cris/arch-v10/drivers/gpio.c
+++ b/arch/cris/arch-v10/drivers/gpio.c
@@ -16,6 +16,7 @@
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/fs.h>
+#include <linux/smp_lock.h>
 #include <linux/string.h>
 #include <linux/poll.h>
 #include <linux/init.h>
@@ -323,6 +324,7 @@ gpio_open(struct inode *inode, struct file *filp)
         if (!priv)
                 return -ENOMEM;
 
+        lock_kernel();
         priv->minor = p;
 
         /* initialize the io/alarm struct */
@@ -357,6 +359,7 @@ gpio_open(struct inode *inode, struct file *filp)
         alarmlist = priv;
         spin_unlock_irqrestore(&gpio_lock, flags);
 
+        unlock_kernel();
         return 0;
 }
 
diff --git a/arch/cris/arch-v10/drivers/sync_serial.c b/arch/cris/arch-v10/drivers/sync_serial.c
index 069546e342c5..91fea623c7c9 100644
--- a/arch/cris/arch-v10/drivers/sync_serial.c
+++ b/arch/cris/arch-v10/drivers/sync_serial.c
@@ -21,6 +21,7 @@
 #include <linux/interrupt.h>
 #include <linux/poll.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 #include <linux/timer.h>
 #include <asm/irq.h>
 #include <asm/dma.h>
@@ -443,18 +444,21 @@ static int sync_serial_open(struct inode *inode, struct file *file)
         int dev = MINOR(inode->i_rdev);
         struct sync_port *port;
         int mode;
+        int err = -EBUSY;
 
+        lock_kernel();
         DEBUG(printk(KERN_DEBUG "Open sync serial port %d\n", dev));
 
         if (dev < 0 || dev >= NUMBER_OF_PORTS || !ports[dev].enabled) {
                 DEBUG(printk(KERN_DEBUG "Invalid minor %d\n", dev));
-                return -ENODEV;
+                err = -ENODEV;
+                goto out;
         }
         port = &ports[dev];
         /* Allow open this device twice (assuming one reader and one writer) */
         if (port->busy == 2) {
                 DEBUG(printk(KERN_DEBUG "Device is busy.. \n"));
-                return -EBUSY;
+                goto out;
         }
         if (port->init_irqs) {
                 if (port->use_dma) {
@@ -465,14 +469,14 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                                 &ports[0])) {
                                         printk(KERN_CRIT "Can't alloc "
                                                 "sync serial port 1 IRQ");
-                                        return -EBUSY;
+                                        goto out;
                                 } else if (request_irq(25, rx_interrupt, 0,
                                                 "synchronous serial 1 dma rx",
                                                 &ports[0])) {
                                         free_irq(24, &port[0]);
                                         printk(KERN_CRIT "Can't alloc "
                                                 "sync serial port 1 IRQ");
-                                        return -EBUSY;
+                                        goto out;
                                 } else if (cris_request_dma(8,
                                                 "synchronous serial 1 dma tr",
                                                 DMA_VERBOSE_ON_ERROR,
@@ -482,7 +486,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                         printk(KERN_CRIT "Can't alloc "
                                                 "sync serial port 1 "
                                                 "TX DMA channel");
-                                        return -EBUSY;
+                                        goto out;
                                 } else if (cris_request_dma(9,
                                                 "synchronous serial 1 dma rec",
                                                 DMA_VERBOSE_ON_ERROR,
@@ -493,7 +497,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                         printk(KERN_CRIT "Can't alloc "
                                                 "sync serial port 1 "
                                                 "RX DMA channel");
-                                        return -EBUSY;
+                                        goto out;
                                 }
 #endif
                                 RESET_DMA(8); WAIT_DMA(8);
@@ -520,14 +524,14 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                                 &ports[1])) {
                                         printk(KERN_CRIT "Can't alloc "
                                                 "sync serial port 3 IRQ");
-                                        return -EBUSY;
+                                        goto out;
                                 } else if (request_irq(21, rx_interrupt, 0,
                                                 "synchronous serial 3 dma rx",
                                                 &ports[1])) {
                                         free_irq(20, &ports[1]);
                                         printk(KERN_CRIT "Can't alloc "
                                                 "sync serial port 3 IRQ");
-                                        return -EBUSY;
+                                        goto out;
                                 } else if (cris_request_dma(4,
                                                 "synchronous serial 3 dma tr",
                                                 DMA_VERBOSE_ON_ERROR,
@@ -537,7 +541,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                         printk(KERN_CRIT "Can't alloc "
                                                 "sync serial port 3 "
                                                 "TX DMA channel");
-                                        return -EBUSY;
+                                        goto out;
                                 } else if (cris_request_dma(5,
                                                 "synchronous serial 3 dma rec",
                                                 DMA_VERBOSE_ON_ERROR,
@@ -548,7 +552,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                         printk(KERN_CRIT "Can't alloc "
                                                 "sync serial port 3 "
                                                 "RX DMA channel");
-                                        return -EBUSY;
+                                        goto out;
                                 }
 #endif
                                 RESET_DMA(4); WAIT_DMA(4);
@@ -581,7 +585,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                                 &ports[0])) {
                                         printk(KERN_CRIT "Can't alloc "
                                                 "sync serial manual irq");
-                                        return -EBUSY;
+                                        goto out;
                                 }
                         } else if (port == &ports[1]) {
                                 if (request_irq(8,
@@ -591,7 +595,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                                 &ports[1])) {
                                         printk(KERN_CRIT "Can't alloc "
                                                 "sync serial manual irq");
-                                        return -EBUSY;
+                                        goto out;
                                 }
                         }
                         port->init_irqs = 0;
@@ -620,7 +624,11 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                         *R_IRQ_MASK1_SET = 1 << port->data_avail_bit;
                 DEBUG(printk(KERN_DEBUG "sser%d rec started\n", dev));
         }
-        return 0;
+        ret = 0;
+        
+out:
+        unlock_kernel();
+        return ret;
 }
 
 static int sync_serial_release(struct inode *inode, struct file *file)
diff --git a/arch/cris/arch-v32/drivers/mach-a3/gpio.c b/arch/cris/arch-v32/drivers/mach-a3/gpio.c
index de107dad9f4f..ef98608e5067 100644
--- a/arch/cris/arch-v32/drivers/mach-a3/gpio.c
+++ b/arch/cris/arch-v32/drivers/mach-a3/gpio.c
@@ -23,6 +23,7 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 
 #include <asm/etraxgpio.h>
 #include <hwregs/reg_map.h>
@@ -390,6 +391,8 @@ static int gpio_open(struct inode *inode, struct file *filp)
 
         if (!priv)
                 return -ENOMEM;
+
+        lock_kernel();
         memset(priv, 0, sizeof(*priv));
 
         priv->minor = p;
@@ -412,6 +415,7 @@ static int gpio_open(struct inode *inode, struct file *filp)
                 spin_unlock_irq(&gpio_lock);
         }
 
+        unlock_kernel();
         return 0;
 }
 
diff --git a/arch/cris/arch-v32/drivers/mach-fs/gpio.c b/arch/cris/arch-v32/drivers/mach-fs/gpio.c
index 7863fd4efc2b..fe1fde893887 100644
--- a/arch/cris/arch-v32/drivers/mach-fs/gpio.c
+++ b/arch/cris/arch-v32/drivers/mach-fs/gpio.c
@@ -22,6 +22,7 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 
 #include <asm/etraxgpio.h>
 #include <hwregs/reg_map.h>
@@ -426,9 +427,10 @@ gpio_open(struct inode *inode, struct file *filp)
                 return -EINVAL;
 
         priv = kmalloc(sizeof(struct gpio_private), GFP_KERNEL);
-
         if (!priv)
                 return -ENOMEM;
+
+        lock_kernel();
         memset(priv, 0, sizeof(*priv));
 
         priv->minor = p;
@@ -449,6 +451,7 @@ gpio_open(struct inode *inode, struct file *filp)
         alarmlist = priv;
         spin_unlock_irq(&alarm_lock);
 
+        unlock_kernel();
         return 0;
 }
 
diff --git a/arch/cris/arch-v32/drivers/sync_serial.c b/arch/cris/arch-v32/drivers/sync_serial.c
index 47c377df6fb3..d2a0fbf5341f 100644
--- a/arch/cris/arch-v32/drivers/sync_serial.c
+++ b/arch/cris/arch-v32/drivers/sync_serial.c
@@ -14,6 +14,7 @@
 #include <linux/major.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/interrupt.h>
 #include <linux/poll.h>
 #include <linux/init.h>
@@ -429,23 +430,26 @@ static inline int sync_data_avail_to_end(struct sync_port *port)
 static int sync_serial_open(struct inode *inode, struct file *file)
 {
         int dev = iminor(inode);
+        int ret = -EBUSY;
         sync_port *port;
         reg_dma_rw_cfg cfg = {.en = regk_dma_yes};
         reg_dma_rw_intr_mask intr_mask = {.data = regk_dma_yes};
 
+        lock_kernel();
         DEBUG(printk(KERN_DEBUG "Open sync serial port %d\n", dev));
 
         if (dev < 0 || dev >= NBR_PORTS || !ports[dev].enabled)
         {
                 DEBUG(printk(KERN_DEBUG "Invalid minor %d\n", dev));
-                return -ENODEV;
+                ret = -ENODEV;
+                goto out;
         }
         port = &ports[dev];
         /* Allow open this device twice (assuming one reader and one writer) */
         if (port->busy == 2)
         {
                 DEBUG(printk(KERN_DEBUG "Device is busy.. \n"));
-                return -EBUSY;
+                goto out;
         }
 
 
@@ -459,7 +463,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                                 "synchronous serial 0 dma tr",
                                                 &ports[0])) {
                                         printk(KERN_CRIT "Can't allocate sync serial port 0 IRQ");
-                                        return -EBUSY;
+                                        goto out;
                                 } else if (request_irq(DMA_IN_INTR_VECT,
                                                 rx_interrupt,
                                                 0,
@@ -467,7 +471,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                                 &ports[0])) {
                                         free_irq(DMA_OUT_INTR_VECT, &port[0]);
                                         printk(KERN_CRIT "Can't allocate sync serial port 0 IRQ");
-                                        return -EBUSY;
+                                        goto out;
                                 } else if (crisv32_request_dma(OUT_DMA_NBR,
                                                 "synchronous serial 0 dma tr",
                                                 DMA_VERBOSE_ON_ERROR,
@@ -476,7 +480,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                         free_irq(DMA_OUT_INTR_VECT, &port[0]);
                                         free_irq(DMA_IN_INTR_VECT, &port[0]);
                                         printk(KERN_CRIT "Can't allocate sync serial port 0 TX DMA channel");
-                                        return -EBUSY;
+                                        goto out;
                                 } else if (crisv32_request_dma(IN_DMA_NBR,
                                                 "synchronous serial 0 dma rec",
                                                 DMA_VERBOSE_ON_ERROR,
@@ -486,7 +490,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                         free_irq(DMA_OUT_INTR_VECT, &port[0]);
                                         free_irq(DMA_IN_INTR_VECT, &port[0]);
                                         printk(KERN_CRIT "Can't allocate sync serial port 1 RX DMA channel");
-                                        return -EBUSY;
+                                        goto out;
                                 }
 #endif
                         }
@@ -499,7 +503,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                                 "synchronous serial 1 dma tr",
                                                 &ports[1])) {
                                         printk(KERN_CRIT "Can't allocate sync serial port 1 IRQ");
-                                        return -EBUSY;
+                                        goto out;
                                 } else if (request_irq(DMA7_INTR_VECT,
                                                        rx_interrupt,
                                                        0,
@@ -507,7 +511,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                                        &ports[1])) {
                                         free_irq(DMA6_INTR_VECT, &ports[1]);
                                         printk(KERN_CRIT "Can't allocate sync serial port 3 IRQ");
-                                        return -EBUSY;
+                                        goto out;
                                 } else if (crisv32_request_dma(
                                                 SYNC_SER1_TX_DMA_NBR,
                                                 "synchronous serial 1 dma tr",
@@ -517,7 +521,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                         free_irq(DMA6_INTR_VECT, &ports[1]);
                                         free_irq(DMA7_INTR_VECT, &ports[1]);
                                         printk(KERN_CRIT "Can't allocate sync serial port 3 TX DMA channel");
-                                        return -EBUSY;
+                                        goto out;
                                 } else if (crisv32_request_dma(
                                                 SYNC_SER1_RX_DMA_NBR,
                                                 "synchronous serial 3 dma rec",
@@ -528,7 +532,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                         free_irq(DMA6_INTR_VECT, &ports[1]);
                                         free_irq(DMA7_INTR_VECT, &ports[1]);
                                         printk(KERN_CRIT "Can't allocate sync serial port 3 RX DMA channel");
-                                        return -EBUSY;
+                                        goto out;
                                 }
 #endif
                         }
@@ -554,7 +558,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                                 "synchronous serial manual irq",
                                                 &ports[0])) {
                                         printk("Can't allocate sync serial manual irq");
-                                        return -EBUSY;
+                                        goto out;
                                 }
                         }
 #ifdef CONFIG_ETRAXFS
@@ -565,7 +569,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
                                                 "synchronous serial manual irq",
                                                 &ports[1])) {
                                         printk(KERN_CRIT "Can't allocate sync serial manual irq");
-                                        return -EBUSY;
+                                        goto out;
                                 }
                         }
 #endif
@@ -578,7 +582,10 @@ static int sync_serial_open(struct inode *inode, struct file *file)
         } /* port->init_irqs */
 
         port->busy++;
-        return 0;
+        ret = 0;
+out:
+        unlock_kernel();
+        return ret;
 }
 
 static int sync_serial_release(struct inode *inode, struct file *file)