cris: cdev lock_kernel() pushdown

[linux-2.6-omap-h63xx.git] / arch / cris / arch-v32 / drivers / sync_serial.c

diff --git a/arch/cris/arch-v32/drivers/sync_serial.c b/arch/cris/arch-v32/drivers/sync_serial.c
index 47c377df6fb361e7342d2e8a537c463b3bbd8962..d2a0fbf5341fc1870e8bf9d245acb980d3f95f6c 100644 (file)
--- 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)