drivers/char/mem.c: avoid OOM lockup during large reads from /dev/zero

[safe/jmp/linux-2.6] / drivers / video / arkfb.c

diff --git a/drivers/video/arkfb.c b/drivers/video/arkfb.c
index 8a1b07c..d583bea 100644 (file)
--- a/drivers/video/arkfb.c
+++ b/drivers/video/arkfb.c
@@ -11,7 +11,6 @@
  *  Code is based on s3fb
  */
 
-#include <linux/version.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
@@ -101,7 +100,7 @@ static const struct svga_timing_regs ark_timing_regs     = {
 
 /* Module parameters */
 
-static char *mode = "640x480-8@60";
+static char *mode_option __devinitdata = "640x480-8@60";
 
 #ifdef CONFIG_MTRR
 static int mtrr = 1;
@@ -111,8 +110,10 @@ MODULE_AUTHOR("(c) 2007 Ondrej Zajicek <santiago@crfreenet.org>");
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("fbdev driver for ARK 2000PV");
 
-module_param(mode, charp, 0444);
-MODULE_PARM_DESC(mode, "Default video mode ('640x480-8@60', etc)");
+module_param(mode_option, charp, 0444);
+MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
+module_param_named(mode, mode_option, charp, 0444);
+MODULE_PARM_DESC(mode, "Default video mode ('640x480-8@60', etc) (deprecated)");
 
 #ifdef CONFIG_MTRR
 module_param(mtrr, int, 0444);
@@ -469,7 +470,7 @@ static void ark_dac_read_regs(void *data, u8 *code, int count)
 
        while (count != 0)
        {
-               vga_wseq(NULL, 0x1C, regval | (code[0] & 4) ? 0x80 : 0);
+               vga_wseq(NULL, 0x1C, regval | (code[0] & 4 ? 0x80 : 0));
                code[1] = vga_r(NULL, dac_regs[code[0] & 3]);
                count--;
                code += 2;
@@ -484,7 +485,7 @@ static void ark_dac_write_regs(void *data, u8 *code, int count)
 
        while (count != 0)
        {
-               vga_wseq(NULL, 0x1C, regval | (code[0] & 4) ? 0x80 : 0);
+               vga_wseq(NULL, 0x1C, regval | (code[0] & 4 ? 0x80 : 0));
                vga_w(NULL, dac_regs[code[0] & 3], code[1]);
                count--;
                code += 2;
@@ -941,7 +942,7 @@ static int __devinit ark_pci_probe(struct pci_dev *dev, const struct pci_device_
        }
 
        /* Allocate and fill driver data structure */
-       info = framebuffer_alloc(sizeof(struct arkfb_info), NULL);
+       info = framebuffer_alloc(sizeof(struct arkfb_info), &(dev->dev));
        if (! info) {
                dev_err(&(dev->dev), "cannot allocate memory\n");
                return -ENOMEM;
@@ -956,20 +957,20 @@ static int __devinit ark_pci_probe(struct pci_dev *dev, const struct pci_device_
        /* Prepare PCI device */
        rc = pci_enable_device(dev);
        if (rc < 0) {
-               dev_err(&(dev->dev), "cannot enable PCI device\n");
+               dev_err(info->device, "cannot enable PCI device\n");
                goto err_enable_device;
        }
 
        rc = pci_request_regions(dev, "arkfb");
        if (rc < 0) {
-               dev_err(&(dev->dev), "cannot reserve framebuffer region\n");
+               dev_err(info->device, "cannot reserve framebuffer region\n");
                goto err_request_regions;
        }
 
        par->dac = ics5342_init(ark_dac_read_regs, ark_dac_write_regs, info);
        if (! par->dac) {
                rc = -ENOMEM;
-               dev_err(&(dev->dev), "RAMDAC initialization failed\n");
+               dev_err(info->device, "RAMDAC initialization failed\n");
                goto err_dac;
        }
 
@@ -980,7 +981,7 @@ static int __devinit ark_pci_probe(struct pci_dev *dev, const struct pci_device_
        info->screen_base = pci_iomap(dev, 0, 0);
        if (! info->screen_base) {
                rc = -ENOMEM;
-               dev_err(&(dev->dev), "iomap for framebuffer failed\n");
+               dev_err(info->device, "iomap for framebuffer failed\n");
                goto err_iomap;
        }
 
@@ -999,22 +1000,22 @@ static int __devinit ark_pci_probe(struct pci_dev *dev, const struct pci_device_
        info->pseudo_palette = (void*) (par->pseudo_palette);
 
        /* Prepare startup mode */
-       rc = fb_find_mode(&(info->var), info, mode, NULL, 0, NULL, 8);
+       rc = fb_find_mode(&(info->var), info, mode_option, NULL, 0, NULL, 8);
        if (! ((rc == 1) || (rc == 2))) {
                rc = -EINVAL;
-               dev_err(&(dev->dev), "mode %s not found\n", mode);
+               dev_err(info->device, "mode %s not found\n", mode_option);
                goto err_find_mode;
        }
 
        rc = fb_alloc_cmap(&info->cmap, 256, 0);
        if (rc < 0) {
-               dev_err(&(dev->dev), "cannot allocate colormap\n");
+               dev_err(info->device, "cannot allocate colormap\n");
                goto err_alloc_cmap;
        }
 
        rc = register_framebuffer(info);
        if (rc < 0) {
-               dev_err(&(dev->dev), "cannot register framebugger\n");
+               dev_err(info->device, "cannot register framebugger\n");
                goto err_reg_fb;
        }
 
@@ -1088,7 +1089,7 @@ static int ark_pci_suspend (struct pci_dev* dev, pm_message_t state)
        struct fb_info *info = pci_get_drvdata(dev);
        struct arkfb_info *par = info->par;
 
-       dev_info(&(dev->dev), "suspend\n");
+       dev_info(info->device, "suspend\n");
 
        acquire_console_sem();
        mutex_lock(&(par->open_lock));
@@ -1119,16 +1120,13 @@ static int ark_pci_resume (struct pci_dev* dev)
        struct fb_info *info = pci_get_drvdata(dev);
        struct arkfb_info *par = info->par;
 
-       dev_info(&(dev->dev), "resume\n");
+       dev_info(info->device, "resume\n");
 
        acquire_console_sem();
        mutex_lock(&(par->open_lock));
 
-       if (par->ref_count == 0) {
-               mutex_unlock(&(par->open_lock));
-               release_console_sem();
-               return 0;
-       }
+       if (par->ref_count == 0)
+               goto fail;
 
        pci_set_power_state(dev, PCI_D0);
        pci_restore_state(dev);
@@ -1141,8 +1139,8 @@ static int ark_pci_resume (struct pci_dev* dev)
        arkfb_set_par(info);
        fb_set_suspend(info, 0);
 
-       mutex_unlock(&(par->open_lock));
 fail:
+       mutex_unlock(&(par->open_lock));
        release_console_sem();
        return 0;
 }
@@ -1190,7 +1188,7 @@ static int __init arkfb_init(void)
                return -ENODEV;
 
        if (option && *option)
-               mode = option;
+               mode_option = option;
 #endif
 
        pr_debug("arkfb: initializing\n");