Merge tag 'fbdev-for-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev

Pull fbdev fixes and cleanups from Helge Deller:

 - fix double free and resource leaks in imsttfb

 - lots of remove callback cleanups and section mismatch fixes in
   omapfb, amifb and atmel_lcdfb

 - error code fix and memparse simplification in omapfb

* tag 'fbdev-for-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev: (31 commits)
  fbdev: fsl-diu-fb: mark wr_reg_wa() static
  fbdev: amifb: Convert to platform remove callback returning void
  fbdev: amifb: Mark driver struct with __refdata to prevent section mismatch warning
  fbdev: hyperv_fb: fix uninitialized local variable use
  fbdev: omapfb/tpd12s015: Convert to platform remove callback returning void
  fbdev: omapfb/tfp410: Convert to platform remove callback returning void
  fbdev: omapfb/sharp-ls037v7dw01: Convert to platform remove callback returning void
  fbdev: omapfb/opa362: Convert to platform remove callback returning void
  fbdev: omapfb/hdmi: Convert to platform remove callback returning void
  fbdev: omapfb/dvi: Convert to platform remove callback returning void
  fbdev: omapfb/dsi-cm: Convert to platform remove callback returning void
  fbdev: omapfb/dpi: Convert to platform remove callback returning void
  fbdev: omapfb/analog-tv: Convert to platform remove callback returning void
  fbdev: atmel_lcdfb: Convert to platform remove callback returning void
  fbdev: omapfb/tpd12s015: Don't put .remove() in .exit.text and drop suppress_bind_attrs
  fbdev: omapfb/tfp410: Don't put .remove() in .exit.text and drop suppress_bind_attrs
  fbdev: omapfb/sharp-ls037v7dw01: Don't put .remove() in .exit.text and drop suppress_bind_attrs
  fbdev: omapfb/opa362: Don't put .remove() in .exit.text and drop suppress_bind_attrs
  fbdev: omapfb/hdmi: Don't put .remove() in .exit.text and drop suppress_bind_attrs
  fbdev: omapfb/dvi: Don't put .remove() in .exit.text and drop suppress_bind_attrs
  ...

drivers/video/fbdev/amifb.c

@@ -3752,7 +3752,7 @@ static int __init amifb_probe(struct platform_device *pdev)
 }
 
 
-static int __exit amifb_remove(struct platform_device *pdev)
+static void __exit amifb_remove(struct platform_device *pdev)
 {
 	struct fb_info *info = platform_get_drvdata(pdev);
 
@@ -3765,11 +3765,16 @@ static int __exit amifb_remove(struct platform_device *pdev)
 	chipfree();
 	framebuffer_release(info);
 	amifb_video_off();
-	return 0;
 }
 
-static struct platform_driver amifb_driver = {
-	.remove = __exit_p(amifb_remove),
+/*
+ * amifb_remove() lives in .exit.text. For drivers registered via
+ * module_platform_driver_probe() this ok because they cannot get unboud at
+ * runtime. The driver needs to be marked with __refdata, otherwise modpost
+ * triggers a section mismatch warning.
+ */
+static struct platform_driver amifb_driver __refdata = {
+	.remove_new = __exit_p(amifb_remove),
 	.driver   = {
 		.name	= "amiga-video",
 	},

drivers/video/fbdev/atmel_lcdfb.c

@@ -220,7 +220,7 @@ static inline void atmel_lcdfb_power_control(struct atmel_lcdfb_info *sinfo, int
 	}
 }
 
-static const struct fb_fix_screeninfo atmel_lcdfb_fix __initconst = {
+static const struct fb_fix_screeninfo atmel_lcdfb_fix = {
 	.type		= FB_TYPE_PACKED_PIXELS,
 	.visual		= FB_VISUAL_TRUECOLOR,
 	.xpanstep	= 0,
@@ -841,7 +841,7 @@ static void atmel_lcdfb_task(struct work_struct *work)
 	atmel_lcdfb_reset(sinfo);
 }
 
-static int __init atmel_lcdfb_init_fbinfo(struct atmel_lcdfb_info *sinfo)
+static int atmel_lcdfb_init_fbinfo(struct atmel_lcdfb_info *sinfo)
 {
 	struct fb_info *info = sinfo->info;
 	int ret = 0;
@@ -1017,7 +1017,7 @@ static int atmel_lcdfb_of_init(struct atmel_lcdfb_info *sinfo)
 	return ret;
 }
 
-static int __init atmel_lcdfb_probe(struct platform_device *pdev)
+static int atmel_lcdfb_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct fb_info *info;
@@ -1223,14 +1223,14 @@ static int __init atmel_lcdfb_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int __exit atmel_lcdfb_remove(struct platform_device *pdev)
+static void atmel_lcdfb_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct fb_info *info = dev_get_drvdata(dev);
 	struct atmel_lcdfb_info *sinfo;
 
 	if (!info || !info->par)
-		return 0;
+		return;
 	sinfo = info->par;
 
 	cancel_work_sync(&sinfo->task);
@@ -1252,8 +1252,6 @@ static int __exit atmel_lcdfb_remove(struct platform_device *pdev)
 	}
 
 	framebuffer_release(info);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM
@@ -1301,7 +1299,8 @@ static int atmel_lcdfb_resume(struct platform_device *pdev)
 #endif
 
 static struct platform_driver atmel_lcdfb_driver = {
-	.remove		= __exit_p(atmel_lcdfb_remove),
+	.probe		= atmel_lcdfb_probe,
+	.remove_new	= atmel_lcdfb_remove,
 	.suspend	= atmel_lcdfb_suspend,
 	.resume		= atmel_lcdfb_resume,
 	.driver		= {
@@ -1309,8 +1308,7 @@ static struct platform_driver atmel_lcdfb_driver = {
 		.of_match_table	= atmel_lcdfb_dt_ids,
 	},
 };
-
-module_platform_driver_probe(atmel_lcdfb_driver, atmel_lcdfb_probe);
+module_platform_driver(atmel_lcdfb_driver);
 
 MODULE_DESCRIPTION("AT91 LCD Controller framebuffer driver");
 MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");

drivers/video/fbdev/fsl-diu-fb.c

@@ -490,7 +490,7 @@ static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s)
  * Workaround for failed writing desc register of planes.
  * Needed with MPC5121 DIU rev 2.0 silicon.
  */
-void wr_reg_wa(u32 *reg, u32 val)
+static void wr_reg_wa(u32 *reg, u32 val)
 {
 	do {
 		out_be32(reg, val);

drivers/video/fbdev/hyperv_fb.c

@@ -1013,6 +1013,8 @@ static int hvfb_getmem(struct hv_device *hdev, struct fb_info *info)
 	} else if (IS_ENABLED(CONFIG_SYSFB)) {
 		base = screen_info.lfb_base;
 		size = screen_info.lfb_size;
+	} else {
+		goto err1;
 	}
 
 	/*

drivers/video/fbdev/imsttfb.c

@@ -1421,7 +1421,6 @@ static int init_imstt(struct fb_info *info)
 	if ((info->var.xres * info->var.yres) * (info->var.bits_per_pixel >> 3) > info->fix.smem_len
 	    || !(compute_imstt_regvals(par, info->var.xres, info->var.yres))) {
 		printk("imsttfb: %ux%ux%u not supported\n", info->var.xres, info->var.yres, info->var.bits_per_pixel);
-		framebuffer_release(info);
 		return -ENODEV;
 	}
 
@@ -1453,14 +1452,11 @@ static int init_imstt(struct fb_info *info)
 	              FBINFO_HWACCEL_FILLRECT |
 	              FBINFO_HWACCEL_YPAN;
 
-	if (fb_alloc_cmap(&info->cmap, 0, 0)) {
-		framebuffer_release(info);
+	if (fb_alloc_cmap(&info->cmap, 0, 0))
 		return -ENODEV;
-	}
 
 	if (register_framebuffer(info) < 0) {
 		fb_dealloc_cmap(&info->cmap);
-		framebuffer_release(info);
 		return -ENODEV;
 	}
 
@@ -1500,8 +1496,8 @@ static int imsttfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	if (!request_mem_region(addr, size, "imsttfb")) {
 		printk(KERN_ERR "imsttfb: Can't reserve memory region\n");
-		framebuffer_release(info);
-		return -ENODEV;
+		ret = -ENODEV;
+		goto release_info;
 	}
 
 	switch (pdev->device) {
@@ -1518,36 +1514,39 @@ static int imsttfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 			printk(KERN_INFO "imsttfb: Device 0x%x unknown, "
 					 "contact maintainer.\n", pdev->device);
 			ret = -ENODEV;
-			goto error;
+			goto release_mem_region;
 	}
 
 	info->fix.smem_start = addr;
 	info->screen_base = (__u8 *)ioremap(addr, par->ramdac == IBM ?
 					    0x400000 : 0x800000);
 	if (!info->screen_base)
-		goto error;
+		goto release_mem_region;
 	info->fix.mmio_start = addr + 0x800000;
 	par->dc_regs = ioremap(addr + 0x800000, 0x1000);
 	if (!par->dc_regs)
-		goto error;
+		goto unmap_screen_base;
 	par->cmap_regs_phys = addr + 0x840000;
 	par->cmap_regs = (__u8 *)ioremap(addr + 0x840000, 0x1000);
 	if (!par->cmap_regs)
-		goto error;
+		goto unmap_dc_regs;
 	info->pseudo_palette = par->palette;
 	ret = init_imstt(info);
 	if (ret)
-		goto error;
+		goto unmap_cmap_regs;
 
 	pci_set_drvdata(pdev, info);
-	return ret;
+	return 0;
 
-error:
-	if (par->dc_regs)
-		iounmap(par->dc_regs);
-	if (info->screen_base)
-		iounmap(info->screen_base);
+unmap_cmap_regs:
+	iounmap(par->cmap_regs);
+unmap_dc_regs:
+	iounmap(par->dc_regs);
+unmap_screen_base:
+	iounmap(info->screen_base);
+release_mem_region:
 	release_mem_region(addr, size);
+release_info:
 	framebuffer_release(info);
 	return ret;
 }

drivers/video/fbdev/offb.c

@@ -423,11 +423,9 @@ static void offb_init_fb(struct platform_device *parent, const char *name,
 	fix = &info->fix;
 	var = &info->var;
 
-	if (name) {
-		strcpy(fix->id, "OFfb ");
-		strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
-		fix->id[sizeof(fix->id) - 1] = '\0';
-	} else
+	if (name)
+		snprintf(fix->id, sizeof(fix->id), "OFfb %s", name);
+	else
 		snprintf(fix->id, sizeof(fix->id), "OFfb %pOFn", dp);
 
 

drivers/video/fbdev/omap/omapfb_main.c

@@ -1643,17 +1643,16 @@ static int omapfb_do_probe(struct platform_device *pdev,
 		r = -ENOMEM;
 		goto cleanup;
 	}
-	fbdev->int_irq = platform_get_irq(pdev, 0);
-	if (fbdev->int_irq < 0) {
-		r = -ENXIO;
+
+	r = platform_get_irq(pdev, 0);
+	if (r < 0)
 		goto cleanup;
-	}
+	fbdev->int_irq = r;
 
-	fbdev->ext_irq = platform_get_irq(pdev, 1);
-	if (fbdev->ext_irq < 0) {
-		r = -ENXIO;
+	r = platform_get_irq(pdev, 1);
+	if (r < 0)
 		goto cleanup;
-	}
+	fbdev->ext_irq = r;
 
 	init_state++;
 
@@ -1857,20 +1856,13 @@ static int __init omapfb_setup(char *options)
 		if (!strncmp(this_opt, "accel", 5))
 			def_accel = 1;
 		else if (!strncmp(this_opt, "vram:", 5)) {
+			unsigned long long vram;
 			char *suffix;
-			unsigned long vram;
-			vram = (simple_strtoul(this_opt + 5, &suffix, 0));
+
+			vram = memparse(this_opt + 5, &suffix);
 			switch (suffix[0]) {
 			case '\0':
 				break;
-			case 'm':
-			case 'M':
-				vram *= 1024;
-				fallthrough;
-			case 'k':
-			case 'K':
-				vram *= 1024;
-				break;
 			default:
 				pr_debug("omapfb: invalid vram suffix %c\n",
 					 suffix[0]);

drivers/video/fbdev/omap2/omapfb/displays/connector-analog-tv.c

@@ -221,7 +221,7 @@ static int tvc_probe(struct platform_device *pdev)
 	return r;
 }
 
-static int __exit tvc_remove(struct platform_device *pdev)
+static void tvc_remove(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
@@ -233,8 +233,6 @@ static int __exit tvc_remove(struct platform_device *pdev)
 	tvc_disconnect(dssdev);
 
 	omap_dss_put_device(in);
-
-	return 0;
 }
 
 static const struct of_device_id tvc_of_match[] = {
@@ -247,11 +245,10 @@ MODULE_DEVICE_TABLE(of, tvc_of_match);
 
 static struct platform_driver tvc_connector_driver = {
 	.probe	= tvc_probe,
-	.remove	= __exit_p(tvc_remove),
+	.remove_new = tvc_remove,
 	.driver	= {
 		.name	= "connector-analog-tv",
 		.of_match_table = tvc_of_match,
-		.suppress_bind_attrs = true,
 	},
 };
 

drivers/video/fbdev/omap2/omapfb/displays/connector-dvi.c

@@ -303,7 +303,7 @@ static int dvic_probe(struct platform_device *pdev)
 	return r;
 }
 
-static int __exit dvic_remove(struct platform_device *pdev)
+static void dvic_remove(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
@@ -317,8 +317,6 @@ static int __exit dvic_remove(struct platform_device *pdev)
 	omap_dss_put_device(in);
 
 	i2c_put_adapter(ddata->i2c_adapter);
-
-	return 0;
 }
 
 static const struct of_device_id dvic_of_match[] = {
@@ -330,11 +328,10 @@ MODULE_DEVICE_TABLE(of, dvic_of_match);
 
 static struct platform_driver dvi_connector_driver = {
 	.probe	= dvic_probe,
-	.remove	= __exit_p(dvic_remove),
+	.remove_new = dvic_remove,
 	.driver	= {
 		.name	= "connector-dvi",
 		.of_match_table = dvic_of_match,
-		.suppress_bind_attrs = true,
 	},
 };
 

drivers/video/fbdev/omap2/omapfb/displays/connector-hdmi.c

@@ -249,7 +249,7 @@ static int hdmic_probe(struct platform_device *pdev)
 	return r;
 }
 
-static int __exit hdmic_remove(struct platform_device *pdev)
+static void hdmic_remove(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
@@ -261,8 +261,6 @@ static int __exit hdmic_remove(struct platform_device *pdev)
 	hdmic_disconnect(dssdev);
 
 	omap_dss_put_device(in);
-
-	return 0;
 }
 
 static const struct of_device_id hdmic_of_match[] = {
@@ -274,11 +272,10 @@ MODULE_DEVICE_TABLE(of, hdmic_of_match);
 
 static struct platform_driver hdmi_connector_driver = {
 	.probe	= hdmic_probe,
-	.remove	= __exit_p(hdmic_remove),
+	.remove_new = hdmic_remove,
 	.driver	= {
 		.name	= "connector-hdmi",
 		.of_match_table = hdmic_of_match,
-		.suppress_bind_attrs = true,
 	},
 };
 

drivers/video/fbdev/omap2/omapfb/displays/encoder-opa362.c

@@ -231,7 +231,7 @@ static int opa362_probe(struct platform_device *pdev)
 	return r;
 }
 
-static int __exit opa362_remove(struct platform_device *pdev)
+static void opa362_remove(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
@@ -248,8 +248,6 @@ static int __exit opa362_remove(struct platform_device *pdev)
 		opa362_disconnect(dssdev, dssdev->dst);
 
 	omap_dss_put_device(in);
-
-	return 0;
 }
 
 static const struct of_device_id opa362_of_match[] = {
@@ -260,11 +258,10 @@ MODULE_DEVICE_TABLE(of, opa362_of_match);
 
 static struct platform_driver opa362_driver = {
 	.probe	= opa362_probe,
-	.remove	= __exit_p(opa362_remove),
+	.remove_new = opa362_remove,
 	.driver	= {
 		.name	= "amplifier-opa362",
 		.of_match_table = opa362_of_match,
-		.suppress_bind_attrs = true,
 	},
 };
 

drivers/video/fbdev/omap2/omapfb/displays/encoder-tfp410.c

@@ -217,7 +217,7 @@ static int tfp410_probe(struct platform_device *pdev)
 	return r;
 }
 
-static int __exit tfp410_remove(struct platform_device *pdev)
+static void tfp410_remove(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
@@ -234,8 +234,6 @@ static int __exit tfp410_remove(struct platform_device *pdev)
 		tfp410_disconnect(dssdev, dssdev->dst);
 
 	omap_dss_put_device(in);
-
-	return 0;
 }
 
 static const struct of_device_id tfp410_of_match[] = {
@@ -247,11 +245,10 @@ MODULE_DEVICE_TABLE(of, tfp410_of_match);
 
 static struct platform_driver tfp410_driver = {
 	.probe	= tfp410_probe,
-	.remove	= __exit_p(tfp410_remove),
+	.remove_new = tfp410_remove,
 	.driver	= {
 		.name	= "tfp410",
 		.of_match_table = tfp410_of_match,
-		.suppress_bind_attrs = true,
 	},
 };
 

drivers/video/fbdev/omap2/omapfb/displays/encoder-tpd12s015.c

@@ -283,7 +283,7 @@ static int tpd_probe(struct platform_device *pdev)
 	return r;
 }
 
-static int __exit tpd_remove(struct platform_device *pdev)
+static void tpd_remove(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
@@ -300,8 +300,6 @@ static int __exit tpd_remove(struct platform_device *pdev)
 		tpd_disconnect(dssdev, dssdev->dst);
 
 	omap_dss_put_device(in);
-
-	return 0;
 }
 
 static const struct of_device_id tpd_of_match[] = {
@@ -313,11 +311,10 @@ MODULE_DEVICE_TABLE(of, tpd_of_match);
 
 static struct platform_driver tpd_driver = {
 	.probe	= tpd_probe,
-	.remove	= __exit_p(tpd_remove),
+	.remove_new = tpd_remove,
 	.driver	= {
 		.name	= "tpd12s015",
 		.of_match_table = tpd_of_match,
-		.suppress_bind_attrs = true,
 	},
 };
 

drivers/video/fbdev/omap2/omapfb/displays/panel-dpi.c

@@ -211,7 +211,7 @@ static int panel_dpi_probe(struct platform_device *pdev)
 	return r;
 }
 
-static int __exit panel_dpi_remove(struct platform_device *pdev)
+static void panel_dpi_remove(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
@@ -223,8 +223,6 @@ static int __exit panel_dpi_remove(struct platform_device *pdev)
 	panel_dpi_disconnect(dssdev);
 
 	omap_dss_put_device(in);
-
-	return 0;
 }
 
 static const struct of_device_id panel_dpi_of_match[] = {
@@ -236,11 +234,10 @@ MODULE_DEVICE_TABLE(of, panel_dpi_of_match);
 
 static struct platform_driver panel_dpi_driver = {
 	.probe = panel_dpi_probe,
-	.remove = __exit_p(panel_dpi_remove),
+	.remove_new = panel_dpi_remove,
 	.driver = {
 		.name = "panel-dpi",
 		.of_match_table = panel_dpi_of_match,
-		.suppress_bind_attrs = true,
 	},
 };
 

drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c

@@ -1241,7 +1241,7 @@ static int dsicm_probe(struct platform_device *pdev)
 	return r;
 }
 
-static int __exit dsicm_remove(struct platform_device *pdev)
+static void dsicm_remove(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
@@ -1269,8 +1269,6 @@ static int __exit dsicm_remove(struct platform_device *pdev)
 
 	/* reset, to be sure that the panel is in a valid state */
 	dsicm_hw_reset(ddata);
-
-	return 0;
 }
 
 static const struct of_device_id dsicm_of_match[] = {
@@ -1282,11 +1280,10 @@ MODULE_DEVICE_TABLE(of, dsicm_of_match);
 
 static struct platform_driver dsicm_driver = {
 	.probe = dsicm_probe,
-	.remove = __exit_p(dsicm_remove),
+	.remove_new = dsicm_remove,
 	.driver = {
 		.name = "panel-dsi-cm",
 		.of_match_table = dsicm_of_match,
-		.suppress_bind_attrs = true,
 	},
 };
 

drivers/video/fbdev/omap2/omapfb/displays/panel-sharp-ls037v7dw01.c

@@ -292,7 +292,7 @@ static int sharp_ls_probe(struct platform_device *pdev)
 	return r;
 }
 
-static int __exit sharp_ls_remove(struct platform_device *pdev)
+static void sharp_ls_remove(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
@@ -304,8 +304,6 @@ static int __exit sharp_ls_remove(struct platform_device *pdev)
 	sharp_ls_disconnect(dssdev);
 
 	omap_dss_put_device(in);
-
-	return 0;
 }
 
 static const struct of_device_id sharp_ls_of_match[] = {
@@ -317,11 +315,10 @@ MODULE_DEVICE_TABLE(of, sharp_ls_of_match);
 
 static struct platform_driver sharp_ls_driver = {
 	.probe = sharp_ls_probe,
-	.remove = __exit_p(sharp_ls_remove),
+	.remove_new = sharp_ls_remove,
 	.driver = {
 		.name = "panel-sharp-ls037v7dw01",
 		.of_match_table = sharp_ls_of_match,
-		.suppress_bind_attrs = true,
 	},
 };
 

drivers/video/fbdev/omap2/omapfb/vrfb.c

@@ -368,17 +368,10 @@ static int __init vrfb_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static void __exit vrfb_remove(struct platform_device *pdev)
-{
-	vrfb_loaded = false;
-}
-
 static struct platform_driver vrfb_driver = {
 	.driver.name	= "omapvrfb",
-	.remove		= __exit_p(vrfb_remove),
 };
-
-module_platform_driver_probe(vrfb_driver, vrfb_probe);
+builtin_platform_driver_probe(vrfb_driver, vrfb_probe);
 
 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
 MODULE_DESCRIPTION("OMAP VRFB");

drivers/video/fbdev/via/viafbdev.c

@@ -574,7 +574,7 @@ static int viafb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
 		break;
 
 	case VIAFB_SET_GAMMA_LUT:
-		viafb_gamma_table = memdup_user(argp, 256 * sizeof(u32));
+		viafb_gamma_table = memdup_array_user(argp, 256, sizeof(u32));
 		if (IS_ERR(viafb_gamma_table))
 			return PTR_ERR(viafb_gamma_table);
 		viafb_set_gamma_table(viafb_bpp, viafb_gamma_table);