Merge tag 'fbdev-for-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev

Pull fbdev updates from Helge Deller:
 "Here's a fix for the smscufx USB graphics card to prevent a kernel
  crash if it's plugged in/out too fast.

  The other patches are mostly small cleanups, fixes in failure paths
  and code removal:

   - fix an use-after-free in smscufx USB graphics driver

   - add missing pci_disable_device() in tridentfb failure paths

   - correctly handle irq detection failure in mb862xx driver

   - fix resume code in omapfb/dss

   - drop unused code in controlfb, tridentfb, arkfb, imxfb and udlfb

   - convert uvesafb to use scnprintf() instead of snprintf()

   - convert gbefb to use dev_groups

   - add MODULE_DEVICE_TABLE() entry to vga16fb"

* tag 'fbdev-for-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
  fbdev: mb862xx: Fix check of return value from irq_of_parse_and_map()
  fbdev: vga16fb: Add missing MODULE_DEVICE_TABLE() entry
  fbdev: tridentfb: Fix missing pci_disable_device() in probe and remove
  fbdev: smscufx: Fix use-after-free in ufx_ops_open()
  fbdev: gbefb: Convert to use dev_groups
  fbdev: imxfb: Remove redundant dev_err() call
  fbdev: omapfb/dss: Use pm_runtime_resume_and_get() instead of pm_runtime_get_sync()
  fbdev: uvesafb: Convert snprintf to scnprintf
  fbdev: arkfb: Remove the unused function dac_read_reg()
  fbdev: tridentfb: Remove the unused function shadowmode_off()
  fbdev: controlfb: Remove the unused function VAR_MATCH()
  fbdev: udlfb: Remove redundant initialization to variable identical

16 files changed, 41 insertions, 71 deletions

diff --git a/drivers/video/fbdev/arkfb.c b/drivers/video/fbdev/arkfb.c
index a317d9fe1d67..5f8fec9e5fd4 100644
--- a/drivers/video/fbdev/arkfb.c
+++ b/drivers/video/fbdev/arkfb.c
@@ -318,14 +318,6 @@ struct dac_info
 	void *data;
 };
 
-
-static inline u8 dac_read_reg(struct dac_info *info, u8 reg)
-{
-	u8 code[2] = {reg, 0};
-	info->dac_read_regs(info->data, code, 1);
-	return code[1];
-}
-
 static inline void dac_read_regs(struct dac_info *info, u8 *code, int count)
 {
 	info->dac_read_regs(info->data, code, count);
diff --git a/drivers/video/fbdev/controlfb.c b/drivers/video/fbdev/controlfb.c
index aba46118b208..6bbcd9fc864e 100644
--- a/drivers/video/fbdev/controlfb.c
+++ b/drivers/video/fbdev/controlfb.c
@@ -108,13 +108,6 @@ static inline int PAR_EQUAL(struct fb_par_control *x, struct fb_par_control *y)
 	return (!DIRTY(cmode) && !DIRTY(xres) && !DIRTY(yres)
 		&& !DIRTY(vxres) && !DIRTY(vyres));
 }
-static inline int VAR_MATCH(struct fb_var_screeninfo *x, struct fb_var_screeninfo *y)
-{
-	return (!DIRTY(bits_per_pixel) && !DIRTY(xres)
-		&& !DIRTY(yres) && !DIRTY(xres_virtual)
-		&& !DIRTY(yres_virtual)
-		&& !DIRTY_CMAP(red) && !DIRTY_CMAP(green) && !DIRTY_CMAP(blue));
-}
 
 struct fb_info_control {
 	struct fb_info		info;
diff --git a/drivers/video/fbdev/gbefb.c b/drivers/video/fbdev/gbefb.c
index 6b4d5a7f3e15..1582c718329c 100644
--- a/drivers/video/fbdev/gbefb.c
+++ b/drivers/video/fbdev/gbefb.c
@@ -1072,17 +1072,12 @@ static ssize_t gbefb_show_rev(struct device *device, struct device_attribute *at
 
 static DEVICE_ATTR(revision, S_IRUGO, gbefb_show_rev, NULL);
 
-static void gbefb_remove_sysfs(struct device *dev)
-{
-	device_remove_file(dev, &dev_attr_size);
-	device_remove_file(dev, &dev_attr_revision);
-}
-
-static void gbefb_create_sysfs(struct device *dev)
-{
-	device_create_file(dev, &dev_attr_size);
-	device_create_file(dev, &dev_attr_revision);
-}
+static struct attribute *gbefb_attrs[] = {
+	&dev_attr_size.attr,
+	&dev_attr_revision.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(gbefb);
 
 /*
  * Initialization
@@ -1221,7 +1216,6 @@ static int gbefb_probe(struct platform_device *p_dev)
 	}
 
 	platform_set_drvdata(p_dev, info);
-	gbefb_create_sysfs(&p_dev->dev);
 
 	fb_info(info, "%s rev %d @ 0x%08x using %dkB memory\n",
 		info->fix.id, gbe_revision, (unsigned)GBE_BASE,
@@ -1248,7 +1242,6 @@ static int gbefb_remove(struct platform_device* p_dev)
 	gbe_turn_off();
 	arch_phys_wc_del(par->wc_cookie);
 	release_mem_region(GBE_BASE, sizeof(struct sgi_gbe));
-	gbefb_remove_sysfs(&p_dev->dev);
 	framebuffer_release(info);
 
 	return 0;
@@ -1259,6 +1252,7 @@ static struct platform_driver gbefb_driver = {
 	.remove = gbefb_remove,
 	.driver	= {
 		.name = "gbefb",
+		.dev_groups	= gbefb_groups,
 	},
 };
 
diff --git a/drivers/video/fbdev/imxfb.c b/drivers/video/fbdev/imxfb.c
index 94f3bc637fc8..51fde1b2a793 100644
--- a/drivers/video/fbdev/imxfb.c
+++ b/drivers/video/fbdev/imxfb.c
@@ -972,7 +972,6 @@ static int imxfb_probe(struct platform_device *pdev)
 
 	fbi->regs = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(fbi->regs)) {
-		dev_err(&pdev->dev, "Cannot map frame buffer registers\n");
 		ret = PTR_ERR(fbi->regs);
 		goto failed_ioremap;
 	}
diff --git a/drivers/video/fbdev/mb862xx/mb862xxfbdrv.c b/drivers/video/fbdev/mb862xx/mb862xxfbdrv.c
index 96800c9c9cd9..90c79e8c1157 100644
--- a/drivers/video/fbdev/mb862xx/mb862xxfbdrv.c
+++ b/drivers/video/fbdev/mb862xx/mb862xxfbdrv.c
@@ -693,7 +693,7 @@ static int of_platform_mb862xx_probe(struct platform_device *ofdev)
 	par->dev = dev;
 
 	par->irq = irq_of_parse_and_map(np, 0);
-	if (par->irq == NO_IRQ) {
+	if (!par->irq) {
 		dev_err(dev, "failed to map irq\n");
 		ret = -ENODEV;
 		goto fbrel;
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dispc.c b/drivers/video/fbdev/omap2/omapfb/dss/dispc.c
index b2d6e6df2161..92fb6b7e1f68 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/dispc.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dispc.c
@@ -519,11 +519,9 @@ int dispc_runtime_get(void)
 
 	DSSDBG("dispc_runtime_get\n");
 
-	r = pm_runtime_get_sync(&dispc.pdev->dev);
-	if (WARN_ON(r < 0)) {
-		pm_runtime_put_sync(&dispc.pdev->dev);
+	r = pm_runtime_resume_and_get(&dispc.pdev->dev);
+	if (WARN_ON(r < 0))
 		return r;
-	}
 	return 0;
 }
 EXPORT_SYMBOL(dispc_runtime_get);
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dsi.c b/drivers/video/fbdev/omap2/omapfb/dss/dsi.c
index d43b081d592f..54b0f034c2ed 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/dsi.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dsi.c
@@ -1136,11 +1136,9 @@ static int dsi_runtime_get(struct platform_device *dsidev)
 
 	DSSDBG("dsi_runtime_get\n");
 
-	r = pm_runtime_get_sync(&dsi->pdev->dev);
-	if (WARN_ON(r < 0)) {
-		pm_runtime_put_sync(&dsi->pdev->dev);
+	r = pm_runtime_resume_and_get(&dsi->pdev->dev);
+	if (WARN_ON(r < 0))
 		return r;
-	}
 	return 0;
 }
 
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dss.c b/drivers/video/fbdev/omap2/omapfb/dss/dss.c
index 45b9d3cf3860..335e0af4eec1 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/dss.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dss.c
@@ -767,11 +767,9 @@ int dss_runtime_get(void)
 
 	DSSDBG("dss_runtime_get\n");
 
-	r = pm_runtime_get_sync(&dss.pdev->dev);
-	if (WARN_ON(r < 0)) {
-		pm_runtime_put_sync(&dss.pdev->dev);
+	r = pm_runtime_resume_and_get(&dss.pdev->dev);
+	if (WARN_ON(r < 0))
 		return r;
-	}
 	return 0;
 }
 
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c b/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c
index 800bd108e834..0f39612e002e 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c
@@ -38,11 +38,9 @@ static int hdmi_runtime_get(void)
 
 	DSSDBG("hdmi_runtime_get\n");
 
-	r = pm_runtime_get_sync(&hdmi.pdev->dev);
-	if (WARN_ON(r < 0)) {
-		pm_runtime_put_sync(&hdmi.pdev->dev);
+	r = pm_runtime_resume_and_get(&hdmi.pdev->dev);
+	if (WARN_ON(r < 0))
 		return r;
-	}
 
 	return 0;
 }
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c b/drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c
index 2c03608addcd..bfccc2cb917a 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c
@@ -42,11 +42,9 @@ static int hdmi_runtime_get(void)
 
 	DSSDBG("hdmi_runtime_get\n");
 
-	r = pm_runtime_get_sync(&hdmi.pdev->dev);
-	if (WARN_ON(r < 0)) {
-		pm_runtime_put_sync(&hdmi.pdev->dev);
+	r = pm_runtime_resume_and_get(&hdmi.pdev->dev);
+	if (WARN_ON(r < 0))
 		return r;
-	}
 
 	return 0;
 }
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/venc.c b/drivers/video/fbdev/omap2/omapfb/dss/venc.c
index 905d642ff9ed..78a7309d25dd 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/venc.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/venc.c
@@ -347,11 +347,9 @@ static int venc_runtime_get(void)
 
 	DSSDBG("venc_runtime_get\n");
 
-	r = pm_runtime_get_sync(&venc.pdev->dev);
-	if (WARN_ON(r < 0)) {
-		pm_runtime_put_sync(&venc.pdev->dev);
+	r = pm_runtime_resume_and_get(&venc.pdev->dev);
+	if (WARN_ON(r < 0))
 		return r;
-	}
 	return 0;
 }
 
diff --git a/drivers/video/fbdev/smscufx.c b/drivers/video/fbdev/smscufx.c
index d7aa5511c361..e65bdc499c23 100644
--- a/drivers/video/fbdev/smscufx.c
+++ b/drivers/video/fbdev/smscufx.c
@@ -137,6 +137,8 @@ static int ufx_submit_urb(struct ufx_data *dev, struct urb * urb, size_t len);
 static int ufx_alloc_urb_list(struct ufx_data *dev, int count, size_t size);
 static void ufx_free_urb_list(struct ufx_data *dev);
 
+static DEFINE_MUTEX(disconnect_mutex);
+
 /* reads a control register */
 static int ufx_reg_read(struct ufx_data *dev, u32 index, u32 *data)
 {
@@ -1071,9 +1073,13 @@ static int ufx_ops_open(struct fb_info *info, int user)
 	if (user == 0 && !console)
 		return -EBUSY;
 
+	mutex_lock(&disconnect_mutex);
+
 	/* If the USB device is gone, we don't accept new opens */
-	if (dev->virtualized)
+	if (dev->virtualized) {
+		mutex_unlock(&disconnect_mutex);
 		return -ENODEV;
+	}
 
 	dev->fb_count++;
 
@@ -1097,6 +1103,8 @@ static int ufx_ops_open(struct fb_info *info, int user)
 	pr_debug("open /dev/fb%d user=%d fb_info=%p count=%d",
 		info->node, user, info, dev->fb_count);
 
+	mutex_unlock(&disconnect_mutex);
+
 	return 0;
 }
 
@@ -1741,6 +1749,8 @@ static void ufx_usb_disconnect(struct usb_interface *interface)
 {
 	struct ufx_data *dev;
 
+	mutex_lock(&disconnect_mutex);
+
 	dev = usb_get_intfdata(interface);
 
 	pr_debug("USB disconnect starting\n");
@@ -1761,6 +1771,8 @@ static void ufx_usb_disconnect(struct usb_interface *interface)
 	kref_put(&dev->kref, ufx_free);
 
 	/* consider ufx_data freed */
+
+	mutex_unlock(&disconnect_mutex);
 }
 
 static struct usb_driver ufx_driver = {
diff --git a/drivers/video/fbdev/tridentfb.c b/drivers/video/fbdev/tridentfb.c
index f9c3b1d38fc2..219ce7292337 100644
--- a/drivers/video/fbdev/tridentfb.c
+++ b/drivers/video/fbdev/tridentfb.c
@@ -1128,11 +1128,6 @@ static inline void shadowmode_on(struct tridentfb_par *par)
 	write3CE(par, CyberControl, read3CE(par, CyberControl) | 0x81);
 }
 
-static inline void shadowmode_off(struct tridentfb_par *par)
-{
-	write3CE(par, CyberControl, read3CE(par, CyberControl) & 0x7E);
-}
-
 /* Set the hardware to the requested video mode */
 static int tridentfb_set_par(struct fb_info *info)
 {
@@ -1475,7 +1470,7 @@ static int trident_pci_probe(struct pci_dev *dev,
 	if (err)
 		return err;
 
-	err = pci_enable_device(dev);
+	err = pcim_enable_device(dev);
 	if (err)
 		return err;
 
@@ -1715,12 +1710,10 @@ out_unmap2:
 	kfree(info->pixmap.addr);
 	if (info->screen_base)
 		iounmap(info->screen_base);
-	release_mem_region(tridentfb_fix.smem_start, tridentfb_fix.smem_len);
 	disable_mmio(info->par);
 out_unmap1:
 	if (default_par->io_virt)
 		iounmap(default_par->io_virt);
-	release_mem_region(tridentfb_fix.mmio_start, tridentfb_fix.mmio_len);
 	framebuffer_release(info);
 	return err;
 }
@@ -1735,8 +1728,6 @@ static void trident_pci_remove(struct pci_dev *dev)
 		i2c_del_adapter(&par->ddc_adapter);
 	iounmap(par->io_virt);
 	iounmap(info->screen_base);
-	release_mem_region(tridentfb_fix.smem_start, tridentfb_fix.smem_len);
-	release_mem_region(tridentfb_fix.mmio_start, tridentfb_fix.mmio_len);
 	kfree(info->pixmap.addr);
 	fb_dealloc_cmap(&info->cmap);
 	framebuffer_release(info);
diff --git a/drivers/video/fbdev/udlfb.c b/drivers/video/fbdev/udlfb.c
index c863244ef12c..216d49c9d47e 100644
--- a/drivers/video/fbdev/udlfb.c
+++ b/drivers/video/fbdev/udlfb.c
@@ -370,7 +370,7 @@ static int dlfb_trim_hline(const u8 *bback, const u8 **bfront, int *width_bytes)
 	const unsigned long *back = (const unsigned long *) bback;
 	const unsigned long *front = (const unsigned long *) *bfront;
 	const int width = *width_bytes / sizeof(unsigned long);
-	int identical = width;
+	int identical;
 	int start = width;
 	int end = width;
 
diff --git a/drivers/video/fbdev/uvesafb.c b/drivers/video/fbdev/uvesafb.c
index 4df6772802d7..fd5d701106e1 100644
--- a/drivers/video/fbdev/uvesafb.c
+++ b/drivers/video/fbdev/uvesafb.c
@@ -1580,7 +1580,7 @@ static ssize_t uvesafb_show_vendor(struct device *dev,
 	struct uvesafb_par *par = info->par;
 
 	if (par->vbe_ib.oem_vendor_name_ptr)
-		return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
+		return scnprintf(buf, PAGE_SIZE, "%s\n", (char *)
 			(&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
 	else
 		return 0;
@@ -1595,7 +1595,7 @@ static ssize_t uvesafb_show_product_name(struct device *dev,
 	struct uvesafb_par *par = info->par;
 
 	if (par->vbe_ib.oem_product_name_ptr)
-		return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
+		return scnprintf(buf, PAGE_SIZE, "%s\n", (char *)
 			(&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
 	else
 		return 0;
@@ -1610,7 +1610,7 @@ static ssize_t uvesafb_show_product_rev(struct device *dev,
 	struct uvesafb_par *par = info->par;
 
 	if (par->vbe_ib.oem_product_rev_ptr)
-		return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
+		return scnprintf(buf, PAGE_SIZE, "%s\n", (char *)
 			(&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
 	else
 		return 0;
@@ -1625,7 +1625,7 @@ static ssize_t uvesafb_show_oem_string(struct device *dev,
 	struct uvesafb_par *par = info->par;
 
 	if (par->vbe_ib.oem_string_ptr)
-		return snprintf(buf, PAGE_SIZE, "%s\n",
+		return scnprintf(buf, PAGE_SIZE, "%s\n",
 			(char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
 	else
 		return 0;
@@ -1639,7 +1639,7 @@ static ssize_t uvesafb_show_nocrtc(struct device *dev,
 	struct fb_info *info = dev_get_drvdata(dev);
 	struct uvesafb_par *par = info->par;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
+	return scnprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
 }
 
 static ssize_t uvesafb_store_nocrtc(struct device *dev,
diff --git a/drivers/video/fbdev/vga16fb.c b/drivers/video/fbdev/vga16fb.c
index 35cf51ae3292..af47f8217095 100644
--- a/drivers/video/fbdev/vga16fb.c
+++ b/drivers/video/fbdev/vga16fb.c
@@ -1421,6 +1421,7 @@ static const struct platform_device_id vga16fb_driver_id_table[] = {
 	{"vga-framebuffer", 0},
 	{ }
 };
+MODULE_DEVICE_TABLE(platform, vga16fb_driver_id_table);
 
 static struct platform_driver vga16fb_driver = {
 	.probe = vga16fb_probe,