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Subject[PATCH 2.6.7-mm3] cirrusfb: minor fixes
Testers welcome.

- fix unbalanced invocation of pci_enable_device();
- leaks plugged in cirrusfb_zorro_setup();
- move framebuffer_release() into cirrusfb_{pci/zorro}_unmap() to balance
cirrusfb_{pci/zorro}_setup();
- make cirrusfb_{pci/zorro}_setup() return adequate error codes when
something fails;
- cirrusfb_zorro_unmap: iounmap() now take as argument values previously
returned by ioremap().
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>

diff -puN drivers/video/cirrusfb.c~cirrusfb-00 drivers/video/cirrusfb.c
--- linux-2.6.7/drivers/video/cirrusfb.c~cirrusfb-00 2004-06-24 22:55:10.000000000 +0200
+++ linux-2.6.7-fr/drivers/video/cirrusfb.c 2004-06-28 21:10:41.000000000 +0200
@@ -2144,15 +2144,17 @@ static void get_pci_addrs (const struct

static void __devexit cirrusfb_pci_unmap (struct cirrusfb_info *cinfo)
{
- iounmap (cinfo->fbmem);
- release_mem_region(cinfo->fbmem_phys, cinfo->size);
+ struct pci_dev *pdev = cinfo->pdev;

+ iounmap(cinfo->fbmem);
#if 0 /* if system didn't claim this region, we would... */
release_mem_region(0xA0000, 65535);
#endif
-
if (release_io_ports)
release_region(0x3C0, 32);
+ pci_release_regions(pdev);
+ framebuffer_release(cinfo->info);
+ pci_disable_device(pdev);
}


@@ -2163,16 +2165,19 @@ static struct cirrusfb_info *cirrusfb_pc
struct fb_info *info;
cirrusfb_board_t btype;
unsigned long board_addr, board_size;
+ int ret;

- if (pci_enable_device(pdev) != 0) {
+ ret = pci_enable_device(pdev);
+ if (ret < 0) {
printk(KERN_ERR "cirrusfb: Cannot enable PCI device\n");
- return NULL;
+ goto err_out;
}

info = framebuffer_alloc(sizeof(struct cirrusfb_info), &pdev->dev);
if (!info) {
- printk (KERN_ERR "cirrusfb: could not allocate memory\n");
- return NULL;
+ printk(KERN_ERR "cirrusfb: could not allocate memory\n");
+ ret = -ENOMEM;
+ goto err_disable;
}

cinfo = info->par;
@@ -2202,25 +2207,30 @@ static struct cirrusfb_info *cirrusfb_pc
board_size = (btype == BT_GD5480) ?
32 * MB_ : cirrusfb_get_memsize (cinfo->regbase);

- if (!request_mem_region(board_addr, board_size, "cirrusfb")) {
+ ret = pci_request_regions(pdev, "cirrusfb");
+ if (ret <0) {
printk(KERN_ERR "cirrusfb: cannot reserve region 0x%lx, abort\n",
board_addr);
- framebuffer_release (info);
- return NULL;
+ goto err_release_fb;
}
#if 0 /* if the system didn't claim this region, we would... */
if (!request_mem_region(0xA0000, 65535, "cirrusfb")) {
- printk(KERN_ERR "cirrusfb: cannot reserve region 0x%lx, abort\n",
+ printk(KERN_ERR "cirrusfb: cannot reserve region 0x%lx, abort\n"
+,
0xA0000L);
- release_mem_region(board_addr, board_size);
- framebuffer_release (info);
- return NULL;
+ ret = -EBUSY;
+ goto err_release_regions;
}
#endif
if (request_region(0x3C0, 32, "cirrusfb"))
release_io_ports = 1;

- cinfo->fbmem = ioremap (board_addr, board_size);
+ cinfo->fbmem = ioremap(board_addr, board_size);
+ if (!cinfo->fbmem) {
+ ret = -EIO;
+ goto err_release_legacy;
+ }
+
cinfo->fbmem_phys = board_addr;
cinfo->size = board_size;

@@ -2228,6 +2238,21 @@ static struct cirrusfb_info *cirrusfb_pc
printk ("Cirrus Logic chipset on PCI bus\n");

return cinfo;
+
+err_release_legacy:
+ if (release_io_ports)
+ release_region(0x3C0, 32);
+#if 0
+ release_mem_region(0xA0000, 65535);
+err_release_regions:
+#endif
+ pci_release_regions(pdev);
+err_release_fb:
+ framebuffer_release(info);
+err_disable:
+ pci_disable_device(pdev);
+err_out:
+ return ERR_PTR(ret);
}
#endif /* CONFIG_PCI */

@@ -2266,7 +2291,7 @@ static int cirrusfb_zorro_find (struct z
}

printk (KERN_NOTICE "cirrusfb: no supported board found.\n");
- return -1;
+ return -ENODEV;
}


@@ -2275,30 +2300,35 @@ static void __devexit cirrusfb_zorro_unm
release_mem_region(cinfo->board_addr, cinfo->board_size);

if (cinfo->btype == BT_PICASSO4) {
- iounmap ((void *)cinfo->board_addr);
- iounmap ((void *)cinfo->fbmem_phys);
+ cinfo->regbase -= 0x600000;
+ iounmap ((void *)cinfo->regbase);
+ iounmap ((void *)cinfo->fbmem);
} else {
if (cinfo->board_addr > 0x01000000)
- iounmap ((void *)cinfo->board_addr);
+ iounmap ((void *)cinfo->fbmem);
}
+ framebuffer_release(cinfo->info);
}


-static struct cirrusfb_info *cirrusfb_zorro_setup ()
+static struct cirrusfb_info *cirrusfb_zorro_setup(void)
{
struct cirrusfb_info *cinfo;
struct fb_info *info;
cirrusfb_board_t btype;
struct zorro_dev *z = NULL, *z2 = NULL;
unsigned long board_addr, board_size, size;
+ int ret;

- if (cirrusfb_zorro_find (&z, &z2, &btype, &size))
- return NULL;
+ ret = cirrusfb_zorro_find (&z, &z2, &btype, &size);
+ if (ret < 0)
+ goto err_out;

info = framebuffer_alloc(sizeof(struct cirrusfb_info), &z->dev);
if (!info) {
printk (KERN_ERR "cirrusfb: could not allocate memory\n");
- return NULL;
+ ret = -ENOMEM;
+ goto err_out;
}

cinfo = info->par;
@@ -2316,11 +2346,14 @@ static struct cirrusfb_info *cirrusfb_zo
if (!request_mem_region(board_addr, board_size, "cirrusfb")) {
printk(KERN_ERR "cirrusfb: cannot reserve region 0x%lx, abort\n",
board_addr);
- return -1;
+ ret = -EBUSY;
+ goto err_release_fb;
}

printk (" RAM (%lu MB) at $%lx, ", board_size / MB_, board_addr);

+ ret = -EIO;
+
if (btype == BT_PICASSO4) {
printk (" REG at $%lx\n", board_addr + 0x600000);

@@ -2329,12 +2362,17 @@ static struct cirrusfb_info *cirrusfb_zo
/* for P4, map in its address space in 2 chunks (### TEST! ) */
/* (note the ugly hardcoded 16M number) */
cinfo->regbase = ioremap (board_addr, 16777216);
+ if (!cinfo->regbase)
+ goto err_release_region;
+
DPRINTK ("cirrusfb: Virtual address for board set to: $%p\n", cinfo->regbase);
cinfo->regbase += 0x600000;
cinfo->fbregs_phys = board_addr + 0x600000;

cinfo->fbmem_phys = board_addr + 16777216;
cinfo->fbmem = ioremap (info->fbmem_phys, 16777216);
+ if (!cinfo->fbmem)
+ goto err_unmap_regbase;
} else {
printk (" REG at $%lx\n", (unsigned long) z2->resource.start);

@@ -2343,6 +2381,8 @@ static struct cirrusfb_info *cirrusfb_zo
cinfo->fbmem = ioremap (board_addr, board_size);
else
cinfo->fbmem = (caddr_t) ZTWO_VADDR (board_addr);
+ if (!cinfo->fbmem)
+ goto err_release_region;

/* set address for REG area of board */
cinfo->regbase = (caddr_t) ZTWO_VADDR (z2->resource.start);
@@ -2354,6 +2394,16 @@ static struct cirrusfb_info *cirrusfb_zo
printk (KERN_INFO "Cirrus Logic chipset on Zorro bus\n");

return 0;
+
+err_unmap_regbase:
+ /* Parental advisory: explicit hack */
+ iounmap(cinfo->regbase - 0x600000);
+err_release_region:
+ release_region(board_addr, board_size);
+err_release_fb:
+ framebuffer_release(info);
+err_out:
+ return ERR_PTR(ret);
}
#endif /* CONFIG_ZORRO */

@@ -2430,8 +2480,10 @@ static int cirrusfb_pci_register (struct

cinfo = cirrusfb_bus_setup(pdev, ent);

- if (!cinfo)
- return -ENODEV;
+ if (IS_ERR(cinfo)) {
+ err = PTR_ERR(cinfo);
+ goto err_out;
+ }

info = cinfo->info;
btype = cinfo->btype;
@@ -2446,13 +2498,12 @@ static int cirrusfb_pci_register (struct
/* state, even though we haven't written the mode to the hw yet... */
info->var = cirrusfb_predefined[cirrusfb_def_mode].var;
info->var.activate = FB_ACTIVATE_NOW;
+
err = cirrusfb_decode_var(&info->var, &cinfo->currentmode, info);
- if(err) {
+ if (err < 0) {
/* should never happen */
DPRINTK("choking on default var... umm, no good.\n");
- cirrusfb_unmap (cinfo);
- framebuffer_release (info);
- return -EINVAL;
+ goto err_unmap_cirrusfb;
}

/* set all the vital stuff */
@@ -2460,16 +2511,21 @@ static int cirrusfb_pci_register (struct

pci_set_drvdata(pdev, info);

- if ((err = register_framebuffer (info)) < 0) {
+ err = register_framebuffer(info);
+ if (err < 0) {
printk (KERN_ERR "cirrusfb: could not register fb device; err = %d!\n", err);
- fb_dealloc_cmap(&info->cmap);
- cirrusfb_unmap (cinfo);
- framebuffer_release (info);
- return -EINVAL;
+ goto err_dealloc_cmap;
}

DPRINTK ("EXIT, returning 0\n");
return 0;
+
+err_dealloc_cmap:
+ fb_dealloc_cmap(&info->cmap);
+err_unmap_cirrusfb:
+ cirrusfb_unmap(cinfo);
+err_out:
+ return err;
}


@@ -2482,11 +2538,10 @@ static void __devexit cirrusfb_cleanup (
switch_monitor (cinfo, 0);
#endif

- cirrusfb_unmap (cinfo);
- fb_dealloc_cmap (&info->cmap);
unregister_framebuffer (info);
+ fb_dealloc_cmap (&info->cmap);
printk ("Framebuffer unregistered\n");
- framebuffer_release (info);
+ cirrusfb_unmap (cinfo);

DPRINTK ("EXIT\n");
}
_
-
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