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authorMaciej W. Rozycki <macro@linux-mips.org>2007-10-16 01:29:30 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:43:19 -0700
commit53ee1b5bbf937be29862ae8b3ea13af444af1f36 (patch)
tree3128ad654075f9d7c3368eea0bd15a09eeca73e1 /drivers/video/pmag-ba-fb.c
parent0b693eafc4be2bc9fceb318501930c66f38dbb10 (diff)
drivers/video/pmag-ba-fb.c: improve diagnostics
Add error messages to the probe call. While they may rarely trigger, they may be useful when something weird is going on. Also this is good style. [akpm@linux-foundation.org: remove unneeded initialisation] Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/pmag-ba-fb.c')
-rw-r--r--drivers/video/pmag-ba-fb.c34
1 files changed, 27 insertions, 7 deletions
diff --git a/drivers/video/pmag-ba-fb.c b/drivers/video/pmag-ba-fb.c
index 264d37243fa..3a3f80f6521 100644
--- a/drivers/video/pmag-ba-fb.c
+++ b/drivers/video/pmag-ba-fb.c
@@ -147,16 +147,23 @@ static int __init pmagbafb_probe(struct device *dev)
resource_size_t start, len;
struct fb_info *info;
struct pmagbafb_par *par;
+ int err;
info = framebuffer_alloc(sizeof(struct pmagbafb_par), dev);
- if (!info)
+ if (!info) {
+ printk(KERN_ERR "%s: Cannot allocate memory\n", dev->bus_id);
return -ENOMEM;
+ }
par = info->par;
dev_set_drvdata(dev, info);
- if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
+ if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
+ printk(KERN_ERR "%s: Cannot allocate color map\n",
+ dev->bus_id);
+ err = -ENOMEM;
goto err_alloc;
+ }
info->fbops = &pmagbafb_ops;
info->fix = pmagbafb_fix;
@@ -166,28 +173,41 @@ static int __init pmagbafb_probe(struct device *dev)
/* Request the I/O MEM resource. */
start = tdev->resource.start;
len = tdev->resource.end - start + 1;
- if (!request_mem_region(start, len, dev->bus_id))
+ if (!request_mem_region(start, len, dev->bus_id)) {
+ printk(KERN_ERR "%s: Cannot reserve FB region\n", dev->bus_id);
+ err = -EBUSY;
goto err_cmap;
+ }
/* MMIO mapping setup. */
info->fix.mmio_start = start;
par->mmio = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len);
- if (!par->mmio)
+ if (!par->mmio) {
+ printk(KERN_ERR "%s: Cannot map MMIO\n", dev->bus_id);
+ err = -ENOMEM;
goto err_resource;
+ }
par->dac = par->mmio + PMAG_BA_BT459;
/* Frame buffer mapping setup. */
info->fix.smem_start = start + PMAG_BA_FBMEM;
info->screen_base = ioremap_nocache(info->fix.smem_start,
info->fix.smem_len);
- if (!info->screen_base)
+ if (!info->screen_base) {
+ printk(KERN_ERR "%s: Cannot map FB\n", dev->bus_id);
+ err = -ENOMEM;
goto err_mmio_map;
+ }
info->screen_size = info->fix.smem_len;
pmagbafb_erase_cursor(info);
- if (register_framebuffer(info) < 0)
+ err = register_framebuffer(info);
+ if (err < 0) {
+ printk(KERN_ERR "%s: Cannot register framebuffer\n",
+ dev->bus_id);
goto err_smem_map;
+ }
get_device(dev);
@@ -211,7 +231,7 @@ err_cmap:
err_alloc:
framebuffer_release(info);
- return -ENXIO;
+ return err;
}
static int __exit pmagbafb_remove(struct device *dev)