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| author | Maciej W. Rozycki <macro@linux-mips.org> | 2007-10-16 01:29:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:43:19 -0700 |
| commit | 53ee1b5bbf937be29862ae8b3ea13af444af1f36 (patch) | |
| tree | 3128ad654075f9d7c3368eea0bd15a09eeca73e1 /drivers | |
| parent | 0b693eafc4be2bc9fceb318501930c66f38dbb10 (diff) | |
| download | linux-3.10-53ee1b5bbf937be29862ae8b3ea13af444af1f36.tar.gz linux-3.10-53ee1b5bbf937be29862ae8b3ea13af444af1f36.tar.bz2 linux-3.10-53ee1b5bbf937be29862ae8b3ea13af444af1f36.zip | |
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')
| -rw-r--r-- | drivers/video/pmag-ba-fb.c | 34 |
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) |