Add error messages to the probe call.
Signed-off-by: Maciej W. Rozycki <[EMAIL PROTECTED]>
---
While they may rarely trigger, they may be useful when something weird is
going on. Also this is good style.
Checked with checkpatch.pl and at the runtime.
Please apply; don't be worried about the old version number.
Maciej
patch-mips-2.6.18-20060920-pmag-ba-err-1
diff -up --recursive --new-file
linux-mips-2.6.18-20060920.macro/drivers/video/pmag-ba-fb.c
linux-mips-2.6.18-20060920/drivers/video/pmag-ba-fb.c
--- linux-mips-2.6.18-20060920.macro/drivers/video/pmag-ba-fb.c 2006-12-16
16:45:08.000000000 +0000
+++ linux-mips-2.6.18-20060920/drivers/video/pmag-ba-fb.c 2006-12-16
16:45:23.000000000 +0000
@@ -147,16 +147,23 @@ static int __init pmagbafb_probe(struct
resource_size_t start, len;
struct fb_info *info;
struct pmagbafb_par *par;
+ int err = 0;
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
/* 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);
-
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