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pmagb-b-fb: improve diagnostics 

Add error messages to the probe call.

[adaplas]
On failure, return actual error value instead of -ENXIO.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Maciej W. Rozycki 2007-10-16 01:29:36 -07:00 committed by Linus Torvalds
parent 076a7dce9a
commit 840bc9b093
1 changed files with 27 additions and 7 deletions
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34
drivers/video/pmagb-b-fb.c
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@ -254,16 +254,23 @@ static int __init pmagbbfb_probe(struct device *dev)
struct pmagbbfb_par *par;
char freq0[12], freq1[12];
u32 vid_base;
int err;
info = framebuffer_alloc(sizeof(struct pmagbbfb_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 = &pmagbbfb_ops;
info->fix = pmagbbfb_fix;
@ -273,22 +280,31 @@ static int __init pmagbbfb_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->sfb = par->mmio + PMAGB_B_SFB;
par->dac = par->mmio + PMAGB_B_BT459;
/* Frame buffer mapping setup. */
info->fix.smem_start = start + PMAGB_B_FBMEM;
par->smem = ioremap_nocache(info->fix.smem_start, info->fix.smem_len);
if (!par->smem)
if (!par->smem) {
printk(KERN_ERR "%s: Cannot map FB\n", dev->bus_id);
err = -ENOMEM;
goto err_mmio_map;
}
vid_base = sfb_read(par, SFB_REG_VID_BASE);
info->screen_base = (void __iomem *)par->smem + vid_base * 0x1000;
info->screen_size = info->fix.smem_len - 2 * vid_base * 0x1000;
@ -297,8 +313,12 @@ static int __init pmagbbfb_probe(struct device *dev)
pmagbbfb_screen_setup(info);
pmagbbfb_osc_setup(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);
@ -330,7 +350,7 @@ err_cmap:
err_alloc:
framebuffer_release(info);
return -ENXIO;
return err;
}
static int __exit pmagbbfb_remove(struct device *dev)