lkml.org 
[lkml]   [2006]   [Feb]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 05/13] request_region fixes for ppc prep_request_io
Date

request_region fixes for ppc prep_request_io.


Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
---
arch/ppc/platforms/prep_setup.c | 51 ++++++++++++++++++++++++++++++++++------
1 files changed, 44 insertions(+), 7 deletions(-)
--- linux-2.6.16-rc4-mm2-orig/arch/ppc/platforms/prep_setup.c 2006-02-24 19:25:30.000000000 +0100
+++ linux-2.6.16-rc4-mm2/arch/ppc/platforms/prep_setup.c 2006-02-24 21:22:33.000000000 +0100
@@ -1064,20 +1064,57 @@ prep_map_io(void)
io_block_mapping(0xf0000000, PREP_ISA_MEM_BASE, 0x08000000, _PAGE_IO);
}

+static inline int
+prep_request_region(unsigned long start, unsigned long n, const char *name)
+{
+ struct resource *region;
+
+ region = request_region(start, n, name);
+ if (!region) {
+ printk(KERN_WARNING "prep_request_io: could not allocate "
+ "%s region\n", name);
+ return 0;
+ }
+ return 1;
+}
+
static int __init
prep_request_io(void)
{
- if (_machine == _MACH_prep) {
+ int tmp;
+
+ if (_machine != _MACH_prep)
+ return 0;
+
#ifdef CONFIG_NVRAM
- request_region(PREP_NVRAM_AS0, 0x8, "nvram");
+ tmp = prep_request_region(PREP_NVRAM_AS0, 0x8, "nvram");
+ if (!tmp)
+ goto out_nvram;
#endif
- request_region(0x00,0x20,"dma1");
- request_region(0x40,0x20,"timer");
- request_region(0x80,0x10,"dma page reg");
- request_region(0xc0,0x20,"dma2");
- }
+ tmp = prep_request_region(0x00,0x20,"dma1");
+ if (!tmp)
+ goto out_dma1;
+ tmp = prep_request_region(0x40,0x20,"timer");
+ if (!tmp)
+ goto out_timer;
+ tmp = prep_request_region(0x80,0x10,"dma page reg");
+ if (!tmp)
+ goto out_dma_page;
+ tmp = prep_request_region(0xc0,0x20,"dma2");
+ if (!tmp)
+ goto out_dma2;

return 0;
+ out_dma2:
+ release_region(0x80,0x10);
+ out_dma_page:
+ release_region(0x40,0x20);
+ out_timer:
+ release_region(0x00,0x20);
+ out_dma1:
+ release_region(PREP_NVRAM_AS0, 0x8);
+ out_nvram:
+ return -EBUSY;
}

device_initcall(prep_request_io);


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-02-24 21:50    [W:0.080 / U:0.008 seconds]
©2003-2011 Jasper Spaans. Advertise on this site