diff options
| -rw-r--r-- | drivers/mtd/nand/diskonchip.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c index b68a4959f700..0afafa049ea1 100644 --- a/drivers/mtd/nand/diskonchip.c +++ b/drivers/mtd/nand/diskonchip.c @@ -1440,10 +1440,13 @@ static int __init doc_probe(unsigned long physadr) int reg, len, numchips; int ret = 0; + if (!request_mem_region(physadr, DOC_IOREMAP_LEN, NULL)) + return -EBUSY; virtadr = ioremap(physadr, DOC_IOREMAP_LEN); if (!virtadr) { printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr); - return -EIO; + ret = -EIO; + goto error_ioremap; } /* It's not possible to cleanly detect the DiskOnChip - the @@ -1629,6 +1632,10 @@ static int __init doc_probe(unsigned long physadr) WriteDOC(save_control, virtadr, DOCControl); fail: iounmap(virtadr); + +error_ioremap: + release_mem_region(physadr, DOC_IOREMAP_LEN); + return ret; } @@ -1645,6 +1652,7 @@ static void release_nanddoc(void) nextmtd = doc->nextdoc; nand_release(mtd); iounmap(doc->virtadr); + release_mem_region(doc->physadr, DOC_IOREMAP_LEN); kfree(mtd); } } |