PNP: increase the maximum number of resources
On some systems the number of resources(IO,MEM) returnedy by PNP device is
greater than the PNP constant, for example motherboard devices. It brings
that some resources can't be reserved and resource confilicts. This will
cause PCI resources are assigned wrongly in some systems, and cause hang.
This is a regression since we deleted ACPI motherboard driver and use PNP
system driver.
[akpm@linux-foundation.org: fix text and coding-style a bit]
Signed-off-by: Li Shaohua <shaohua.li@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Thomas Renninger <trenn@suse.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index 11adab1..3c5eb37 100644
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -83,9 +83,11 @@
while (!(res->irq_resource[i].flags & IORESOURCE_UNSET) &&
i < PNP_MAX_IRQ)
i++;
- if (i >= PNP_MAX_IRQ)
+ if (i >= PNP_MAX_IRQ) {
+ printk(KERN_ERR "pnpacpi: exceeded the max number of IRQ "
+ "resources: %d \n", PNP_MAX_IRQ);
return;
-
+ }
/*
* in IO-APIC mode, use overrided attribute. Two reasons:
* 1. BIOS bug in DSDT
@@ -181,6 +183,9 @@
}
res->dma_resource[i].start = dma;
res->dma_resource[i].end = dma;
+ } else {
+ printk(KERN_ERR "pnpacpi: exceeded the max number of DMA "
+ "resources: %d \n", PNP_MAX_DMA);
}
}
@@ -202,6 +207,9 @@
}
res->port_resource[i].start = io;
res->port_resource[i].end = io + len - 1;
+ } else {
+ printk(KERN_ERR "pnpacpi: exceeded the max number of IO "
+ "resources: %d \n", PNP_MAX_PORT);
}
}
@@ -225,6 +233,9 @@
res->mem_resource[i].start = mem;
res->mem_resource[i].end = mem + len - 1;
+ } else {
+ printk(KERN_ERR "pnpacpi: exceeded the max number of mem "
+ "resources: %d\n", PNP_MAX_MEM);
}
}