PNP: increase the maximum number of resources

patch a7839e960675b549f06209d18283d5cee2ce9261 in mainline.

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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index 0e3b8d0ff06b78a3432d9846a904e2c29a1f2e75..5abf5eaae7b5bba451b3e799888ab78ee714ec11 100644 (file)
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -82,9 +82,11 @@ static void pnpacpi_parse_allocated_irqresource(struct pnp_resource_table *res,
        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;
-
+       }
        res->irq_resource[i].flags = IORESOURCE_IRQ;    // Also clears _UNSET flag
        res->irq_resource[i].flags |= irq_flags(triggering, polarity);
        irq = acpi_register_gsi(gsi, triggering, polarity);
@@ -163,6 +165,9 @@ static void pnpacpi_parse_allocated_dmaresource(struct pnp_resource_table *res,
                }
                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);
        }
 }
 
@@ -184,6 +189,9 @@ static void pnpacpi_parse_allocated_ioresource(struct pnp_resource_table *res,
                }
                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);
        }
 }
 
@@ -207,6 +215,9 @@ static void pnpacpi_parse_allocated_memresource(struct pnp_resource_table *res,
 
                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);
        }
 }
 

diff --git a/include/linux/pnp.h b/include/linux/pnp.h
index 16b46aace3490413107532583ebeeb3ca85d7084..62decabd38f4e13f90f2e5686271982600bd623c 100644 (file)
--- a/include/linux/pnp.h
+++ b/include/linux/pnp.h
@@ -13,8 +13,8 @@
 #include <linux/errno.h>
 #include <linux/mod_devicetable.h>
 
-#define PNP_MAX_PORT           8
-#define PNP_MAX_MEM            4
+#define PNP_MAX_PORT           24
+#define PNP_MAX_MEM            12
 #define PNP_MAX_IRQ            2
 #define PNP_MAX_DMA            2
 #define PNP_NAME_LEN           50