PNP: check for conflicts with all resources, not just earlier ones

This patch removes a use of "idx" in pnp_check_port() and similar
functions, in preparation for replacing idx with a pointer to the
resource itself.

I split this out because it changes the behavior slightly: we used
to check for conflicts only with earlier resources, e.g., we checked
resource 2 against resources 0 and 1 but not against 3, 4, etc.  Now
we will check against all resources except 2.

Since resources are assigned in ascending order, the old behavior
was probably safe, but I don't like to depend on that ordering.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c
index f89945e..eab16e5 100644 (file)
--- a/drivers/pnp/resource.c
+++ b/drivers/pnp/resource.c
@@ -270,9 +270,9 @@ int pnp_check_port(struct pnp_dev *dev, int idx)
        }
 
        /* check for internal conflicts */
-       for (i = 0; i < PNP_MAX_PORT && i != idx; i++) {
+       for (i = 0; i < PNP_MAX_PORT; i++) {
                tres = &dev->res.port_resource[i];
-               if (tres->flags & IORESOURCE_IO) {
+               if (tres != res && tres->flags & IORESOURCE_IO) {
                        tport = &tres->start;
                        tend = &tres->end;
                        if (ranged_conflict(port, end, tport, tend))
@@ -331,9 +331,9 @@ int pnp_check_mem(struct pnp_dev *dev, int idx)
        }
 
        /* check for internal conflicts */
-       for (i = 0; i < PNP_MAX_MEM && i != idx; i++) {
+       for (i = 0; i < PNP_MAX_MEM; i++) {
                tres = &dev->res.mem_resource[i];
-               if (tres->flags & IORESOURCE_MEM) {
+               if (tres != res && tres->flags & IORESOURCE_MEM) {
                        taddr = &tres->start;
                        tend = &tres->end;
                        if (ranged_conflict(addr, end, taddr, tend))
@@ -391,9 +391,9 @@ int pnp_check_irq(struct pnp_dev *dev, int idx)
        }
 
        /* check for internal conflicts */
-       for (i = 0; i < PNP_MAX_IRQ && i != idx; i++) {
+       for (i = 0; i < PNP_MAX_IRQ; i++) {
                tres = &dev->res.irq_resource[i];
-               if (tres->flags & IORESOURCE_IRQ) {
+               if (tres != res && tres->flags & IORESOURCE_IRQ) {
                        if (tres->start == *irq)
                                return 0;
                }
@@ -465,9 +465,9 @@ int pnp_check_dma(struct pnp_dev *dev, int idx)
        }
 
        /* check for internal conflicts */
-       for (i = 0; i < PNP_MAX_DMA && i != idx; i++) {
+       for (i = 0; i < PNP_MAX_DMA; i++) {
                tres = &dev->res.dma_resource[i];
-               if (tres->flags & IORESOURCE_DMA) {
+               if (tres != res && tres->flags & IORESOURCE_DMA) {
                        if (tres->start == *dma)
                                return 0;
                }