One small correction: the subject line should read
[PATCH V2 3/3] PNP: Handle IORESOURCE_BITS in resource allocation
to reflect that this patch is part of the second version of this patch series.
--- Witold
On 11/04/12 22:51, Witold Szczeponik wrote:
> The patch copies the flags masked by IORESOURCE_BITS from a resource's
> template. This is necessary because the resource settings require proper
> IORESOURCE_BITS which are not known during the definition of these
> resources using the "/sys/bus/pnp/*/*/resources" interface. (In fact,
> they should not be set by the user as the resource templates define the
> proper settings.)
>
> If the patch is not applied, the resource flags are not initialized properly
> and obscure messages in the kernel log have been seen ("invalid flags").
>
> The patch is applied against Linux 3.3.x.
>
>
> Signed-off-by: Witold Szczeponik<Witold.Szczeponik@xxxxxxx>
>
>
> Index: linux/drivers/pnp/manager.c
> ===================================================================
> --- linux.orig/drivers/pnp/manager.c
> +++ linux/drivers/pnp/manager.c
> @@ -18,11 +18,27 @@
>
> DEFINE_MUTEX(pnp_res_mutex);
>
> +static struct resource *pnp_find_resource(struct pnp_dev *dev,
> + unsigned char rule,
> + unsigned long type,
> + unsigned int bar)
> +{
> + struct resource *res = pnp_get_resource(dev, type, bar);
> +
> + /* when the resource already exists, set its resource bits from rule */
> + if (res) {
> + res->flags&= ~IORESOURCE_BITS;
> + res->flags |= rule& IORESOURCE_BITS;
> + }
> +
> + return res;
> +}
> +
> static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
> {
> struct resource *res, local_res;
>
> - res = pnp_get_resource(dev, IORESOURCE_IO, idx);
> + res = pnp_find_resource(dev, rule->flags, IORESOURCE_IO, idx);
> if (res) {
> pnp_dbg(&dev->dev, " io %d already set to %#llx-%#llx "
> "flags %#lx\n", idx, (unsigned long long) res->start,
> @@ -65,7 +81,7 @@ static int pnp_assign_mem(struct pnp_dev
> {
> struct resource *res, local_res;
>
> - res = pnp_get_resource(dev, IORESOURCE_MEM, idx);
> + res = pnp_find_resource(dev, rule->flags, IORESOURCE_MEM, idx);
> if (res) {
> pnp_dbg(&dev->dev, " mem %d already set to %#llx-%#llx "
> "flags %#lx\n", idx, (unsigned long long) res->start,
> @@ -78,6 +94,7 @@ static int pnp_assign_mem(struct pnp_dev
> res->start = 0;
> res->end = 0;
>
> + /* ??? rule->flags restricted to 8 bits, all tests bogus ??? */
> if (!(rule->flags& IORESOURCE_MEM_WRITEABLE))
> res->flags |= IORESOURCE_READONLY;
> if (rule->flags& IORESOURCE_MEM_CACHEABLE)
> @@ -123,7 +140,7 @@ static int pnp_assign_irq(struct pnp_dev
> 5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2
> };
>
> - res = pnp_get_resource(dev, IORESOURCE_IRQ, idx);
> + res = pnp_find_resource(dev, rule->flags, IORESOURCE_IRQ, idx);
> if (res) {
> pnp_dbg(&dev->dev, " irq %d already set to %d flags %#lx\n",
> idx, (int) res->start, res->flags);
> @@ -182,7 +199,7 @@ static int pnp_assign_dma(struct pnp_dev
> 1, 3, 5, 6, 7, 0, 2, 4
> };
>
> - res = pnp_get_resource(dev, IORESOURCE_DMA, idx);
> + res = pnp_find_resource(dev, rule->flags, IORESOURCE_DMA, idx);
> if (res) {
> pnp_dbg(&dev->dev, " dma %d already set to %d flags %#lx\n",
> idx, (int) res->start, res->flags);
>
>
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