resource: Pass full extent of empty space to resource_alignf callback

__find_resource_space() calculates the full extent of empty space but only
passes the aligned space to resource_alignf callback. In some situations,
the callback may choose take advantage of the free space before the
requested alignment.

Pass the full extent of the calculated empty space to resource_alignf
callback as an additional parameter.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Xifer <xiferdev@gmail.com>
Link: https://patch.msgid.link/20260324165633.4583-3-ilpo.jarvinen@linux.intel.com

11 files changed, 23 insertions, 7 deletions

diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index 51a8a4c4572a..11df411b1d18 100644
--- a/arch/alpha/kernel/pci.c
+++ b/arch/alpha/kernel/pci.c
@@ -125,6 +125,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pcibios_fixup_final);
 
 resource_size_t
 pcibios_align_resource(void *data, const struct resource *res,
+		       const struct resource *empty_res,
 		       resource_size_t size, resource_size_t align)
 {
 	struct pci_dev *dev = data;
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index b5793e8fbdc1..5b9b4fcd0e54 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -560,7 +560,9 @@ char * __init pcibios_setup(char *str)
  * which might be mirrored at 0x0100-0x03ff..
  */
 resource_size_t pcibios_align_resource(void *data, const struct resource *res,
-				resource_size_t size, resource_size_t align)
+				       const struct resource *empty_res,
+				       resource_size_t size,
+				       resource_size_t align)
 {
 	struct pci_dev *dev = data;
 	resource_size_t start = res->start;
diff --git a/arch/m68k/kernel/pcibios.c b/arch/m68k/kernel/pcibios.c
index e6ab3f9ff5d8..1415f6e4e5ce 100644
--- a/arch/m68k/kernel/pcibios.c
+++ b/arch/m68k/kernel/pcibios.c
@@ -27,7 +27,9 @@
  * which might be mirrored at 0x0100-0x03ff..
  */
 resource_size_t pcibios_align_resource(void *data, const struct resource *res,
-	resource_size_t size, resource_size_t align)
+				       const struct resource *empty_res,
+				       resource_size_t size,
+				       resource_size_t align)
 {
 	resource_size_t start = res->start;
 
diff --git a/arch/mips/pci/pci-generic.c b/arch/mips/pci/pci-generic.c
index d2d68bac3d25..f4957c26efc7 100644
--- a/arch/mips/pci/pci-generic.c
+++ b/arch/mips/pci/pci-generic.c
@@ -22,7 +22,8 @@
  * which might have be mirrored at 0x0100-0x03ff..
  */
 resource_size_t pcibios_align_resource(void *data, const struct resource *res,
-				resource_size_t size, resource_size_t align)
+				       const struct resource *empty_res,
+				       resource_size_t size, resource_size_t align)
 {
 	struct pci_dev *dev = data;
 	resource_size_t start = res->start;
diff --git a/arch/mips/pci/pci-legacy.c b/arch/mips/pci/pci-legacy.c
index d04b7c1294b6..817e97402afe 100644
--- a/arch/mips/pci/pci-legacy.c
+++ b/arch/mips/pci/pci-legacy.c
@@ -52,6 +52,7 @@ unsigned long pci_address_to_pio(phys_addr_t address)
  */
 resource_size_t
 pcibios_align_resource(void *data, const struct resource *res,
+		       const struct resource *empty_res,
 		       resource_size_t size, resource_size_t align)
 {
 	struct pci_dev *dev = data;
diff --git a/arch/parisc/kernel/pci.c b/arch/parisc/kernel/pci.c
index cf285b17a5ae..f99b20795d5a 100644
--- a/arch/parisc/kernel/pci.c
+++ b/arch/parisc/kernel/pci.c
@@ -196,7 +196,9 @@ void __ref pcibios_init_bridge(struct pci_dev *dev)
  * than res->start.
  */
 resource_size_t pcibios_align_resource(void *data, const struct resource *res,
-				resource_size_t size, resource_size_t alignment)
+				       const struct resource *empty_res,
+				       resource_size_t size,
+				       resource_size_t alignment)
 {
 	resource_size_t mask, align, start = res->start;
 
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index a7a2fb605971..e7bfa15da043 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -1132,7 +1132,9 @@ static int skip_isa_ioresource_align(struct pci_dev *dev)
  * which might have be mirrored at 0x0100-0x03ff..
  */
 resource_size_t pcibios_align_resource(void *data, const struct resource *res,
-				resource_size_t size, resource_size_t align)
+				       const struct resource *empty_res,
+				       resource_size_t size,
+				       resource_size_t align)
 {
 	struct pci_dev *dev = data;
 	resource_size_t start = res->start;
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 2a430722cbe4..39bd2adfc240 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -266,6 +266,7 @@ static int zpci_cfg_store(struct zpci_dev *zdev, int offset, u32 val, u8 len)
 }
 
 resource_size_t pcibios_align_resource(void *data, const struct resource *res,
+				       const struct resource *empty_res,
 				       resource_size_t size,
 				       resource_size_t align)
 {
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index a3903304f33f..7a0522316ee3 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -168,7 +168,9 @@ subsys_initcall(pcibios_init);
  * modulo 0x400.
  */
 resource_size_t pcibios_align_resource(void *data, const struct resource *res,
-				resource_size_t size, resource_size_t align)
+				       const struct resource *empty_res,
+				       resource_size_t size,
+				       resource_size_t align)
 {
 	struct pci_dev *dev = data;
 	struct pci_channel *hose = dev->sysdata;
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index c4ec39ad276b..6fbd4b34c3f7 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -153,7 +153,8 @@ skip_isa_ioresource_align(struct pci_dev *dev) {
  */
 resource_size_t
 pcibios_align_resource(void *data, const struct resource *res,
-			resource_size_t size, resource_size_t align)
+		       const struct resource *empty_res,
+		       resource_size_t size, resource_size_t align)
 {
 	struct pci_dev *dev = data;
 	resource_size_t start = res->start;
diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c
index 62c900e400d6..64ccb7e0d92f 100644
--- a/arch/xtensa/kernel/pci.c
+++ b/arch/xtensa/kernel/pci.c
@@ -39,6 +39,7 @@
  */
 resource_size_t
 pcibios_align_resource(void *data, const struct resource *res,
+		       const struct resource *empty_res,
 		       resource_size_t size, resource_size_t align)
 {
 	struct pci_dev *dev = data;