[PATCH] PCI: ls-gen4: Constify struct mobiveil_rp_ops

From: Christophe JAILLET
Date: Mon Jun 24 2024 - 16:18:56 EST


'struct mobiveil_rp_ops' is not modified in this driver.

Constifying this structure moves some data to a read-only section, so
increase overall security.

On a x86_64, with allmodconfig, as an example:
Before:
======
text data bss dec hex filename
4446 336 32 4814 12ce drivers/pci/controller/mobiveil/pcie-layerscape-gen4.o

After:
=====
text data bss dec hex filename
4454 328 32 4814 12ce drivers/pci/controller/mobiveil/pcie-layerscape-gen4.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
---
Compile tested-only
---
drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c | 2 +-
drivers/pci/controller/mobiveil/pcie-mobiveil.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c b/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c
index d7b7350f02dd..5af22bee913b 100644
--- a/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c
+++ b/drivers/pci/controller/mobiveil/pcie-layerscape-gen4.c
@@ -190,7 +190,7 @@ static void ls_g4_pcie_reset(struct work_struct *work)
ls_g4_pcie_enable_interrupt(pcie);
}

-static struct mobiveil_rp_ops ls_g4_pcie_rp_ops = {
+static const struct mobiveil_rp_ops ls_g4_pcie_rp_ops = {
.interrupt_init = ls_g4_pcie_interrupt_init,
};

diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
index 6082b8afbc31..e63abb887ee3 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
@@ -151,7 +151,7 @@ struct mobiveil_rp_ops {
struct mobiveil_root_port {
void __iomem *config_axi_slave_base; /* endpoint config base */
struct resource *ob_io_res;
- struct mobiveil_rp_ops *ops;
+ const struct mobiveil_rp_ops *ops;
int irq;
raw_spinlock_t intx_mask_lock;
struct irq_domain *intx_domain;
--
2.45.2