[PATCH] PCI: designware: bail out if host_init failed
Jisheng Zhang
jszhang at marvell.com
Fri Nov 13 00:48:45 AEDT 2015
There's no reason to continue the initialization such as configure
register, scan root bus etc. if customized host_init() failed. This
patch tries to check the host_init result, bail out if failed.
Signed-off-by: Jisheng Zhang <jszhang at marvell.com>
---
drivers/pci/host/pci-dra7xx.c | 4 +++-
drivers/pci/host/pci-exynos.c | 4 +++-
drivers/pci/host/pci-imx6.c | 4 +++-
drivers/pci/host/pci-keystone.c | 4 +++-
drivers/pci/host/pci-layerscape.c | 25 ++++++++++++++++---------
drivers/pci/host/pcie-designware.c | 7 +++++--
drivers/pci/host/pcie-designware.h | 2 +-
drivers/pci/host/pcie-spear13xx.c | 4 +++-
8 files changed, 37 insertions(+), 17 deletions(-)
diff --git a/drivers/pci/host/pci-dra7xx.c b/drivers/pci/host/pci-dra7xx.c
index 8c36880..b3160a1 100644
--- a/drivers/pci/host/pci-dra7xx.c
+++ b/drivers/pci/host/pci-dra7xx.c
@@ -149,7 +149,7 @@ static void dra7xx_pcie_enable_interrupts(struct pcie_port *pp)
LEG_EP_INTERRUPTS);
}
-static void dra7xx_pcie_host_init(struct pcie_port *pp)
+static int dra7xx_pcie_host_init(struct pcie_port *pp)
{
dw_pcie_setup_rc(pp);
@@ -162,6 +162,8 @@ static void dra7xx_pcie_host_init(struct pcie_port *pp)
if (IS_ENABLED(CONFIG_PCI_MSI))
dw_pcie_msi_init(pp);
dra7xx_pcie_enable_interrupts(pp);
+
+ return 0;
}
static struct pcie_host_ops dra7xx_pcie_host_ops = {
diff --git a/drivers/pci/host/pci-exynos.c b/drivers/pci/host/pci-exynos.c
index 01095e1..57f370b 100644
--- a/drivers/pci/host/pci-exynos.c
+++ b/drivers/pci/host/pci-exynos.c
@@ -481,10 +481,12 @@ static int exynos_pcie_link_up(struct pcie_port *pp)
return 0;
}
-static void exynos_pcie_host_init(struct pcie_port *pp)
+static int exynos_pcie_host_init(struct pcie_port *pp)
{
exynos_pcie_establish_link(pp);
exynos_pcie_enable_interrupts(pp);
+
+ return 0;
}
static struct pcie_host_ops exynos_pcie_host_ops = {
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
index 22e8224..9a46680 100644
--- a/drivers/pci/host/pci-imx6.c
+++ b/drivers/pci/host/pci-imx6.c
@@ -425,7 +425,7 @@ static int imx6_pcie_establish_link(struct pcie_port *pp)
return 0;
}
-static void imx6_pcie_host_init(struct pcie_port *pp)
+static int imx6_pcie_host_init(struct pcie_port *pp)
{
imx6_pcie_assert_core_reset(pp);
@@ -439,6 +439,8 @@ static void imx6_pcie_host_init(struct pcie_port *pp)
if (IS_ENABLED(CONFIG_PCI_MSI))
dw_pcie_msi_init(pp);
+
+ return 0;
}
static void imx6_pcie_reset_phy(struct pcie_port *pp)
diff --git a/drivers/pci/host/pci-keystone.c b/drivers/pci/host/pci-keystone.c
index 0aa81bd..2604571 100644
--- a/drivers/pci/host/pci-keystone.c
+++ b/drivers/pci/host/pci-keystone.c
@@ -250,7 +250,7 @@ static int keystone_pcie_fault(unsigned long addr, unsigned int fsr,
return 0;
}
-static void __init ks_pcie_host_init(struct pcie_port *pp)
+static int __init ks_pcie_host_init(struct pcie_port *pp)
{
struct keystone_pcie *ks_pcie = to_keystone_pcie(pp);
u32 val;
@@ -277,6 +277,8 @@ static void __init ks_pcie_host_init(struct pcie_port *pp)
*/
hook_fault_code(17, keystone_pcie_fault, SIGBUS, 0,
"Asynchronous external abort");
+
+ return 0;
}
static struct pcie_host_ops keystone_pcie_host_ops = {
diff --git a/drivers/pci/host/pci-layerscape.c b/drivers/pci/host/pci-layerscape.c
index 3923bed..a6e9070 100644
--- a/drivers/pci/host/pci-layerscape.c
+++ b/drivers/pci/host/pci-layerscape.c
@@ -94,8 +94,9 @@ static int ls1021_pcie_link_up(struct pcie_port *pp)
return 1;
}
-static void ls1021_pcie_host_init(struct pcie_port *pp)
+static int ls1021_pcie_host_init(struct pcie_port *pp)
{
+ int ret;
struct ls_pcie *pcie = to_ls_pcie(pp);
u32 val, index[2];
@@ -103,15 +104,14 @@ static void ls1021_pcie_host_init(struct pcie_port *pp)
"fsl,pcie-scfg");
if (IS_ERR(pcie->scfg)) {
dev_err(pp->dev, "No syscfg phandle specified\n");
- pcie->scfg = NULL;
- return;
+ ret = PTR_ERR(pcie->scfg);
+ goto err;
}
- if (of_property_read_u32_array(pp->dev->of_node,
- "fsl,pcie-scfg", index, 2)) {
- pcie->scfg = NULL;
- return;
- }
+ ret = of_property_read_u32_array(pp->dev->of_node,
+ "fsl,pcie-scfg", index, 2);
+ if (ret)
+ goto err;
pcie->index = index[1];
dw_pcie_setup_rc(pp);
@@ -123,6 +123,11 @@ static void ls1021_pcie_host_init(struct pcie_port *pp)
val = ioread32(pcie->dbi + PCIE_STRFMR1);
val &= 0xffff;
iowrite32(val, pcie->dbi + PCIE_STRFMR1);
+
+ return 0;
+err:
+ pcie->scfg = NULL;
+ return ret;
}
static int ls_pcie_link_up(struct pcie_port *pp)
@@ -140,7 +145,7 @@ static int ls_pcie_link_up(struct pcie_port *pp)
return 1;
}
-static void ls_pcie_host_init(struct pcie_port *pp)
+static int ls_pcie_host_init(struct pcie_port *pp)
{
struct ls_pcie *pcie = to_ls_pcie(pp);
@@ -148,6 +153,8 @@ static void ls_pcie_host_init(struct pcie_port *pp)
ls_pcie_fix_class(pcie);
ls_pcie_clear_multifunction(pcie);
iowrite32(0, pcie->dbi + PCIE_DBI_RO_WR_EN);
+
+ return 0;
}
static int ls_pcie_msi_host_init(struct pcie_port *pp,
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 540f077..a80a9ba 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -515,8 +515,11 @@ int dw_pcie_host_init(struct pcie_port *pp)
}
}
- if (pp->ops->host_init)
- pp->ops->host_init(pp);
+ if (pp->ops->host_init) {
+ ret = pp->ops->host_init(pp);
+ if (ret)
+ return ret;
+ }
if (!pp->ops->rd_other_conf)
dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h
index 2356d29..7b5317f 100644
--- a/drivers/pci/host/pcie-designware.h
+++ b/drivers/pci/host/pcie-designware.h
@@ -63,7 +63,7 @@ struct pcie_host_ops {
int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
unsigned int devfn, int where, int size, u32 val);
int (*link_up)(struct pcie_port *pp);
- void (*host_init)(struct pcie_port *pp);
+ int (*host_init)(struct pcie_port *pp);
void (*msi_set_irq)(struct pcie_port *pp, int irq);
void (*msi_clear_irq)(struct pcie_port *pp, int irq);
phys_addr_t (*get_msi_addr)(struct pcie_port *pp);
diff --git a/drivers/pci/host/pcie-spear13xx.c b/drivers/pci/host/pcie-spear13xx.c
index b95b756..50b3b31 100644
--- a/drivers/pci/host/pcie-spear13xx.c
+++ b/drivers/pci/host/pcie-spear13xx.c
@@ -256,10 +256,12 @@ static int spear13xx_pcie_link_up(struct pcie_port *pp)
return 0;
}
-static void spear13xx_pcie_host_init(struct pcie_port *pp)
+static int spear13xx_pcie_host_init(struct pcie_port *pp)
{
spear13xx_pcie_establish_link(pp);
spear13xx_pcie_enable_interrupts(pp);
+
+ return 0;
}
static struct pcie_host_ops spear13xx_pcie_host_ops = {
--
2.6.2
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