[PATCH 4.1 089/159] iommu/fsl: Really fix init section(s) content

Greg Kroah-Hartman
2015-09-26T21:40:27Z

From: Emil Medve <Emilian.Medve@Freescale.com>

commit 57fb907da89977640ef183556a621336c1348fa0 upstream.

'0f1fb99 iommu/fsl: Fix section mismatch' was intended to address the modpost
warning and the potential crash. Crash which is actually easy to trigger with a
'unbind' followed by a 'bind' sequence. The fix is wrong as
fsl_of_pamu_driver.driver gets added by bus_add_driver() to a couple of
klist(s) which become invalid/corrupted as soon as the init sections are freed.
Depending on when/how the init sections storage is reused various/random errors
and crashes will happen

'cd70d46 iommu/fsl: Various cleanups' contains annotations that go further down
the wrong path laid by '0f1fb99 iommu/fsl: Fix section mismatch'

Now remove all the incorrect annotations from the above mentioned patches (not
exactly a revert) and those previously existing in the code, This fixes the
modpost warning(s), the unbind/bind sequence crashes and the random
errors/crashes

Fixes: 0f1fb99b62ce ("iommu/fsl: Fix section mismatch")
Fixes: cd70d4659ff3 ("iommu/fsl: Various cleanups")
Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com>
Acked-by: Varun Sethi <Varun.Sethi@freescale.com>
Tested-by: Madalin Bucur <Madalin.Bucur@freescale.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/iommu/fsl_pamu.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)

--- a/drivers/iommu/fsl_pamu.c
+++ b/drivers/iommu/fsl_pamu.c
@@ -41,7 +41,6 @@ struct pamu_isr_data {

static struct paace *ppaact;
static struct paace *spaact;
-static struct ome *omt __initdata;

/*
* Table for matching compatible strings, for device tree
@@ -50,7 +49,7 @@ static struct ome *omt __initdata;
* SOCs. For the older SOCs "fsl,qoriq-device-config-1.0"
* string would be used.
*/
-static const struct of_device_id guts_device_ids[] __initconst = {
+static const struct of_device_id guts_device_ids[] = {
{ .compatible = "fsl,qoriq-device-config-1.0", },
{ .compatible = "fsl,qoriq-device-config-2.0", },
{}
@@ -599,7 +598,7 @@ found_cpu_node:
* Memory accesses to QMAN and BMAN private memory need not be coherent, so
* clear the PAACE entry coherency attribute for them.
*/
-static void __init setup_qbman_paace(struct paace *ppaace, int paace_type)
+static void setup_qbman_paace(struct paace *ppaace, int paace_type)
{
switch (paace_type) {
case QMAN_PAACE:
@@ -629,7 +628,7 @@ static void __init setup_qbman_paace(str
* this table to translate device transaction to appropriate corenet
* transaction.
*/
-static void __init setup_omt(struct ome *omt)
+static void setup_omt(struct ome *omt)
{
struct ome *ome;

@@ -666,7 +665,7 @@ static void __init setup_omt(struct ome
* Get the maximum number of PAACT table entries
* and subwindows supported by PAMU
*/
-static void __init get_pamu_cap_values(unsigned long pamu_reg_base)
+static void get_pamu_cap_values(unsigned long pamu_reg_base)
{
u32 pc_val;

@@ -676,9 +675,9 @@ static void __init get_pamu_cap_values(u
}

/* Setup PAMU registers pointing to PAACT, SPAACT and OMT */
-static int __init setup_one_pamu(unsigned long pamu_reg_base, unsigned long pamu_reg_size,
- phys_addr_t ppaact_phys, phys_addr_t spaact_phys,
- phys_addr_t omt_phys)
+static int setup_one_pamu(unsigned long pamu_reg_base, unsigned long pamu_reg_size,
+ phys_addr_t ppaact_phys, phys_addr_t spaact_phys,
+ phys_addr_t omt_phys)
{
u32 *pc;
struct pamu_mmap_regs *pamu_regs;
@@ -720,7 +719,7 @@ static int __init setup_one_pamu(unsigne
}

/* Enable all device LIODNS */
-static void __init setup_liodns(void)
+static void setup_liodns(void)
{
int i, len;
struct paace *ppaace;
@@ -846,7 +845,7 @@ struct ccsr_law {
/*
* Create a coherence subdomain for a given memory block.
*/
-static int __init create_csd(phys_addr_t phys, size_t size, u32 csd_port_id)
+static int create_csd(phys_addr_t phys, size_t size, u32 csd_port_id)
{
struct device_node *np;
const __be32 *iprop;
@@ -988,7 +987,7 @@ error:
static const struct {
u32 svr;
u32 port_id;
-} port_id_map[] __initconst = {
+} port_id_map[] = {
{(SVR_P2040 << 8) | 0x10, 0xFF000000}, /* P2040 1.0 */
{(SVR_P2040 << 8) | 0x11, 0xFF000000}, /* P2040 1.1 */
{(SVR_P2041 << 8) | 0x10, 0xFF000000}, /* P2041 1.0 */
@@ -1006,7 +1005,7 @@ static const struct {

#define SVR_SECURITY 0x80000 /* The Security (E) bit */

-static int __init fsl_pamu_probe(struct platform_device *pdev)
+static int fsl_pamu_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
void __iomem *pamu_regs = NULL;
@@ -1022,6 +1021,7 @@ static int __init fsl_pamu_probe(struct
int irq;
phys_addr_t ppaact_phys;
phys_addr_t spaact_phys;
+ struct ome *omt;
phys_addr_t omt_phys;
size_t mem_size = 0;
unsigned int order = 0;
@@ -1200,7 +1200,7 @@ error:
return ret;
}

-static struct platform_driver fsl_of_pamu_driver __initdata = {
+static struct platform_driver fsl_of_pamu_driver = {
.driver = {
.name = "fsl-of-pamu",
},