[PATCH v2] iommu/fsl: Really fix init section(s) content

[PATCH v2] iommu/fsl: Really fix init section(s) content

[Emil Medve]

'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>
Cc: stable@vger.kernel.org
---
 drivers/iommu/fsl_pamu.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c
index abeedc9..2570f2a 100644
--- 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(struct paace *ppaace, int  paace_type)
  * 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 *omt)
  * 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(unsigned long pamu_reg_base)
 }
 
 /* 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(unsigned long pamu_reg_base, unsigned long pamu
 }
 
 /* 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 platform_device *pdev)
 	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",
 	},
-- 
2.3.3

RE: [PATCH v2] iommu/fsl: Really fix init section(s) content

[Varun Sethi]

Hi Joerg,
This patch doesn't seem to be applied to the PAMU driver.

Regards
Varun

> -----Original Message-----
> From: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org [mailto:iommu-
> bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org] On Behalf Of Emil Medve
> Sent: Wednesday, March 25, 2015 10:59 AM
> To: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org; joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org
> Cc: stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; Medve Emilian-EMMEDVE1
> Subject: [PATCH v2] iommu/fsl: Really fix init section(s) content
> 
> '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-eDlz3WWmN0ll57MIdRCFDg@public.gmane.org>
> Acked-by: Varun Sethi <Varun.Sethi-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
> Cc: stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> ---
>  drivers/iommu/fsl_pamu.c | 26 +++++++++++++-------------
>  1 file changed, 13 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c index
> abeedc9..2570f2a 100644
> --- 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(struct paace
> *ppaace, int  paace_type)
>   * 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 *omt)
>   * 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(unsigned
> long pamu_reg_base)  }
> 
>  /* 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(unsigned long
> pamu_reg_base, unsigned long pamu  }
> 
>  /* 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
> platform_device *pdev)
>  	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",
>  	},
> --
> 2.3.3
> _______________________________________________
> iommu mailing list
> iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu

RE: [PATCH v2] iommu/fsl: Really fix init section(s) content

[Madalin-Cristian Bucur]

Patch working on all tested platforms: B4860QDS, P2041RDB,
P3041DS, P4080DS, P5020DS, P5040DS, T1024RDB, T1040RDB,
T2080RDB, T4240QDS.

Tested-by: Madalin Bucur <Madalin.Bucur@freescale.com>

> -----Original Message-----
> From: Sethi Varun-B16395
> Sent: Monday, August 03, 2015 3:29 PM
> To: iommu@lists.linux-foundation.org; joro@8bytes.org
> Cc: stable@vger.kernel.org; Medve Emilian-EMMEDVE1; Bucur Madalin-
> Cristian-B32716
> Subject: RE: [PATCH v2] iommu/fsl: Really fix init section(s) content
> 
> Hi Joerg,
> This patch doesn't seem to be applied to the PAMU driver.
> 
> Regards
> Varun
> 
> > -----Original Message-----
> > From: iommu-bounces@lists.linux-foundation.org [mailto:iommu-
> > bounces@lists.linux-foundation.org] On Behalf Of Emil Medve
> > Sent: Wednesday, March 25, 2015 10:59 AM
> > To: iommu@lists.linux-foundation.org; joro@8bytes.org
> > Cc: stable@vger.kernel.org; Medve Emilian-EMMEDVE1
> > Subject: [PATCH v2] iommu/fsl: Really fix init section(s) content
> >
> > '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>
> > Cc: stable@vger.kernel.org
> > ---
> >  drivers/iommu/fsl_pamu.c | 26 +++++++++++++-------------
> >  1 file changed, 13 insertions(+), 13 deletions(-)
> >
> > diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c index
> > abeedc9..2570f2a 100644
> > --- 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(struct paace
> > *ppaace, int  paace_type)
> >   * 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 *omt)
> >   * 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(unsigned
> > long pamu_reg_base)  }
> >
> >  /* 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(unsigned long
> > pamu_reg_base, unsigned long pamu  }
> >
> >  /* 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
> > platform_device *pdev)
> >  	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",
> >  	},
> > --
> > 2.3.3
> > _______________________________________________
> > iommu mailing list
> > iommu@lists.linux-foundation.org
> > https://lists.linuxfoundation.org/mailman/listinfo/iommu

RE: [PATCH v2] iommu/fsl: Really fix init section(s) content

[Varun Sethi]

[-- Attachment #1.1: Type: text/plain, Size: 8043 bytes --]

Thanks Madalin.

Joerg,
Can you please pick this patch.

Regards
Varun


-------- Original message --------
From: Bucur Madalin-Cristian-B32716
Date:08/17/2015 8:28 PM (GMT+05:30)
To: joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org,iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,Sethi Varun-B16395
Cc: stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: RE: [PATCH v2] iommu/fsl: Really fix init section(s) content

Patch working on all tested platforms: B4860QDS, P2041RDB,
P3041DS, P4080DS, P5020DS, P5040DS, T1024RDB, T1040RDB,
T2080RDB, T4240QDS.

Tested-by: Madalin Bucur <Madalin.Bucur-KZfg59tc24xl57MIdRCFDg@public.gmane.org>

> -----Original Message-----
> From: Sethi Varun-B16395
> Sent: Monday, August 03, 2015 3:29 PM
> To: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org; joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org
> Cc: stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; Medve Emilian-EMMEDVE1; Bucur Madalin-
> Cristian-B32716
> Subject: RE: [PATCH v2] iommu/fsl: Really fix init section(s) content
>
> Hi Joerg,
> This patch doesn't seem to be applied to the PAMU driver.
>
> Regards
> Varun
>
> > -----Original Message-----
> > From: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org [mailto:iommu-
> > bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org] On Behalf Of Emil Medve
> > Sent: Wednesday, March 25, 2015 10:59 AM
> > To: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org; joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org
> > Cc: stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; Medve Emilian-EMMEDVE1
> > Subject: [PATCH v2] iommu/fsl: Really fix init section(s) content
> >
> > '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-eDlz3WWmN0ll57MIdRCFDg@public.gmane.org>
> > Acked-by: Varun Sethi <Varun.Sethi-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
> > Cc: stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> > ---
> >  drivers/iommu/fsl_pamu.c | 26 +++++++++++++-------------
> >  1 file changed, 13 insertions(+), 13 deletions(-)
> >
> > diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c index
> > abeedc9..2570f2a 100644
> > --- 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(struct paace
> > *ppaace, int  paace_type)
> >   * 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 *omt)
> >   * 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(unsigned
> > long pamu_reg_base)  }
> >
> >  /* 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(unsigned long
> > pamu_reg_base, unsigned long pamu  }
> >
> >  /* 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
> > platform_device *pdev)
> >      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",
> >      },
> > --
> > 2.3.3
> > _______________________________________________
> > iommu mailing list
> > iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
> > https://lists.linuxfoundation.org/mailman/listinfo/iommu

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Re: [PATCH v2] iommu/fsl: Really fix init section(s) content

[Joerg Roedel]

On Wed, Mar 25, 2015 at 12:28:48AM -0500, Emil Medve wrote:
>  drivers/iommu/fsl_pamu.c | 26 +++++++++++++-------------
>  1 file changed, 13 insertions(+), 13 deletions(-)

Applied.