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

* RE: [PATCH v2] iommu/fsl: Really fix init section(s) content
       [not found] <1427261328-23798-1-git-send-email-Emilian.Medve@Freescale.com>
@ 2015-08-03 12:29 ` Varun Sethi
  2015-08-17 14:58   ` Madalin-Cristian Bucur
  2015-08-18  9:32 ` Joerg Roedel
  1 sibling, 1 reply; 3+ messages in thread
From: Varun Sethi @ 2015-08-03 12:29 UTC (permalink / raw)
  To: iommu@lists.linux-foundation.org, joro@8bytes.org
  Cc: stable@vger.kernel.org, Medve Emilian-EMMEDVE1,
	Madalin-Cristian Bucur

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
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