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authorAndrey Smirnov <andrew.smirnov@gmail.com>2018-04-10 11:32:09 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-08-03 07:50:40 +0200
commit6cfd0d3c627f845ca6bcc560a57c0bb2632e4ebf (patch)
treeb89ca1853df34f6ddb174663df318dbf5f071fd6
parent62079c8371aaa08f072a3e41628e753f9696d6df (diff)
soc: imx: gpcv2: Do not pass static memory as platform data
[ Upstream commit 050f810e238f268670f14a8f8b793ba2dbf2e92f ] Platform device core assumes the ownership of dev.platform_data as well as that it is dynamically allocated and it will try to kfree it as a part of platform_device_release(). Change the code to use platform_device_add_data() n instead of a pointer to a static memory to avoid causing a BUG() when calling platform_device_put(). The problem can be reproduced by artificially enabling the error path of platform_device_add() call (around line 357). Note that this change also allows us to constify imx7_pgc_domains, since we no longer need to be able to modify it. Cc: Stefan Agner <stefan@agner.ch> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/soc/imx/gpcv2.c22
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c
index afc7ecc3c187..f4e3bd40c72e 100644
--- a/drivers/soc/imx/gpcv2.c
+++ b/drivers/soc/imx/gpcv2.c
@@ -155,7 +155,7 @@ static int imx7_gpc_pu_pgc_sw_pdn_req(struct generic_pm_domain *genpd)
return imx7_gpc_pu_pgc_sw_pxx_req(genpd, false);
}
-static struct imx7_pgc_domain imx7_pgc_domains[] = {
+static const struct imx7_pgc_domain imx7_pgc_domains[] = {
[IMX7_POWER_DOMAIN_MIPI_PHY] = {
.genpd = {
.name = "mipi-phy",
@@ -321,11 +321,6 @@ static int imx_gpcv2_probe(struct platform_device *pdev)
continue;
}
- domain = &imx7_pgc_domains[domain_index];
- domain->regmap = regmap;
- domain->genpd.power_on = imx7_gpc_pu_pgc_sw_pup_req;
- domain->genpd.power_off = imx7_gpc_pu_pgc_sw_pdn_req;
-
pd_pdev = platform_device_alloc("imx7-pgc-domain",
domain_index);
if (!pd_pdev) {
@@ -334,7 +329,20 @@ static int imx_gpcv2_probe(struct platform_device *pdev)
return -ENOMEM;
}
- pd_pdev->dev.platform_data = domain;
+ ret = platform_device_add_data(pd_pdev,
+ &imx7_pgc_domains[domain_index],
+ sizeof(imx7_pgc_domains[domain_index]));
+ if (ret) {
+ platform_device_put(pd_pdev);
+ of_node_put(np);
+ return ret;
+ }
+
+ domain = pd_pdev->dev.platform_data;
+ domain->regmap = regmap;
+ domain->genpd.power_on = imx7_gpc_pu_pgc_sw_pup_req;
+ domain->genpd.power_off = imx7_gpc_pu_pgc_sw_pdn_req;
+
pd_pdev->dev.parent = dev;
pd_pdev->dev.of_node = np;