The owner module reference of the ahci platform's scsi_host is
initialized to libahci_platform's one, because these drivers use a
scsi_host_template defined in libahci_platform. So these drivers can
be unloaded even if the scsi device is being accessed.
This fixes it by pushing the scsi_host_template from libahci_platform
to all leaf drivers. The scsi_host_template is passed through a new
argument of ahci_platform_init_host().
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Cc: Hans de Goede <hdegoede@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: "James E.J. Bottomley" <JBottomley@xxxxxxxxxxxxx>
Cc: linux-ide@xxxxxxxxxxxxxxx
Cc: linux-scsi@xxxxxxxxxxxxxxx
---
* Changes in v2
- use the specific platform driver name for each sht
- add comments on top of ATA_BASE_SHT and AHCI_SHT
drivers/ata/ahci.h | 4 ++++
drivers/ata/ahci_da850.c | 11 +++++++++--
drivers/ata/ahci_imx.c | 11 +++++++++--
drivers/ata/ahci_mvebu.c | 11 +++++++++--
drivers/ata/ahci_platform.c | 11 +++++++++--
drivers/ata/ahci_st.c | 11 +++++++++--
drivers/ata/ahci_sunxi.c | 11 +++++++++--
drivers/ata/ahci_tegra.c | 11 +++++++++--
drivers/ata/ahci_xgene.c | 11 +++++++++--
drivers/ata/libahci_platform.c | 10 ++++------
include/linux/ahci_platform.h | 4 +++-
include/linux/libata.h | 6 ++++++
12 files changed, 89 insertions(+), 23 deletions(-)
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index 40f0e34..c2d0b06 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -354,6 +354,10 @@ extern int ahci_ignore_sss;
extern struct device_attribute *ahci_shost_attrs[];
extern struct device_attribute *ahci_sdev_attrs[];
+/*
+ * This must be instantiated by the edge drivers. Read the comments
+ * for ATA_BASE_SHT
+ */
#define AHCI_SHT(drv_name) \
ATA_NCQ_SHT(drv_name), \
.can_queue = AHCI_MAX_CMDS - 1, \
diff --git a/drivers/ata/ahci_da850.c b/drivers/ata/ahci_da850.c
index ce8a7a6..267a3d3 100644
--- a/drivers/ata/ahci_da850.c
+++ b/drivers/ata/ahci_da850.c
@@ -16,6 +16,8 @@
#include <linux/ahci_platform.h>
#include "ahci.h"
+#define DRV_NAME "ahci_da850"
+
/* SATA PHY Control Register offset from AHCI base */
#define SATA_P0PHYCR_REG 0x178
@@ -59,6 +61,10 @@ static const struct ata_port_info ahci_da850_port_info = {
.port_ops = &ahci_platform_ops,
};
+static struct scsi_host_template ahci_platform_sht = {
+ AHCI_SHT(DRV_NAME),
+};
+
static int ahci_da850_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -85,7 +91,8 @@ static int ahci_da850_probe(struct platform_device *pdev)
da850_sata_init(dev, pwrdn_reg, hpriv->mmio);
- rc = ahci_platform_init_host(pdev, hpriv, &ahci_da850_port_info);
+ rc = ahci_platform_init_host(pdev, hpriv, &ahci_da850_port_info,
+ &ahci_platform_sht);
if (rc)
goto disable_resources;
@@ -102,7 +109,7 @@ static struct platform_driver ahci_da850_driver = {
.probe = ahci_da850_probe,
.remove = ata_platform_remove_one,
.driver = {
- .name = "ahci_da850",
+ .name = DRV_NAME,
.pm = &ahci_da850_pm_ops,
},
};
diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
index 35d51c5..bd870ec 100644
--- a/drivers/ata/ahci_imx.c
+++ b/drivers/ata/ahci_imx.c
@@ -28,6 +28,8 @@
#include <linux/libata.h>
#include "ahci.h"
+#define DRV_NAME "ahci-imx"
+
enum {
/* Timer 1-ms Register */
IMX_TIMER1MS = 0x00e0,
@@ -524,6 +526,10 @@ static u32 imx_ahci_parse_props(struct device *dev,
return reg_value;
}
+static struct scsi_host_template ahci_platform_sht = {
+ AHCI_SHT(DRV_NAME),
+};
+
static int imx_ahci_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -620,7 +626,8 @@ static int imx_ahci_probe(struct platform_device *pdev)
reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000;
writel(reg_val, hpriv->mmio + IMX_TIMER1MS);
- ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info);
+ ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info,
+ &ahci_platform_sht);
if (ret)
goto disable_sata;
@@ -678,7 +685,7 @@ static struct platform_driver imx_ahci_driver = {
.probe = imx_ahci_probe,
.remove = ata_platform_remove_one,
.driver = {
- .name = "ahci-imx",
+ .name = DRV_NAME,
.of_match_table = imx_ahci_of_match,
.pm = &ahci_imx_pm_ops,
},
diff --git a/drivers/ata/ahci_mvebu.c b/drivers/ata/ahci_mvebu.c
index 64bb084..23716dd 100644
--- a/drivers/ata/ahci_mvebu.c
+++ b/drivers/ata/ahci_mvebu.c
@@ -19,6 +19,8 @@
#include <linux/platform_device.h>
#include "ahci.h"
+#define DRV_NAME "ahci-mvebu"
+
#define AHCI_VENDOR_SPECIFIC_0_ADDR 0xa0
#define AHCI_VENDOR_SPECIFIC_0_DATA 0xa4
@@ -67,6 +69,10 @@ static const struct ata_port_info ahci_mvebu_port_info = {
.port_ops = &ahci_platform_ops,
};
+static struct scsi_host_template ahci_platform_sht = {
+ AHCI_SHT(DRV_NAME),
+};
+
static int ahci_mvebu_probe(struct platform_device *pdev)
{
struct ahci_host_priv *hpriv;
@@ -88,7 +94,8 @@ static int ahci_mvebu_probe(struct platform_device *pdev)
ahci_mvebu_mbus_config(hpriv, dram);
ahci_mvebu_regret_option(hpriv);
- rc = ahci_platform_init_host(pdev, hpriv, &ahci_mvebu_port_info);
+ rc = ahci_platform_init_host(pdev, hpriv, &ahci_mvebu_port_info,
+ &ahci_platform_sht);
if (rc)
goto disable_resources;
@@ -114,7 +121,7 @@ static struct platform_driver ahci_mvebu_driver = {
.probe = ahci_mvebu_probe,
.remove = ata_platform_remove_one,
.driver = {
- .name = "ahci-mvebu",
+ .name = DRV_NAME,
.of_match_table = ahci_mvebu_of_match,
},
};
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 18d5398..78d6ae0 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -22,6 +22,8 @@
#include <linux/ahci_platform.h>
#include "ahci.h"
+#define DRV_NAME "ahci"
+
static const struct ata_port_info ahci_port_info = {
.flags = AHCI_FLAG_COMMON,
.pio_mask = ATA_PIO4,
@@ -29,6 +31,10 @@ static const struct ata_port_info ahci_port_info = {
.port_ops = &ahci_platform_ops,
};
+static struct scsi_host_template ahci_platform_sht = {
+ AHCI_SHT(DRV_NAME),
+};
+
static int ahci_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -46,7 +52,8 @@ static int ahci_probe(struct platform_device *pdev)
if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
- rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info);
+ rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info,
+ &ahci_platform_sht);
if (rc)
goto disable_resources;
@@ -75,7 +82,7 @@ static struct platform_driver ahci_driver = {
.probe = ahci_probe,
.remove = ata_platform_remove_one,
.driver = {
- .name = "ahci",
+ .name = DRV_NAME,
.of_match_table = ahci_of_match,
.pm = &ahci_pm_ops,
},
diff --git a/drivers/ata/ahci_st.c b/drivers/ata/ahci_st.c
index 2f9e831..bc971af 100644
--- a/drivers/ata/ahci_st.c
+++ b/drivers/ata/ahci_st.c
@@ -23,6 +23,8 @@
#include "ahci.h"
+#define DRV_NAME "st_ahci"
+
#define ST_AHCI_OOBR 0xbc
#define ST_AHCI_OOBR_WE BIT(31)
#define ST_AHCI_OOBR_CWMIN_SHIFT 24
@@ -140,6 +142,10 @@ static const struct ata_port_info st_ahci_port_info = {
.port_ops = &st_ahci_port_ops,
};
+static struct scsi_host_template ahci_platform_sht = {
+ AHCI_SHT(DRV_NAME),
+};
+
static int st_ahci_probe(struct platform_device *pdev)
{
struct st_ahci_drv_data *drv_data;
@@ -166,7 +172,8 @@ static int st_ahci_probe(struct platform_device *pdev)
if (err)
return err;
- err = ahci_platform_init_host(pdev, hpriv, &st_ahci_port_info);
+ err = ahci_platform_init_host(pdev, hpriv, &st_ahci_port_info,
+ &ahci_platform_sht);
if (err) {
ahci_platform_disable_resources(hpriv);
return err;
@@ -229,7 +236,7 @@ MODULE_DEVICE_TABLE(of, st_ahci_match);
static struct platform_driver st_ahci_driver = {
.driver = {
- .name = "st_ahci",
+ .name = DRV_NAME,
.pm = &st_ahci_pm_ops,
.of_match_table = of_match_ptr(st_ahci_match),
},
diff --git a/drivers/ata/ahci_sunxi.c b/drivers/ata/ahci_sunxi.c
index e2e0da5..b264374 100644
--- a/drivers/ata/ahci_sunxi.c
+++ b/drivers/ata/ahci_sunxi.c
@@ -27,6 +27,8 @@
#include <linux/regulator/consumer.h>
#include "ahci.h"
+#define DRV_NAME "ahci-sunxi"
+
/* Insmod parameters */
static bool enable_pmp;
module_param(enable_pmp, bool, 0);
@@ -169,6 +171,10 @@ static const struct ata_port_info ahci_sunxi_port_info = {
.port_ops = &ahci_platform_ops,
};
+static struct scsi_host_template ahci_platform_sht = {
+ AHCI_SHT(DRV_NAME),
+};
+
static int ahci_sunxi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -200,7 +206,8 @@ static int ahci_sunxi_probe(struct platform_device *pdev)
if (!enable_pmp)
hpriv->flags |= AHCI_HFLAG_NO_PMP;
- rc = ahci_platform_init_host(pdev, hpriv, &ahci_sunxi_port_info);
+ rc = ahci_platform_init_host(pdev, hpriv, &ahci_sunxi_port_info,
+ &ahci_platform_sht);
if (rc)
goto disable_resources;
@@ -251,7 +258,7 @@ static struct platform_driver ahci_sunxi_driver = {
.probe = ahci_sunxi_probe,
.remove = ata_platform_remove_one,
.driver = {
- .name = "ahci-sunxi",
+ .name = DRV_NAME,
.of_match_table = ahci_sunxi_of_match,
.pm = &ahci_sunxi_pm_ops,
},
diff --git a/drivers/ata/ahci_tegra.c b/drivers/ata/ahci_tegra.c
index 0329044..3a62eb2 100644
--- a/drivers/ata/ahci_tegra.c
+++ b/drivers/ata/ahci_tegra.c
@@ -31,6 +31,8 @@
#include "ahci.h"
+#define DRV_NAME "tegra-ahci"
+
#define SATA_CONFIGURATION_0 0x180
#define SATA_CONFIGURATION_EN_FPCI BIT(0)
@@ -289,6 +291,10 @@ static const struct of_device_id tegra_ahci_of_match[] = {
};
MODULE_DEVICE_TABLE(of, tegra_ahci_of_match);
+static struct scsi_host_template ahci_platform_sht = {
+ AHCI_SHT(DRV_NAME),
+};
+
static int tegra_ahci_probe(struct platform_device *pdev)
{
struct ahci_host_priv *hpriv;
@@ -354,7 +360,8 @@ static int tegra_ahci_probe(struct platform_device *pdev)
if (ret)
return ret;
- ret = ahci_platform_init_host(pdev, hpriv, &ahci_tegra_port_info);
+ ret = ahci_platform_init_host(pdev, hpriv, &ahci_tegra_port_info,
+ &ahci_platform_sht);
if (ret)
goto deinit_controller;
@@ -370,7 +377,7 @@ static struct platform_driver tegra_ahci_driver = {
.probe = tegra_ahci_probe,
.remove = ata_platform_remove_one,
.driver = {
- .name = "tegra-ahci",
+ .name = DRV_NAME,
.of_match_table = tegra_ahci_of_match,
},
/* LP0 suspend support not implemented */
diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
index cbcd208..1478449 100644
--- a/drivers/ata/ahci_xgene.c
+++ b/drivers/ata/ahci_xgene.c
@@ -30,6 +30,8 @@
#include <linux/phy/phy.h>
#include "ahci.h"
+#define DRV_NAME "xgene-ahci"
+
/* Max # of disk per a controller */
#define MAX_AHCI_CHN_PERCTR 2
@@ -446,6 +448,10 @@ static int xgene_ahci_mux_select(struct xgene_ahci_context *ctx)
return val & CFG_SATA_ENET_SELECT_MASK ? -1 : 0;
}
+static struct scsi_host_template ahci_platform_sht = {
+ AHCI_SHT(DRV_NAME),
+};
+
static int xgene_ahci_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -523,7 +529,8 @@ static int xgene_ahci_probe(struct platform_device *pdev)
skip_clk_phy:
hpriv->flags = AHCI_HFLAG_NO_PMP | AHCI_HFLAG_NO_NCQ;
- rc = ahci_platform_init_host(pdev, hpriv, &xgene_ahci_port_info);
+ rc = ahci_platform_init_host(pdev, hpriv, &xgene_ahci_port_info,
+ &ahci_platform_sht);
if (rc)
goto disable_resources;
@@ -545,7 +552,7 @@ static struct platform_driver xgene_ahci_driver = {
.probe = xgene_ahci_probe,
.remove = ata_platform_remove_one,
.driver = {
- .name = "xgene-ahci",
+ .name = DRV_NAME,
.of_match_table = xgene_ahci_of_match,
},
};
diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
index 0b03f90..3db4168 100644
--- a/drivers/ata/libahci_platform.c
+++ b/drivers/ata/libahci_platform.c
@@ -34,10 +34,6 @@ struct ata_port_operations ahci_platform_ops = {
};
EXPORT_SYMBOL_GPL(ahci_platform_ops);
-static struct scsi_host_template ahci_platform_sht = {
- AHCI_SHT("ahci_platform"),
-};
-
/**
* ahci_platform_enable_phys - Enable PHYs
* @hpriv: host private area to store config values
@@ -399,6 +395,7 @@ EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
* @pdev: platform device pointer for the host
* @hpriv: ahci-host private data for the host
* @pi_template: template for the ata_port_info to use
+ * @sht: scsi_host_template to use when registering
*
* This function does all the usual steps needed to bring up an
* ahci-platform host, note any necessary resources (ie clks, phys, etc.)
@@ -409,7 +406,8 @@ EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
*/
int ahci_platform_init_host(struct platform_device *pdev,
struct ahci_host_priv *hpriv,
- const struct ata_port_info *pi_template)
+ const struct ata_port_info *pi_template,
+ struct scsi_host_template *sht)
{
struct device *dev = &pdev->dev;
struct ata_port_info pi = *pi_template;
@@ -493,7 +491,7 @@ int ahci_platform_init_host(struct platform_device *pdev,
ahci_init_controller(host);
ahci_print_info(host, "platform");
- return ahci_host_activate(host, irq, &ahci_platform_sht);
+ return ahci_host_activate(host, irq, sht);
}
EXPORT_SYMBOL_GPL(ahci_platform_init_host);
diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
index 642d6ae..2e6673f 100644
--- a/include/linux/ahci_platform.h
+++ b/include/linux/ahci_platform.h
@@ -21,6 +21,7 @@ struct device;
struct ata_port_info;
struct ahci_host_priv;
struct platform_device;
+struct scsi_host_template;
int ahci_platform_enable_clks(struct ahci_host_priv *hpriv);
void ahci_platform_disable_clks(struct ahci_host_priv *hpriv);
@@ -30,7 +31,8 @@ struct ahci_host_priv *ahci_platform_get_resources(
struct platform_device *pdev);
int ahci_platform_init_host(struct platform_device *pdev,
struct ahci_host_priv *hpriv,
- const struct ata_port_info *pi_template);
+ const struct ata_port_info *pi_template,
+ struct scsi_host_template *sht);
int ahci_platform_suspend_host(struct device *dev);
int ahci_platform_resume_host(struct device *dev);
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 91f705d..61df823 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1340,6 +1340,12 @@ extern const struct ata_port_operations ata_base_port_ops;
extern const struct ata_port_operations sata_port_ops;
extern struct device_attribute *ata_common_sdev_attrs[];
+/*
+ * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated
+ * by the edge drivers. Because the 'module' field of sht must be the
+ * edge driver's module reference, otherwise the driver can be unloaded
+ * even if the scsi_device is being accessed.
+ */
#define ATA_BASE_SHT(drv_name) \
.module = THIS_MODULE, \
.name = drv_name, \
--
1.9.1
--
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