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Subject[PATCH v2 1/6] mmc: dw_mmc: convert copy of struct device in struct dw_mci to a reference
Date
The 'struct dw_mci' maintains a copy of the pdev->dev instance instead of
maintaining a reference to that 'struct device' instance. Any resource
allocated using the device resource management kernel API with the instance
of 'struct device' in 'struct dw_mci' is then incorrect. Fix this by
converting the copy of 'struct device' in 'struct dw_mci' to a reference.

Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
---
drivers/mmc/host/dw_mmc-pltfm.c | 2 +-
drivers/mmc/host/dw_mmc.c | 54 +++++++++++++++++++-------------------
include/linux/mmc/dw_mmc.h | 2 +-
3 files changed, 29 insertions(+), 29 deletions(-)
diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c
index 92ec3eb..9a63299 100644
--- a/drivers/mmc/host/dw_mmc-pltfm.c
+++ b/drivers/mmc/host/dw_mmc-pltfm.c
@@ -43,7 +43,7 @@ static int dw_mci_pltfm_probe(struct platform_device *pdev)
goto err_free;
}

- host->dev = pdev->dev;
+ host->dev = &pdev->dev;
host->irq_flags = 0;
host->pdata = pdev->dev.platform_data;
ret = -ENOMEM;
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 1532357..01d870a 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -266,7 +266,7 @@ static void dw_mci_start_command(struct dw_mci *host,
struct mmc_command *cmd, u32 cmd_flags)
{
host->cmd = cmd;
- dev_vdbg(&host->dev,
+ dev_vdbg(host->dev,
"start command: ARGR=0x%08x CMDR=0x%08x\n",
cmd->arg, cmd_flags);

@@ -308,7 +308,7 @@ static void dw_mci_dma_cleanup(struct dw_mci *host)

if (data)
if (!data->host_cookie)
- dma_unmap_sg(&host->dev,
+ dma_unmap_sg(host->dev,
data->sg,
data->sg_len,
dw_mci_get_dma_dir(data));
@@ -334,7 +334,7 @@ static void dw_mci_idmac_complete_dma(struct dw_mci *host)
{
struct mmc_data *data = host->data;

- dev_vdbg(&host->dev, "DMA complete\n");
+ dev_vdbg(host->dev, "DMA complete\n");

host->dma_ops->cleanup(host);

@@ -462,7 +462,7 @@ static int dw_mci_pre_dma_transfer(struct dw_mci *host,
return -EINVAL;
}

- sg_len = dma_map_sg(&host->dev,
+ sg_len = dma_map_sg(host->dev,
data->sg,
data->sg_len,
dw_mci_get_dma_dir(data));
@@ -505,7 +505,7 @@ static void dw_mci_post_req(struct mmc_host *mmc,
return;

if (data->host_cookie)
- dma_unmap_sg(&slot->host->dev,
+ dma_unmap_sg(slot->host->dev,
data->sg,
data->sg_len,
dw_mci_get_dma_dir(data));
@@ -531,7 +531,7 @@ static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data)

host->using_dma = 1;

- dev_vdbg(&host->dev,
+ dev_vdbg(host->dev,
"sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n",
(unsigned long)host->sg_cpu, (unsigned long)host->sg_dma,
sg_len);
@@ -889,12 +889,12 @@ static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq)
slot = list_entry(host->queue.next,
struct dw_mci_slot, queue_node);
list_del(&slot->queue_node);
- dev_vdbg(&host->dev, "list not empty: %s is next\n",
+ dev_vdbg(host->dev, "list not empty: %s is next\n",
mmc_hostname(slot->mmc));
host->state = STATE_SENDING_CMD;
dw_mci_start_request(host, slot);
} else {
- dev_vdbg(&host->dev, "list empty\n");
+ dev_vdbg(host->dev, "list empty\n");
host->state = STATE_IDLE;
}

@@ -1033,7 +1033,7 @@ static void dw_mci_tasklet_func(unsigned long priv)
data->bytes_xfered = 0;
data->error = -ETIMEDOUT;
} else {
- dev_err(&host->dev,
+ dev_err(host->dev,
"data FIFO error "
"(status=%08x)\n",
status);
@@ -1750,7 +1750,7 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
struct mmc_host *mmc;
struct dw_mci_slot *slot;

- mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), &host->dev);
+ mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), host->dev);
if (!mmc)
return -ENOMEM;

@@ -1862,10 +1862,10 @@ static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id)
static void dw_mci_init_dma(struct dw_mci *host)
{
/* Alloc memory for sg translation */
- host->sg_cpu = dma_alloc_coherent(&host->dev, PAGE_SIZE,
+ host->sg_cpu = dma_alloc_coherent(host->dev, PAGE_SIZE,
&host->sg_dma, GFP_KERNEL);
if (!host->sg_cpu) {
- dev_err(&host->dev, "%s: could not alloc DMA memory\n",
+ dev_err(host->dev, "%s: could not alloc DMA memory\n",
__func__);
goto no_dma;
}
@@ -1873,7 +1873,7 @@ static void dw_mci_init_dma(struct dw_mci *host)
/* Determine which DMA interface to use */
#ifdef CONFIG_MMC_DW_IDMAC
host->dma_ops = &dw_mci_idmac_ops;
- dev_info(&host->dev, "Using internal DMA controller.\n");
+ dev_info(host->dev, "Using internal DMA controller.\n");
#endif

if (!host->dma_ops)
@@ -1882,12 +1882,12 @@ static void dw_mci_init_dma(struct dw_mci *host)
if (host->dma_ops->init && host->dma_ops->start &&
host->dma_ops->stop && host->dma_ops->cleanup) {
if (host->dma_ops->init(host)) {
- dev_err(&host->dev, "%s: Unable to initialize "
+ dev_err(host->dev, "%s: Unable to initialize "
"DMA Controller.\n", __func__);
goto no_dma;
}
} else {
- dev_err(&host->dev, "DMA initialization not found.\n");
+ dev_err(host->dev, "DMA initialization not found.\n");
goto no_dma;
}

@@ -1895,7 +1895,7 @@ static void dw_mci_init_dma(struct dw_mci *host)
return;

no_dma:
- dev_info(&host->dev, "Using PIO mode.\n");
+ dev_info(host->dev, "Using PIO mode.\n");
host->use_dma = 0;
return;
}
@@ -1927,19 +1927,19 @@ int dw_mci_probe(struct dw_mci *host)
u32 fifo_size;

if (!host->pdata || !host->pdata->init) {
- dev_err(&host->dev,
+ dev_err(host->dev,
"Platform data must supply init function\n");
return -ENODEV;
}

if (!host->pdata->select_slot && host->pdata->num_slots > 1) {
- dev_err(&host->dev,
+ dev_err(host->dev,
"Platform data must supply select_slot function\n");
return -ENODEV;
}

if (!host->pdata->bus_hz) {
- dev_err(&host->dev,
+ dev_err(host->dev,
"Platform data must supply bus speed\n");
return -ENODEV;
}
@@ -1981,7 +1981,7 @@ int dw_mci_probe(struct dw_mci *host)
}

/* Reset all blocks */
- if (!mci_wait_reset(&host->dev, host)) {
+ if (!mci_wait_reset(host->dev, host)) {
ret = -ENODEV;
goto err_dmaunmap;
}
@@ -2047,7 +2047,7 @@ int dw_mci_probe(struct dw_mci *host)
* Need to check the version-id and set data-offset for DATA register.
*/
host->verid = SDMMC_GET_VERID(mci_readl(host, VERID));
- dev_info(&host->dev, "Version ID is %04x\n", host->verid);
+ dev_info(host->dev, "Version ID is %04x\n", host->verid);

if (host->verid < DW_MMC_240A)
host->data_offset = DATA_OFFSET;
@@ -2064,12 +2064,12 @@ int dw_mci_probe(struct dw_mci *host)
DW_MCI_ERROR_FLAGS | SDMMC_INT_CD);
mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); /* Enable mci interrupt */

- dev_info(&host->dev, "DW MMC controller at irq %d, "
+ dev_info(host->dev, "DW MMC controller at irq %d, "
"%d bit host data width, "
"%u deep fifo\n",
host->irq, width, fifo_size);
if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO)
- dev_info(&host->dev, "Internal DMAC interrupt fix enabled.\n");
+ dev_info(host->dev, "Internal DMAC interrupt fix enabled.\n");

return 0;

@@ -2088,7 +2088,7 @@ err_workqueue:
err_dmaunmap:
if (host->use_dma && host->dma_ops->exit)
host->dma_ops->exit(host);
- dma_free_coherent(&host->dev, PAGE_SIZE,
+ dma_free_coherent(host->dev, PAGE_SIZE,
host->sg_cpu, host->sg_dma);

if (host->vmmc) {
@@ -2107,7 +2107,7 @@ void dw_mci_remove(struct dw_mci *host)
mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */

for (i = 0; i < host->num_slots; i++) {
- dev_dbg(&host->dev, "remove slot %d\n", i);
+ dev_dbg(host->dev, "remove slot %d\n", i);
if (host->slot[i])
dw_mci_cleanup_slot(host->slot[i], i);
}
@@ -2118,7 +2118,7 @@ void dw_mci_remove(struct dw_mci *host)

free_irq(host->irq, host);
destroy_workqueue(host->card_workqueue);
- dma_free_coherent(&host->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
+ dma_free_coherent(host->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);

if (host->use_dma && host->dma_ops->exit)
host->dma_ops->exit(host);
@@ -2173,7 +2173,7 @@ int dw_mci_resume(struct dw_mci *host)
if (host->dma_ops->init)
host->dma_ops->init(host);

- if (!mci_wait_reset(&host->dev, host)) {
+ if (!mci_wait_reset(host->dev, host)) {
ret = -ENODEV;
return ret;
}
diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h
index 7a7ebd3..a37a573 100644
--- a/include/linux/mmc/dw_mmc.h
+++ b/include/linux/mmc/dw_mmc.h
@@ -156,7 +156,7 @@ struct dw_mci {
u32 fifoth_val;
u16 verid;
u16 data_offset;
- struct device dev;
+ struct device *dev;
struct dw_mci_board *pdata;
struct dw_mci_slot *slot[MAX_MCI_SLOTS];

--
1.6.6.rc2


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