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Date: Fri, 18 May 2012 11:24:07 +0900
From: Jaehoon Chung <jh80.chung@...sung.com>
To: Thomas Abraham <thomas.abraham@...aro.org>
Cc: linux-mmc@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
cjb@...top.org, grant.likely@...retlab.ca, rob.herring@...xeda.com,
linux-samsung-soc@...r.kernel.org, kgene.kim@...sung.com,
patches@...aro.org
Subject: Re: [PATCH v2 1/6] mmc: dw_mmc: convert copy of struct device in
struct dw_mci to a reference
Hi Thomas,
I think that also need to consider for using dw_mci-pci.c.
Best Regards,
Jaehoon chung
On 05/18/2012 12:10 AM, Thomas Abraham wrote:
> 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@...aro.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];
>
--
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