On Wed, Oct 21, 2020 at 01:01:07PM +0530, Deepak R Varma wrote:
Hello,
Requesting a review / ack of this patch.
Thank you,
Deepak.
> Reformat lines that exceed 100 column in length. Issue reported by
> checkpatch script.
>
> Signed-off-by: Deepak R Varma <mh12gx2825@xxxxxxxxx>
> ---
> Changes since v1:
> - No change in this patch.
> - Patch 2/2 has a change.
>
> drivers/staging/kpc2000/kpc_dma/dma.c | 27 +++++++++---
> drivers/staging/kpc2000/kpc_dma/fileops.c | 44 +++++++++++++++----
> .../staging/kpc2000/kpc_dma/kpc_dma_driver.c | 9 ++--
> 3 files changed, 63 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/staging/kpc2000/kpc_dma/dma.c b/drivers/staging/kpc2000/kpc_dma/dma.c
> index 452a3f7c835d..b8d8294aa4c3 100644
> --- a/drivers/staging/kpc2000/kpc_dma/dma.c
> +++ b/drivers/staging/kpc2000/kpc_dma/dma.c
> @@ -16,7 +16,8 @@ irqreturn_t ndd_irq_handler(int irq, void *dev_id)
> {
> struct kpc_dma_device *ldev = (struct kpc_dma_device *)dev_id;
>
> - if ((GetEngineControl(ldev) & ENG_CTL_IRQ_ACTIVE) || (ldev->desc_completed->MyDMAAddr != GetEngineCompletePtr(ldev)))
> + if ((GetEngineControl(ldev) & ENG_CTL_IRQ_ACTIVE) ||
> + (ldev->desc_completed->MyDMAAddr != GetEngineCompletePtr(ldev)))
> schedule_work(&ldev->irq_work);
>
> return IRQ_HANDLED;
> @@ -39,7 +40,9 @@ void ndd_irq_worker(struct work_struct *ws)
> cur = eng->desc_completed;
> do {
> cur = cur->Next;
> - dev_dbg(&eng->pldev->dev, "Handling completed descriptor %p (acd = %p)\n", cur, cur->acd);
> + dev_dbg(&eng->pldev->dev, "Handling completed descriptor %p (acd = %p)\n",
> + cur,
> + cur->acd);
> BUG_ON(cur == eng->desc_next); // Ordering failure.
>
> if (cur->DescControlFlags & DMA_DESC_CTL_SOP) {
> @@ -56,7 +59,9 @@ void ndd_irq_worker(struct work_struct *ws)
>
> if (cur->DescControlFlags & DMA_DESC_CTL_EOP) {
> if (cur->acd)
> - transfer_complete_cb(cur->acd, eng->accumulated_bytes, eng->accumulated_flags | ACD_FLAG_DONE);
> + transfer_complete_cb(cur->acd,
> + eng->accumulated_bytes,
> + eng->accumulated_flags | ACD_FLAG_DONE);
> }
>
> eng->desc_completed = cur;
> @@ -103,7 +108,10 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
> eng->dir = DMA_TO_DEVICE;
>
> eng->desc_pool_cnt = desc_cnt;
> - eng->desc_pool = dma_pool_create("KPC DMA Descriptors", &eng->pldev->dev, sizeof(struct kpc_dma_descriptor), DMA_DESC_ALIGNMENT, 4096);
> + eng->desc_pool = dma_pool_create("KPC DMA Descriptors",
> + &eng->pldev->dev,
> + sizeof(struct kpc_dma_descriptor),
> + DMA_DESC_ALIGNMENT, 4096);
>
> eng->desc_pool_first = dma_pool_alloc(eng->desc_pool, GFP_KERNEL | GFP_DMA, &head_handle);
> if (!eng->desc_pool_first) {
> @@ -141,7 +149,11 @@ int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt)
> INIT_WORK(&eng->irq_work, ndd_irq_worker);
>
> // Grab IRQ line
> - rv = request_irq(eng->irq, ndd_irq_handler, IRQF_SHARED, KP_DRIVER_NAME_DMA_CONTROLLER, eng);
> + rv = request_irq(eng->irq,
> + ndd_irq_handler,
> + IRQF_SHARED,
> + KP_DRIVER_NAME_DMA_CONTROLLER,
> + eng);
> if (rv) {
> dev_err(&eng->pldev->dev, "%s: failed to request_irq: %d\n", __func__, rv);
> return rv;
> @@ -195,7 +207,10 @@ void stop_dma_engine(struct kpc_dma_device *eng)
> }
>
> // Clear any persistent bits just to make sure there is no residue from the reset
> - SetClearEngineControl(eng, (ENG_CTL_IRQ_ACTIVE | ENG_CTL_DESC_COMPLETE | ENG_CTL_DESC_ALIGN_ERR | ENG_CTL_DESC_FETCH_ERR | ENG_CTL_SW_ABORT_ERR | ENG_CTL_DESC_CHAIN_END | ENG_CTL_DMA_WAITING_PERSIST), 0);
> + SetClearEngineControl(eng, (ENG_CTL_IRQ_ACTIVE | ENG_CTL_DESC_COMPLETE |
> + ENG_CTL_DESC_ALIGN_ERR | ENG_CTL_DESC_FETCH_ERR |
> + ENG_CTL_SW_ABORT_ERR | ENG_CTL_DESC_CHAIN_END |
> + ENG_CTL_DMA_WAITING_PERSIST), 0);
>
> // Reset performance counters
>
> diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
> index e1c7c04f16fe..b929987844ff 100644
> --- a/drivers/staging/kpc2000/kpc_dma/fileops.c
> +++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
> @@ -76,7 +76,11 @@ static int kpc_dma_transfer(struct dev_private_data *priv,
>
> // Lock the user buffer pages in memory, and hold on to the page pointers (for the sglist)
> mmap_read_lock(current->mm); /* get memory map semaphore */
> - rv = pin_user_pages(iov_base, acd->page_count, FOLL_TOUCH | FOLL_WRITE, acd->user_pages, NULL);
> + rv = pin_user_pages(iov_base,
> + acd->page_count,
> + FOLL_TOUCH | FOLL_WRITE,
> + acd->user_pages,
> + NULL);
> mmap_read_unlock(current->mm); /* release the semaphore */
> if (rv != acd->page_count) {
> nr_pages = rv;
> @@ -89,16 +93,25 @@ static int kpc_dma_transfer(struct dev_private_data *priv,
> nr_pages = acd->page_count;
>
> // Allocate and setup the sg_table (scatterlist entries)
> - rv = sg_alloc_table_from_pages(&acd->sgt, acd->user_pages, acd->page_count, iov_base & (PAGE_SIZE - 1), iov_len, GFP_KERNEL);
> + rv = sg_alloc_table_from_pages(&acd->sgt,
> + acd->user_pages,
> + acd->page_count,
> + iov_base & (PAGE_SIZE - 1),
> + iov_len, GFP_KERNEL);
> if (rv) {
> dev_err(&priv->ldev->pldev->dev, "Couldn't alloc sg_table (%d)\n", rv);
> goto unpin_pages;
> }
>
> // Setup the DMA mapping for all the sg entries
> - acd->mapped_entry_count = dma_map_sg(&ldev->pldev->dev, acd->sgt.sgl, acd->sgt.nents, ldev->dir);
> + acd->mapped_entry_count = dma_map_sg(&ldev->pldev->dev,
> + acd->sgt.sgl,
> + acd->sgt.nents,
> + ldev->dir);
> if (acd->mapped_entry_count <= 0) {
> - dev_err(&priv->ldev->pldev->dev, "Couldn't dma_map_sg (%d)\n", acd->mapped_entry_count);
> + dev_err(&priv->ldev->pldev->dev,
> + "Couldn't dma_map_sg (%d)\n",
> + acd->mapped_entry_count);
> goto free_table;
> }
>
> @@ -111,14 +124,26 @@ static int kpc_dma_transfer(struct dev_private_data *priv,
>
> // Figoure out how many descriptors are available and return an error if there aren't enough
> num_descrs_avail = count_descriptors_available(ldev);
> - dev_dbg(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
> + dev_dbg(&priv->ldev->pldev->dev,
> + " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d\n",
> + acd->mapped_entry_count,
> + desc_needed,
> + num_descrs_avail);
> if (desc_needed >= ldev->desc_pool_cnt) {
> - dev_warn(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d TOO MANY to ever complete!\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
> + dev_warn(&priv->ldev->pldev->dev,
> + " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d TOO MANY to ever complete!\n",
> + acd->mapped_entry_count,
> + desc_needed,
> + num_descrs_avail);
> rv = -EAGAIN;
> goto err_descr_too_many;
> }
> if (desc_needed > num_descrs_avail) {
> - dev_warn(&priv->ldev->pldev->dev, " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d Too many to complete right now.\n", acd->mapped_entry_count, desc_needed, num_descrs_avail);
> + dev_warn(&priv->ldev->pldev->dev,
> + " mapped_entry_count = %d num_descrs_needed = %d num_descrs_avail = %d Too many to complete right now.\n",
> + acd->mapped_entry_count,
> + desc_needed,
> + num_descrs_avail);
> rv = -EMSGSIZE;
> goto err_descr_too_many;
> }
> @@ -163,7 +188,10 @@ static int kpc_dma_transfer(struct dev_private_data *priv,
> if (i == acd->mapped_entry_count - 1 && p == pcnt - 1)
> desc->acd = acd;
>
> - dev_dbg(&priv->ldev->pldev->dev, " Filled descriptor %p (acd = %p)\n", desc, desc->acd);
> + dev_dbg(&priv->ldev->pldev->dev,
> + " Filled descriptor %p (acd = %p)\n",
> + desc,
> + desc->acd);
>
> ldev->desc_next = desc->Next;
> desc = desc->Next;
> diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
> index 624d47bae4d1..7698e5ef2a7c 100644
> --- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
> +++ b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c
> @@ -138,7 +138,8 @@ int kpc_dma_probe(struct platform_device *pldev)
>
> // Setup miscdev struct
> dev = MKDEV(assigned_major_num, pldev->id);
> - ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev, dev, ldev, "kpc_dma%d", pldev->id);
> + ldev->kpc_dma_dev = device_create(kpc_dma_class, &pldev->dev,
> + dev, ldev, "kpc_dma%d", pldev->id);
> if (IS_ERR(ldev->kpc_dma_dev)) {
> rv = PTR_ERR(ldev->kpc_dma_dev);
> dev_err(&ldev->pldev->dev, "%s: device_create failed: %d\n", __func__, rv);
> @@ -205,9 +206,11 @@ int __init kpc_dma_driver_init(void)
> {
> int err;
>
> - err = __register_chrdev(KPC_DMA_CHAR_MAJOR, 0, KPC_DMA_NUM_MINORS, "kpc_dma", &kpc_dma_fops);
> + err = __register_chrdev(KPC_DMA_CHAR_MAJOR, 0,
> + KPC_DMA_NUM_MINORS, "kpc_dma", &kpc_dma_fops);
> if (err < 0) {
> - pr_err("Can't allocate a major number (%d) for kpc_dma (err = %d)\n", KPC_DMA_CHAR_MAJOR, err);
> + pr_err("Can't allocate a major number (%d) for kpc_dma (err = %d)\n",
> + KPC_DMA_CHAR_MAJOR, err);
> goto fail_chrdev_register;
> }
> assigned_major_num = err;
> --
> 2.25.1
>
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