XDMA: fix code format/style warnings

XDMA/linux-kernel/libxdma/libxdma.h

@@ -58,7 +58,7 @@
  * .REG_IRQ_OUT	(reg_irq_from_ch[(channel*2) +: 2]),
  */
 #define XDMA_ENG_IRQ_NUM	(1)
-#define MAX_EXTRA_ADJ	0x3F 
+#define MAX_EXTRA_ADJ		(0x3F)
 #define RX_STATUS_EOP		(1)
 
 /* Target internal components on XDMA control BAR */
@@ -410,12 +410,12 @@ struct sw_desc {
 struct xdma_transfer {
 	struct list_head entry;		/* queue of non-completed transfers */
 	struct xdma_desc *desc_virt;	/* virt addr of the 1st descriptor */
-	struct xdma_result *res_virt; /* virt addr of result for c2h streaming */
+	struct xdma_result *res_virt;   /* virt addr of result, c2h streaming */
 	dma_addr_t res_bus;		/* bus addr for result descriptors */
 	dma_addr_t desc_bus;		/* bus addr of the first descriptor */
 	int desc_adjacent;		/* adjacent descriptors at desc_bus */
 	int desc_num;			/* number of descriptors in transfer */
-	int desc_index;			/* index for first descriptor in transfer */
+	int desc_index;			/* index for 1st desc. in transfer */
 	enum dma_data_direction dir;
 #if	KERNEL_VERSION(4, 6, 0) <= LINUX_VERSION_CODE
 	struct swait_queue_head wq;
@@ -438,7 +438,9 @@ struct xdma_request_cb {
 	unsigned int total_len;
 	u64 ep_addr;
 
-	struct xdma_transfer tfer[2]; /* Use two transfers in case single request needs to be split */
+	/* Use two transfers in case single request needs to be split */
+	struct xdma_transfer tfer[2];
+
 	struct xdma_io_cb *cb;
 
 	unsigned int sw_desc_idx;
@@ -486,6 +488,7 @@ struct xdma_engine {
 	struct sg_table cyclic_sgt;
 	u8 *perf_buf_virt;
 	dma_addr_t perf_buf_bus; /* bus address */
+
 	u8 eop_found; /* used only for cyclic(rx:c2h) */
 	int eop_count;
 	int rx_tail;	/* follows the HW */

XDMA/linux-kernel/xdma/cdev_ctrl.c

@@ -25,9 +25,9 @@
 #include "cdev_ctrl.h"
 
 #if KERNEL_VERSION(5, 0, 0) <= LINUX_VERSION_CODE
-#define xlx_access_ok(X,Y,Z) access_ok(Y,Z)
+#define xlx_access_ok(X, Y, Z) access_ok(Y, Z)
 #else
-#define xlx_access_ok(X,Y,Z) access_ok(X,Y,Z)
+#define xlx_access_ok(X, Y, Z) access_ok(X, Y, Z)
 #endif
 
 /*

XDMA/linux-kernel/xdma/cdev_sgdma.c

@@ -57,13 +57,12 @@ static void async_io_handler(unsigned long  cb_hndl, int err)
 	int lock_stat;
 	int rv;
 
-	if (NULL == caio) {
+	if (caio == NULL) {
 		pr_err("Invalid work struct\n");
 		return;
 	}
 
 	xcdev = (struct xdma_cdev *)caio->iocb->ki_filp->private_data;
-
 	rv = xcdev_check(__func__, xcdev, 1);
 	if (rv < 0)
 		return;
@@ -80,13 +79,13 @@ static void async_io_handler(unsigned long  cb_hndl, int err)
 		goto skip_tran;
 	}
 
-
 	engine = xcdev->engine;
 	xdev = xcdev->xdev;
 
 	if (!err)
-		numbytes = xdma_xfer_completion((void *)cb, xdev, engine->channel, cb->write, cb->ep_addr, &cb->sgt,
-				0, sgdma_timeout * 1000);
+		numbytes = xdma_xfer_completion((void *)cb, xdev,
+				engine->channel, cb->write, cb->ep_addr,
+				&cb->sgt, 0, sgdma_timeout * 1000);
 
 	char_sgdma_unmap_user_buf(cb, cb->write);
 
@@ -97,9 +96,7 @@ static void async_io_handler(unsigned long  cb_hndl, int err)
 	caio->cmpl_cnt++;
 	caio->res += numbytes;
 
-
-	if (caio->cmpl_cnt == caio->req_cnt)
-	{
+	if (caio->cmpl_cnt == caio->req_cnt) {
 		res = caio->res;
 		res2 = caio->res2;
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0)
@@ -113,12 +110,9 @@ skip_tran:
 		kfree(cb);
 		return;
 	} 
-	else
-	{
 	spin_unlock(&caio->lock);
 	return;
 
-	}
 skip_dev_lock:
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0)
 	caio->iocb->ki_complete(caio->iocb, numbytes, -EBUSY);
@@ -416,7 +410,8 @@ static ssize_t char_sgdma_read(struct file *file, char __user *buf,
 static ssize_t cdev_aio_write(struct kiocb *iocb, const struct iovec *io,
 				unsigned long count, loff_t pos)
 {
-	struct xdma_cdev *xcdev = (struct xdma_cdev *)iocb->ki_filp->private_data;
+	struct xdma_cdev *xcdev = (struct xdma_cdev *)
+					iocb->ki_filp->private_data;
 	struct cdev_async_io *caio;
 	struct xdma_engine *engine;
 	struct xdma_dev *xdev;
@@ -460,7 +455,8 @@ static ssize_t cdev_aio_write(struct kiocb *iocb, const struct iovec *io,
 		caio->cb[i].write = true;
 		caio->cb[i].private = caio;
 		caio->cb[i].io_done = async_io_handler;
-		rv = check_transfer_align(engine, caio->cb[i].buf, caio->cb[i].len, pos, 1);
+		rv = check_transfer_align(engine, caio->cb[i].buf,
+					caio->cb[i].len, pos, 1);
 		if (rv) {
 			pr_info("Invalid transfer alignment detected\n");
 			kmem_cache_free(cdev_cache, caio);
@@ -468,11 +464,12 @@ static ssize_t cdev_aio_write(struct kiocb *iocb, const struct iovec *io,
 		}
 
 		rv = char_sgdma_map_user_buf_to_sgl(&caio->cb[i], true);
-		if (rv < 0) {
+		if (rv < 0)
 			return rv;
-		}
 
-		rv = xdma_xfer_submit_nowait((void *)&caio->cb[i], xdev, engine->channel, caio->cb[i].write, caio->cb[i].ep_addr, &caio->cb[i].sgt,
+		rv = xdma_xfer_submit_nowait((void *)&caio->cb[i], xdev,
+					engine->channel, caio->cb[i].write,
+					caio->cb[i].ep_addr, &caio->cb[i].sgt,
 					0, sgdma_timeout * 1000);
 	}
 
@@ -487,7 +484,8 @@ static ssize_t cdev_aio_read(struct kiocb *iocb, const struct iovec *io,
 				unsigned long count, loff_t pos)
 {
 
-	struct xdma_cdev *xcdev = (struct xdma_cdev *)iocb->ki_filp->private_data;
+	struct xdma_cdev *xcdev = (struct xdma_cdev *)
+					iocb->ki_filp->private_data;
 	struct cdev_async_io *caio;
 	struct xdma_engine *engine;
 	struct xdma_dev *xdev;
@@ -532,7 +530,8 @@ static ssize_t cdev_aio_read(struct kiocb *iocb, const struct iovec *io,
 		caio->cb[i].private = caio;
 		caio->cb[i].io_done = async_io_handler;
 
-		rv = check_transfer_align(engine, caio->cb[i].buf, caio->cb[i].len, pos, 1);
+		rv = check_transfer_align(engine, caio->cb[i].buf,
+					caio->cb[i].len, pos, 1);
 		if (rv) {
 			pr_info("Invalid transfer alignment detected\n");
 			kmem_cache_free(cdev_cache, caio);
@@ -540,11 +539,12 @@ static ssize_t cdev_aio_read(struct kiocb *iocb, const struct iovec *io,
 		}
 
 		rv = char_sgdma_map_user_buf_to_sgl(&caio->cb[i], true);
-		if (rv < 0) {
+		if (rv < 0)
 			return rv;
-		}
 
-		rv = xdma_xfer_submit_nowait((void *)&caio->cb[i], xdev, engine->channel, caio->cb[i].write, caio->cb[i].ep_addr, &caio->cb[i].sgt,
+		rv = xdma_xfer_submit_nowait((void *)&caio->cb[i], xdev,
+					engine->channel, caio->cb[i].write,
+					caio->cb[i].ep_addr, &caio->cb[i].sgt,
 					0, sgdma_timeout * 1000);
 	}
 

XDMA/linux-kernel/xdma/cdev_xvc.c

@@ -136,7 +136,7 @@ static long xvc_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	total_bits = xvc_obj.length;
 	total_bytes = (total_bits + 7) >> 3;
 
-	buffer = (unsigned char *)kmalloc(total_bytes * 3, GFP_KERNEL);
+	buffer = kmalloc(total_bytes * 3, GFP_KERNEL);
 	if (!buffer) {
 		pr_info("OOM %u, op 0x%x, len %u bits, %u bytes.\n",
 			3 * total_bytes, opcode, total_bits, total_bytes);

XDMA/linux-kernel/xdma/xdma_cdev.c

@@ -607,21 +607,20 @@ int xdma_cdev_init(void)
 	g_xdma_class = class_create(THIS_MODULE, XDMA_NODE_NAME);
 	if (IS_ERR(g_xdma_class)) {
 		dbg_init(XDMA_NODE_NAME ": failed to create class");
-		return -1;
+		return -EINVAL;
 	}
 
 	/* using kmem_cache_create to enable sequential cleanup */
 	cdev_cache = kmem_cache_create("cdev_cache",
-                                   sizeof(struct cdev_async_io),
-                                   0,
-                                   SLAB_HWCACHE_ALIGN,
-                                   NULL);
+					sizeof(struct cdev_async_io), 0,
+					SLAB_HWCACHE_ALIGN, NULL);
+
 	if (!cdev_cache) {
 		pr_info("memory allocation for cdev_cache failed. OOM\n");
 		return -ENOMEM;
 	}
 
-   	xdma_threads_create(8);
+	xdma_threads_create(num_online_cpus());
 
 	return 0;
 }

XDMA/linux-kernel/xdma/xdma_mod.c

@@ -32,7 +32,6 @@
 
 #define DRV_MODULE_NAME		"xdma"
 #define DRV_MODULE_DESC		"Xilinx XDMA Reference Driver"
-#define DRV_MODULE_RELDATE	"Feb. 2018"
 
 static char version[] =
 	DRV_MODULE_DESC " " DRV_MODULE_NAME " v" DRV_MODULE_VERSION "\n";

XDMA/linux-kernel/xdma/xdma_mod.h

@@ -101,7 +101,7 @@ struct xdma_pci_dev {
 
 struct cdev_async_io {
 	struct kiocb *iocb;
-	struct xdma_io_cb* cb;
+	struct xdma_io_cb *cb;
 	bool write;
 	bool cancel;
 	int cmpl_cnt;