These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

5 files changed, 132 insertions, 129 deletions

diff --git a/kernel/drivers/net/ethernet/smsc/Kconfig b/kernel/drivers/net/ethernet/smsc/Kconfig
index 3e97a8b43..eb9230e20 100644
--- a/kernel/drivers/net/ethernet/smsc/Kconfig
+++ b/kernel/drivers/net/ethernet/smsc/Kconfig
@@ -9,9 +9,7 @@ config NET_VENDOR_SMSC
 		   ISA || M32R || MAC || MIPS || MN10300 || NIOS2 || PCI || \
 		   PCMCIA || SUPERH || XTENSA
 	---help---
-	  If you have a network (Ethernet) card belonging to this class, say Y
-	  and read the Ethernet-HOWTO, available from
-	  <http://www.tldp.org/docs.html#howto>.
+	  If you have a network (Ethernet) card belonging to this class, say Y.
 
 	  Note that the answer to this question doesn't directly affect the
 	  kernel: saying N will just cause the configurator to skip all
@@ -29,8 +27,7 @@ config SMC9194
 	  option if you have a DELL laptop with the docking station, or
 	  another SMC9192/9194 based chipset.  Say Y if you want it compiled
 	  into the kernel, and read the file
-	  <file:Documentation/networking/smc9.txt> and the Ethernet-HOWTO,
-	  available from <http://www.tldp.org/docs.html#howto>.
+	  <file:Documentation/networking/smc9.txt>.
 
 	  To compile this driver as a module, choose M here. The module
 	  will be called smc9194.
@@ -46,8 +43,7 @@ config SMC91X
 	  This is a driver for SMC's 91x series of Ethernet chipsets,
 	  including the SMC91C94 and the SMC91C111. Say Y if you want it
 	  compiled into the kernel, and read the file
-	  <file:Documentation/networking/smc9.txt>  and the Ethernet-HOWTO,
-	  available from  <http://www.tldp.org/docs.html#howto>.
+	  <file:Documentation/networking/smc9.txt>.
 
 	  This driver is also available as a module ( = code which can be
 	  inserted in and removed from the running kernel whenever you want).
@@ -85,9 +81,7 @@ config SMC911X
 	---help---
 	  This is a driver for SMSC's LAN911x series of Ethernet chipsets
 	  including the new LAN9115, LAN9116, LAN9117, and LAN9118.
-	  Say Y if you want it compiled into the kernel,
-	  and read the Ethernet-HOWTO, available from
-	  <http://www.tldp.org/docs.html#howto>.
+	  Say Y here if you want it compiled into the kernel.
 
 	  This driver is also available as a module. The module will be
 	  called smc911x.  If you want to compile it as a module, say M
@@ -122,9 +116,7 @@ config SMSC9420
 	select SMSC_PHY
 	---help---
 	  This is a driver for SMSC's LAN9420 PCI ethernet adapter.
-	  Say Y if you want it compiled into the kernel,
-	  and read the Ethernet-HOWTO, available from
-	  <http://www.tldp.org/docs.html#howto>.
+	  Say Y here if you want it compiled into the kernel.
 
 	  This driver is also available as a module. The module will be
 	  called smsc9420.  If you want to compile it as a module, say M
diff --git a/kernel/drivers/net/ethernet/smsc/smc9194.c b/kernel/drivers/net/ethernet/smsc/smc9194.c
index 67d9fdeed..664f59697 100644
--- a/kernel/drivers/net/ethernet/smsc/smc9194.c
+++ b/kernel/drivers/net/ethernet/smsc/smc9194.c
@@ -1031,36 +1031,8 @@ err_out:
 static void print_packet( byte * buf, int length )
 {
 #if 0
-	int i;
-	int remainder;
-	int lines;
-
-	pr_dbg("Packet of length %d\n", length);
-	lines = length / 16;
-	remainder = length % 16;
-
-	for ( i = 0; i < lines ; i ++ ) {
-		int cur;
-
-		printk(KERN_DEBUG);
-		for ( cur = 0; cur < 8; cur ++ ) {
-			byte a, b;
-
-			a = *(buf ++ );
-			b = *(buf ++ );
-			pr_cont("%02x%02x ", a, b);
-		}
-		pr_cont("\n");
-	}
-	printk(KERN_DEBUG);
-	for ( i = 0; i < remainder/2 ; i++ ) {
-		byte a, b;
-
-		a = *(buf ++ );
-		b = *(buf ++ );
-		pr_cont("%02x%02x ", a, b);
-	}
-	pr_cont("\n");
+	print_hex_dump_debug(DRV_NAME, DUMP_PREFIX_OFFSET, 16, 1,
+			     buf, length, true);
 #endif
 }
 #endif
diff --git a/kernel/drivers/net/ethernet/smsc/smc91x.c b/kernel/drivers/net/ethernet/smsc/smc91x.c
index 630f0b780..0e2fc1a84 100644
--- a/kernel/drivers/net/ethernet/smsc/smc91x.c
+++ b/kernel/drivers/net/ethernet/smsc/smc91x.c
@@ -2018,10 +2018,18 @@ static int smc_probe(struct net_device *dev, void __iomem *ioaddr,
 	lp->cfg.flags |= SMC91X_USE_DMA;
 #  endif
 	if (lp->cfg.flags & SMC91X_USE_DMA) {
-		int dma = pxa_request_dma(dev->name, DMA_PRIO_LOW,
-					  smc_pxa_dma_irq, NULL);
-		if (dma >= 0)
-			dev->dma = dma;
+		dma_cap_mask_t mask;
+		struct pxad_param param;
+
+		dma_cap_zero(mask);
+		dma_cap_set(DMA_SLAVE, mask);
+		param.prio = PXAD_PRIO_LOWEST;
+		param.drcmr = -1UL;
+
+		lp->dma_chan =
+			dma_request_slave_channel_compat(mask, pxad_filter_fn,
+							 &param, &dev->dev,
+							 "data");
 	}
 #endif
 
@@ -2032,8 +2040,8 @@ static int smc_probe(struct net_device *dev, void __iomem *ioaddr,
 			    version_string, revision_register & 0x0f,
 			    lp->base, dev->irq);
 
-		if (dev->dma != (unsigned char)-1)
-			pr_cont(" DMA %d", dev->dma);
+		if (lp->dma_chan)
+			pr_cont(" DMA %p", lp->dma_chan);
 
 		pr_cont("%s%s\n",
 			lp->cfg.flags & SMC91X_NOWAIT ? " [nowait]" : "",
@@ -2058,8 +2066,8 @@ static int smc_probe(struct net_device *dev, void __iomem *ioaddr,
 
 err_out:
 #ifdef CONFIG_ARCH_PXA
-	if (retval && dev->dma != (unsigned char)-1)
-		pxa_free_dma(dev->dma);
+	if (retval && lp->dma_chan)
+		dma_release_channel(lp->dma_chan);
 #endif
 	return retval;
 }
@@ -2370,6 +2378,7 @@ static int smc_drv_probe(struct platform_device *pdev)
 		struct smc_local *lp = netdev_priv(ndev);
 		lp->device = &pdev->dev;
 		lp->physaddr = res->start;
+
 	}
 #endif
 
@@ -2406,8 +2415,8 @@ static int smc_drv_remove(struct platform_device *pdev)
 	free_irq(ndev->irq, ndev);
 
 #ifdef CONFIG_ARCH_PXA
-	if (ndev->dma != (unsigned char)-1)
-		pxa_free_dma(ndev->dma);
+	if (lp->dma_chan)
+		dma_release_channel(lp->dma_chan);
 #endif
 	iounmap(lp->base);
 
diff --git a/kernel/drivers/net/ethernet/smsc/smc91x.h b/kernel/drivers/net/ethernet/smsc/smc91x.h
index 3a18501d1..a3c129e1e 100644
--- a/kernel/drivers/net/ethernet/smsc/smc91x.h
+++ b/kernel/drivers/net/ethernet/smsc/smc91x.h
@@ -33,6 +33,7 @@
 #ifndef _SMC91X_H_
 #define _SMC91X_H_
 
+#include <linux/dmaengine.h>
 #include <linux/smc91x.h>
 
 /*
@@ -244,6 +245,7 @@ struct smc_local {
 	u_long physaddr;
 	struct device *device;
 #endif
+	struct dma_chan *dma_chan;
 	void __iomem *base;
 	void __iomem *datacs;
 
@@ -265,21 +267,47 @@ struct smc_local {
  * as RX which can overrun memory and lose packets.
  */
 #include <linux/dma-mapping.h>
-#include <mach/dma.h>
+#include <linux/dma/pxa-dma.h>
 
 #ifdef SMC_insl
 #undef SMC_insl
 #define SMC_insl(a, r, p, l) \
 	smc_pxa_dma_insl(a, lp, r, dev->dma, p, l)
 static inline void
+smc_pxa_dma_inpump(struct smc_local *lp, u_char *buf, int len)
+{
+	dma_addr_t dmabuf;
+	struct dma_async_tx_descriptor *tx;
+	dma_cookie_t cookie;
+	enum dma_status status;
+	struct dma_tx_state state;
+
+	dmabuf = dma_map_single(lp->device, buf, len, DMA_FROM_DEVICE);
+	tx = dmaengine_prep_slave_single(lp->dma_chan, dmabuf, len,
+					 DMA_DEV_TO_MEM, 0);
+	if (tx) {
+		cookie = dmaengine_submit(tx);
+		dma_async_issue_pending(lp->dma_chan);
+		do {
+			status = dmaengine_tx_status(lp->dma_chan, cookie,
+						     &state);
+			cpu_relax();
+		} while (status != DMA_COMPLETE && status != DMA_ERROR &&
+			 state.residue);
+		dmaengine_terminate_all(lp->dma_chan);
+	}
+	dma_unmap_single(lp->device, dmabuf, len, DMA_FROM_DEVICE);
+}
+
+static inline void
 smc_pxa_dma_insl(void __iomem *ioaddr, struct smc_local *lp, int reg, int dma,
 		 u_char *buf, int len)
 {
-	u_long physaddr = lp->physaddr;
-	dma_addr_t dmabuf;
+	struct dma_slave_config	config;
+	int ret;
 
 	/* fallback if no DMA available */
-	if (dma == (unsigned char)-1) {
+	if (!lp->dma_chan) {
 		readsl(ioaddr + reg, buf, len);
 		return;
 	}
@@ -291,18 +319,22 @@ smc_pxa_dma_insl(void __iomem *ioaddr, struct smc_local *lp, int reg, int dma,
 		len--;
 	}
 
+	memset(&config, 0, sizeof(config));
+	config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	config.src_addr = lp->physaddr + reg;
+	config.dst_addr = lp->physaddr + reg;
+	config.src_maxburst = 32;
+	config.dst_maxburst = 32;
+	ret = dmaengine_slave_config(lp->dma_chan, &config);
+	if (ret) {
+		dev_err(lp->device, "dma channel configuration failed: %d\n",
+			ret);
+		return;
+	}
+
 	len *= 4;
-	dmabuf = dma_map_single(lp->device, buf, len, DMA_FROM_DEVICE);
-	DCSR(dma) = DCSR_NODESC;
-	DTADR(dma) = dmabuf;
-	DSADR(dma) = physaddr + reg;
-	DCMD(dma) = (DCMD_INCTRGADDR | DCMD_BURST32 |
-		     DCMD_WIDTH4 | (DCMD_LENGTH & len));
-	DCSR(dma) = DCSR_NODESC | DCSR_RUN;
-	while (!(DCSR(dma) & DCSR_STOPSTATE))
-		cpu_relax();
-	DCSR(dma) = 0;
-	dma_unmap_single(lp->device, dmabuf, len, DMA_FROM_DEVICE);
+	smc_pxa_dma_inpump(lp, buf, len);
 }
 #endif
 
@@ -314,11 +346,11 @@ static inline void
 smc_pxa_dma_insw(void __iomem *ioaddr, struct smc_local *lp, int reg, int dma,
 		 u_char *buf, int len)
 {
-	u_long physaddr = lp->physaddr;
-	dma_addr_t dmabuf;
+	struct dma_slave_config	config;
+	int ret;
 
 	/* fallback if no DMA available */
-	if (dma == (unsigned char)-1) {
+	if (!lp->dma_chan) {
 		readsw(ioaddr + reg, buf, len);
 		return;
 	}
@@ -330,26 +362,25 @@ smc_pxa_dma_insw(void __iomem *ioaddr, struct smc_local *lp, int reg, int dma,
 		len--;
 	}
 
+	memset(&config, 0, sizeof(config));
+	config.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+	config.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+	config.src_addr = lp->physaddr + reg;
+	config.dst_addr = lp->physaddr + reg;
+	config.src_maxburst = 32;
+	config.dst_maxburst = 32;
+	ret = dmaengine_slave_config(lp->dma_chan, &config);
+	if (ret) {
+		dev_err(lp->device, "dma channel configuration failed: %d\n",
+			ret);
+		return;
+	}
+
 	len *= 2;
-	dmabuf = dma_map_single(lp->device, buf, len, DMA_FROM_DEVICE);
-	DCSR(dma) = DCSR_NODESC;
-	DTADR(dma) = dmabuf;
-	DSADR(dma) = physaddr + reg;
-	DCMD(dma) = (DCMD_INCTRGADDR | DCMD_BURST32 |
-		     DCMD_WIDTH2 | (DCMD_LENGTH & len));
-	DCSR(dma) = DCSR_NODESC | DCSR_RUN;
-	while (!(DCSR(dma) & DCSR_STOPSTATE))
-		cpu_relax();
-	DCSR(dma) = 0;
-	dma_unmap_single(lp->device, dmabuf, len, DMA_FROM_DEVICE);
+	smc_pxa_dma_inpump(lp, buf, len);
 }
 #endif
 
-static void
-smc_pxa_dma_irq(int dma, void *dummy)
-{
-	DCSR(dma) = 0;
-}
 #endif  /* CONFIG_ARCH_PXA */
 
 
diff --git a/kernel/drivers/net/ethernet/smsc/smsc911x.c b/kernel/drivers/net/ethernet/smsc/smsc911x.c
index 959aeeade..219a99b7a 100644
--- a/kernel/drivers/net/ethernet/smsc/smsc911x.c
+++ b/kernel/drivers/net/ethernet/smsc/smsc911x.c
@@ -59,7 +59,9 @@
 #include <linux/of_device.h>
 #include <linux/of_gpio.h>
 #include <linux/of_net.h>
+#include <linux/acpi.h>
 #include <linux/pm_runtime.h>
+#include <linux/property.h>
 
 #include "smsc911x.h"
 
@@ -807,22 +809,17 @@ static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
 
 static int smsc911x_phy_reset(struct smsc911x_data *pdata)
 {
-	struct phy_device *phy_dev = pdata->phy_dev;
 	unsigned int temp;
 	unsigned int i = 100000;
 
-	BUG_ON(!phy_dev);
-	BUG_ON(!phy_dev->bus);
-
-	SMSC_TRACE(pdata, hw, "Performing PHY BCR Reset");
-	smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, BMCR_RESET);
+	temp = smsc911x_reg_read(pdata, PMT_CTRL);
+	smsc911x_reg_write(pdata, PMT_CTRL, temp | PMT_CTRL_PHY_RST_);
 	do {
 		msleep(1);
-		temp = smsc911x_mii_read(phy_dev->bus, phy_dev->addr,
-			MII_BMCR);
-	} while ((i--) && (temp & BMCR_RESET));
+		temp = smsc911x_reg_read(pdata, PMT_CTRL);
+	} while ((i--) && (temp & PMT_CTRL_PHY_RST_));
 
-	if (temp & BMCR_RESET) {
+	if (unlikely(temp & PMT_CTRL_PHY_RST_)) {
 		SMSC_WARN(pdata, hw, "PHY reset failed to complete");
 		return -EIO;
 	}
@@ -1050,6 +1047,7 @@ static int smsc911x_mii_probe(struct net_device *dev)
 #ifdef USE_PHY_WORK_AROUND
 	if (smsc911x_phy_loopbacktest(dev) < 0) {
 		SMSC_WARN(pdata, hw, "Failed Loop Back Test");
+		phy_disconnect(phydev);
 		return -ENODEV;
 	}
 	SMSC_TRACE(pdata, hw, "Passed Loop Back Test");
@@ -2293,7 +2291,7 @@ static int smsc911x_init(struct net_device *dev)
 	}
 
 	/* Reset the LAN911x */
-	if (smsc911x_soft_reset(pdata))
+	if (smsc911x_phy_reset(pdata) || smsc911x_soft_reset(pdata))
 		return -ENODEV;
 
 	dev->flags |= IFF_MULTICAST;
@@ -2362,59 +2360,50 @@ static const struct smsc911x_ops shifted_smsc911x_ops = {
 	.tx_writefifo = smsc911x_tx_writefifo_shift,
 };
 
-#ifdef CONFIG_OF
-static int smsc911x_probe_config_dt(struct smsc911x_platform_config *config,
-				    struct device_node *np)
+static int smsc911x_probe_config(struct smsc911x_platform_config *config,
+				 struct device *dev)
 {
-	const char *mac;
+	int phy_interface;
 	u32 width = 0;
+	int err;
 
-	if (!np)
-		return -ENODEV;
+	phy_interface = device_get_phy_mode(dev);
+	if (phy_interface < 0)
+		phy_interface = PHY_INTERFACE_MODE_NA;
+	config->phy_interface = phy_interface;
 
-	config->phy_interface = of_get_phy_mode(np);
+	device_get_mac_address(dev, config->mac, ETH_ALEN);
 
-	mac = of_get_mac_address(np);
-	if (mac)
-		memcpy(config->mac, mac, ETH_ALEN);
-
-	of_property_read_u32(np, "reg-shift", &config->shift);
-
-	of_property_read_u32(np, "reg-io-width", &width);
-	if (width == 4)
+	err = device_property_read_u32(dev, "reg-io-width", &width);
+	if (err == -ENXIO)
+		return err;
+	if (!err && width == 4)
 		config->flags |= SMSC911X_USE_32BIT;
 	else
 		config->flags |= SMSC911X_USE_16BIT;
 
-	if (of_get_property(np, "smsc,irq-active-high", NULL))
+	device_property_read_u32(dev, "reg-shift", &config->shift);
+
+	if (device_property_present(dev, "smsc,irq-active-high"))
 		config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH;
 
-	if (of_get_property(np, "smsc,irq-push-pull", NULL))
+	if (device_property_present(dev, "smsc,irq-push-pull"))
 		config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL;
 
-	if (of_get_property(np, "smsc,force-internal-phy", NULL))
+	if (device_property_present(dev, "smsc,force-internal-phy"))
 		config->flags |= SMSC911X_FORCE_INTERNAL_PHY;
 
-	if (of_get_property(np, "smsc,force-external-phy", NULL))
+	if (device_property_present(dev, "smsc,force-external-phy"))
 		config->flags |= SMSC911X_FORCE_EXTERNAL_PHY;
 
-	if (of_get_property(np, "smsc,save-mac-address", NULL))
+	if (device_property_present(dev, "smsc,save-mac-address"))
 		config->flags |= SMSC911X_SAVE_MAC_ADDRESS;
 
 	return 0;
 }
-#else
-static inline int smsc911x_probe_config_dt(
-				struct smsc911x_platform_config *config,
-				struct device_node *np)
-{
-	return -ENODEV;
-}
-#endif /* CONFIG_OF */
 
 static int smsc911x_drv_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
 	struct net_device *dev;
 	struct smsc911x_data *pdata;
 	struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev);
@@ -2435,7 +2424,10 @@ static int smsc911x_drv_probe(struct platform_device *pdev)
 	res_size = resource_size(res);
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq <= 0) {
+	if (irq == -EPROBE_DEFER) {
+		retval = -EPROBE_DEFER;
+		goto out_0;
+	} else if (irq <= 0) {
 		pr_warn("Could not allocate irq resource\n");
 		retval = -ENODEV;
 		goto out_0;
@@ -2478,7 +2470,7 @@ static int smsc911x_drv_probe(struct platform_device *pdev)
 		goto out_disable_resources;
 	}
 
-	retval = smsc911x_probe_config_dt(&pdata->config, np);
+	retval = smsc911x_probe_config(&pdata->config, &pdev->dev);
 	if (retval && config) {
 		/* copy config parameters across to pdata */
 		memcpy(&pdata->config, config, sizeof(pdata->config));
@@ -2654,6 +2646,12 @@ static const struct of_device_id smsc911x_dt_ids[] = {
 MODULE_DEVICE_TABLE(of, smsc911x_dt_ids);
 #endif
 
+static const struct acpi_device_id smsc911x_acpi_match[] = {
+	{ "ARMH9118", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, smsc911x_acpi_match);
+
 static struct platform_driver smsc911x_driver = {
 	.probe = smsc911x_drv_probe,
 	.remove = smsc911x_drv_remove,
@@ -2661,6 +2659,7 @@ static struct platform_driver smsc911x_driver = {
 		.name	= SMSC_CHIPNAME,
 		.pm	= SMSC911X_PM_OPS,
 		.of_match_table = of_match_ptr(smsc911x_dt_ids),
+		.acpi_match_table = ACPI_PTR(smsc911x_acpi_match),
 	},
 };