From: Al Viro <viro@www.linux.org.uk>
Date: Wed, 4 May 2005 04:39:32 +0000 (+0100)
Subject: [PATCH] ISA_DMA Kconfig fixes - part 2 (parport_pc)
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7fbacd5213a03b262bb17a826b166900e8b168ac;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[PATCH] ISA_DMA Kconfig fixes - part 2 (parport_pc)

Part of parport_pc that uses ISA DMA helpers made conditional on
CONFIG_ISA_DMA_API.  As the result, driver got usable for boxen that do
not have ISA DMA stuff and have normal PCI parport card stuck into
them - these never use DMA anyway.

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/parport/Kconfig b/drivers/parport/Kconfig
index 731010e0e6f6..16a2e6ae37f4 100644
--- a/drivers/parport/Kconfig
+++ b/drivers/parport/Kconfig
@@ -34,7 +34,7 @@ config PARPORT
 
 config PARPORT_PC
 	tristate "PC-style hardware"
-	depends on PARPORT && (!SPARC64 || PCI) && (!SPARC32 || BROKEN)
+	depends on PARPORT && (!SPARC64 || PCI) && !SPARC32
 	---help---
 	  You should say Y here if you have a PC-style parallel port. All
 	  IBM PC compatible computers and some Alphas have PC-style
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index c5774e7855d0..e7f3bcb79000 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -67,6 +67,10 @@
 
 #define PARPORT_PC_MAX_PORTS PARPORT_MAX
 
+#ifdef CONFIG_ISA_DMA_API
+#define HAS_DMA
+#endif
+
 /* ECR modes */
 #define ECR_SPP 00
 #define ECR_PS2 01
@@ -610,6 +614,7 @@ dump_parport_state ("leave fifo_write_block_pio", port);
 	return length - left;
 }
 
+#ifdef HAS_DMA
 static size_t parport_pc_fifo_write_block_dma (struct parport *port,
 					       const void *buf, size_t length)
 {
@@ -732,6 +737,17 @@ dump_parport_state ("enter fifo_write_block_dma", port);
 dump_parport_state ("leave fifo_write_block_dma", port);
 	return length - left;
 }
+#endif
+
+static inline size_t parport_pc_fifo_write_block(struct parport *port,
+					       const void *buf, size_t length)
+{
+#ifdef HAS_DMA
+	if (port->dma != PARPORT_DMA_NONE)
+		return parport_pc_fifo_write_block_dma (port, buf, length);
+#endif
+	return parport_pc_fifo_write_block_pio (port, buf, length);
+}
 
 /* Parallel Port FIFO mode (ECP chipsets) */
 static size_t parport_pc_compat_write_block_pio (struct parport *port,
@@ -758,10 +774,7 @@ static size_t parport_pc_compat_write_block_pio (struct parport *port,
 	port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
 
 	/* Write the data to the FIFO. */
-	if (port->dma != PARPORT_DMA_NONE)
-		written = parport_pc_fifo_write_block_dma (port, buf, length);
-	else
-		written = parport_pc_fifo_write_block_pio (port, buf, length);
+	written = parport_pc_fifo_write_block(port, buf, length);
 
 	/* Finish up. */
 	/* For some hardware we don't want to touch the mode until
@@ -856,10 +869,7 @@ static size_t parport_pc_ecp_write_block_pio (struct parport *port,
 	port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
 
 	/* Write the data to the FIFO. */
-	if (port->dma != PARPORT_DMA_NONE)
-		written = parport_pc_fifo_write_block_dma (port, buf, length);
-	else
-		written = parport_pc_fifo_write_block_pio (port, buf, length);
+	written = parport_pc_fifo_write_block(port, buf, length);
 
 	/* Finish up. */
 	/* For some hardware we don't want to touch the mode until
@@ -2285,6 +2295,7 @@ struct parport *parport_pc_probe_port (unsigned long int base,
 		}
 
 #ifdef CONFIG_PARPORT_PC_FIFO
+#ifdef HAS_DMA
 		if (p->dma != PARPORT_DMA_NONE) {
 			if (request_dma (p->dma, p->name)) {
 				printk (KERN_WARNING "%s: dma %d in use, "
@@ -2306,7 +2317,8 @@ struct parport *parport_pc_probe_port (unsigned long int base,
 				}
 			}
 		}
-#endif /* CONFIG_PARPORT_PC_FIFO */
+#endif
+#endif
 	}
 
 	/* Done probing.  Now put the port into a sensible start-up state. */
@@ -2367,11 +2379,13 @@ void parport_pc_unregister_port (struct parport *p)
 	if (p->modes & PARPORT_MODE_ECP)
 		release_region(p->base_hi, 3);
 #ifdef CONFIG_PARPORT_PC_FIFO
+#ifdef HAS_DMA
 	if (priv->dma_buf)
 		pci_free_consistent(priv->dev, PAGE_SIZE,
 				    priv->dma_buf,
 				    priv->dma_handle);
-#endif /* CONFIG_PARPORT_PC_FIFO */
+#endif
+#endif
 	kfree (p->private_data);
 	parport_put_port(p);
 	kfree (ops); /* hope no-one cached it */
diff --git a/include/asm-sparc64/parport.h b/include/asm-sparc64/parport.h
index ab88349ddadc..b7e635544cec 100644
--- a/include/asm-sparc64/parport.h
+++ b/include/asm-sparc64/parport.h
@@ -13,6 +13,12 @@
 
 #define PARPORT_PC_MAX_PORTS	PARPORT_MAX
 
+/*
+ * While sparc64 doesn't have an ISA DMA API, we provide something that looks
+ * close enough to make parport_pc happy
+ */
+#define HAS_DMA
+
 static struct sparc_ebus_info {
 	struct ebus_dma_info info;
 	unsigned int addr;