linux-kernel - [PATCH] parport: parport_pc: PCI SIO access should also depend on SIO option

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Date:	Sat, 05 Mar 2016 18:46:36 +0100
From:	"Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
CC:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH] parport: parport_pc: PCI SIO access should also depend on
 SIO option

CONFIG_PARPORT_PC_SUPERIO toggles Super IO chip support in parport_pc
code, however only code accessing SIO chip via ISA (or LPC) bus
was conditional on it.

This patch makes SIO chip accesses via PCI bus also dependent on
this config option.

It should be noted that Super IO support in parport_pc is needed
only when firmware has failed to make parallel port available
either via PNP or on standard I/O ranges and user has one of
a few supported SIOs.

Signed-off-by: Maciej S. Szmigiero <mail@...iej.szmigiero.name>
---
 drivers/parport/parport_pc.c | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index 78530d1714dc..b241fb0bcde3 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -2301,6 +2301,7 @@ EXPORT_SYMBOL(parport_pc_unregister_port);
 
 #ifdef CONFIG_PCI
 
+#ifdef CONFIG_PARPORT_PC_SUPERIO
 /* ITE support maintained by Rich Liu <richliu@...rman.org> */
 static int sio_ite_8872_probe(struct pci_dev *pdev, int autoirq, int autodma,
 			      const struct parport_pc_via_data *via)
@@ -2611,6 +2612,9 @@ static struct parport_pc_superio {
 	{ sio_via_probe, &via_8231_data, },
 	{ sio_ite_8872_probe, NULL, },
 };
+#else
+#define last_sio 0
+#endif /* CONFIG_PARPORT_PC_SUPERIO */
 
 enum parport_pc_pci_cards {
 	siig_1p_10x = last_sio,
@@ -2711,11 +2715,13 @@ static struct parport_pc_pci {
 };
 
 static const struct pci_device_id parport_pc_pci_tbl[] = {
+#ifdef CONFIG_PARPORT_PC_SUPERIO
 	/* Super-IO onboard chips */
 	{ 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a },
 	{ 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 },
 	{ PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
 	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 },
+#endif
 
 	/* PCI cards */
 	{ PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x,
@@ -2900,7 +2906,11 @@ static struct pci_driver parport_pc_pci_driver = {
 	.probe		= parport_pc_pci_probe,
 	.remove		= parport_pc_pci_remove,
 };
+#else
+static struct pci_driver parport_pc_pci_driver;
+#endif /* CONFIG_PCI */
 
+#if defined(CONFIG_PCI) && defined(CONFIG_PARPORT_PC_SUPERIO)
 static int __init parport_pc_init_superio(int autoirq, int autodma)
 {
 	const struct pci_device_id *id;
@@ -2922,12 +2932,11 @@ static int __init parport_pc_init_superio(int autoirq, int autodma)
 	return ret; /* number of devices found */
 }
 #else
-static struct pci_driver parport_pc_pci_driver;
 static int __init parport_pc_init_superio(int autoirq, int autodma)
 {
 	return 0;
 }
-#endif /* CONFIG_PCI */
+#endif
 
 #ifdef CONFIG_PNP
 
@@ -3125,7 +3134,7 @@ static int __init parport_parse_dma(const char *dmastr, int *val)
 				     PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO);
 }
 
-#ifdef CONFIG_PCI
+#if defined(CONFIG_PCI) && defined(CONFIG_PARPORT_PC_SUPERIO)
 static int __init parport_init_mode_setup(char *str)
 {
 	printk(KERN_DEBUG
@@ -3162,7 +3171,7 @@ module_param_array(dma, charp, NULL, 0);
 MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation");
 module_param(verbose_probing, int, 0644);
 #endif
-#ifdef CONFIG_PCI
+#if defined(CONFIG_PCI) && defined(CONFIG_PARPORT_PC_SUPERIO)
 static char *init_mode;
 MODULE_PARM_DESC(init_mode,
 	"Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)");
@@ -3174,7 +3183,7 @@ static int __init parse_parport_params(void)
 	unsigned int i;
 	int val;
 
-#ifdef CONFIG_PCI
+#if defined(CONFIG_PCI) && defined(CONFIG_PARPORT_PC_SUPERIO)
 	if (init_mode)
 		parport_init_mode_setup(init_mode);
 #endif
@@ -3292,7 +3301,7 @@ __setup("parport=", parport_setup);
  *
  * parport_init_mode=[spp|ps2|epp|ecp|ecpepp]
  */
-#ifdef CONFIG_PCI
+#if defined(CONFIG_PCI) && defined(CONFIG_PARPORT_PC_SUPERIO)
 __setup("parport_init_mode=", parport_init_mode_setup);
 #endif
 #endif