linux-kernel - [PATCH 4/6] parport_pc: Add a mode mask field for PCI devices

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Date:   Wed, 16 Nov 2022 21:36:05 +0000 (GMT)
From:   "Maciej W. Rozycki" <macro@...am.me.uk>
To:     Sudip Mukherjee <sudipm.mukherjee@...il.com>
cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 4/6] parport_pc: Add a mode mask field for PCI devices

Add a mode mask field for PCI devices and use `__parport_pc_probe_port' 
in place of `parport_pc_probe_port' to apply it.

Signed-off-by: Maciej W. Rozycki <macro@...am.me.uk>
---
 drivers/parport/parport_pc.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

linux-parport-pc-pci-mode-mask.diff
Index: linux-macro/drivers/parport/parport_pc.c
===================================================================
--- linux-macro.orig/drivers/parport/parport_pc.c
+++ linux-macro/drivers/parport/parport_pc.c
@@ -2659,6 +2659,9 @@ static struct parport_pc_pci {
 		/* -1 if not there, >6 for offset-method (max BAR is 6) */
 	} addr[4];
 
+	/* Bit field of parport modes to exclude. */
+	unsigned int mode_mask;
+
 	/* If set, this is called immediately after pci_enable_device.
 	 * If it returns non-zero, no probing will take place and the
 	 * ports will not be used. */
@@ -2862,9 +2865,10 @@ static int parport_pc_pci_probe(struct p
 			       id->vendor, id->device, io_lo, io_hi, irq);
 		}
 		data->ports[count] =
-			parport_pc_probe_port(io_lo, io_hi, irq,
-					       PARPORT_DMA_NONE, &dev->dev,
-					       IRQF_SHARED);
+			__parport_pc_probe_port(io_lo, io_hi, irq,
+						PARPORT_DMA_NONE, &dev->dev,
+						IRQF_SHARED,
+						cards[i].mode_mask, 0);
 		if (data->ports[count])
 			count++;
 	}