linux-kernel - [PATCH] parport_pc: Limit the number of PCI BAR pairs to 2

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Date:   Wed, 16 Nov 2022 21:36:22 +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] parport_pc: Limit the number of PCI BAR pairs to 2

Decrease the number of PCI BAR pair slots allocated for port subdrivers 
from 4 to 2 as none wants more than 2 at this time, reducing the memory 
footprint a little.  No functional change.

Signed-off-by: Maciej W. Rozycki <macro@...am.me.uk>
---
 drivers/parport/parport_pc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

linux-parport-pc-pci-bars.diff
Index: linux-macro/drivers/parport/parport_pc.c
===================================================================
--- linux-macro.orig/drivers/parport/parport_pc.c
+++ linux-macro/drivers/parport/parport_pc.c
@@ -2657,7 +2657,7 @@ static struct parport_pc_pci {
 		int lo;
 		int hi;
 		/* -1 if not there, >6 for offset-method (max BAR is 6) */
-	} addr[4];
+	} addr[2];

 	/* Bit field of parport modes to exclude. */
 	unsigned int mode_mask;