linux-kernel - [78/98] parisc: Set PCI CLS early in boot.

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Date:	Mon, 10 May 2010 15:35:30 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Carlos ODonell <carlos@...esourcery.com>,
	Kyle McMartin <kyle@...hat.com>
Subject: [78/98] parisc: Set PCI CLS early in boot.

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Carlos O'Donell <carlos@...esourcery.com>

commit 5fd4514bb351b5ecb0da3692fff70741e5ed200c upstream.

Set the PCI CLS early in the boot process to prevent
device failures. In pcibios_set_master use the new
pci_cache_line_size instead of a hard-coded value.

Signed-off-by: Carlos O'Donell <carlos@...esourcery.com>
Reviewed-by: Grant Grundler <grundler@...gle.com>
Signed-off-by: Kyle McMartin <kyle@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 arch/parisc/kernel/pci.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/arch/parisc/kernel/pci.c
+++ b/arch/parisc/kernel/pci.c
@@ -18,7 +18,6 @@
 
 #include <asm/io.h>
 #include <asm/system.h>
-#include <asm/cache.h>		/* for L1_CACHE_BYTES */
 #include <asm/superio.h>
 
 #define DEBUG_RESOURCES 0
@@ -123,6 +122,10 @@ static int __init pcibios_init(void)
 	} else {
 		printk(KERN_WARNING "pci_bios != NULL but init() is!\n");
 	}
+
+	/* Set the CLS for PCI as early as possible. */
+	pci_cache_line_size = pci_dfl_cache_line_size;
+
 	return 0;
 }
 
@@ -171,7 +174,7 @@ void pcibios_set_master(struct pci_dev *
 	** upper byte is PCI_LATENCY_TIMER.
 	*/
 	pci_write_config_word(dev, PCI_CACHE_LINE_SIZE,
-				(0x80 << 8) | (L1_CACHE_BYTES / sizeof(u32)));
+			      (0x80 << 8) | pci_cache_line_size);
 }
 
 


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