linux-kernel - [PATCH 5/5] drivers: mfd: Fix resource request for [mem 0x00000000]

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Message-Id: <1352343356-4006-6-git-send-email-peter@hurleysoftware.com>
Date:	Wed,  7 Nov 2012 21:55:56 -0500
From:	Peter Hurley <peter@...leysoftware.com>
To:	linux-kernel@...r.kernel.org
Cc:	Peter Hurley <peter@...leysoftware.com>,
	Aaron Sierra <asierra@...-inc.com>,
	Peter Tyser <ptyser@...-inc.com>,
	Samuel Ortiz <sameo@...ux.intel.com>
Subject: [PATCH 5/5] drivers: mfd: Fix resource request for [mem 0x00000000]

The older southbridges supported by the lpc_ich driver do not
provide memory-mapped space of the root complex. The driver
correctly avoids computing the iomem address in this case, yet
submits a zeroed resource request anyway (via mfd_add_devices()).

Remove the iomem resource from the resource array submitted to the
mfd core for the older southbridges.

Cc: Aaron Sierra <asierra@...-inc.com>
Cc: Peter Tyser <ptyser@...-inc.com>
Cc: Samuel Ortiz <sameo@...ux.intel.com>
Signed-off-by: Peter Hurley <peter@...leysoftware.com>
---
 drivers/mfd/lpc_ich.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mfd/lpc_ich.c b/drivers/mfd/lpc_ich.c
index a22544f..a46095b 100644
--- a/drivers/mfd/lpc_ich.c
+++ b/drivers/mfd/lpc_ich.c
@@ -842,6 +842,9 @@ static int __devinit lpc_ich_init_wdt(struct pci_dev *dev,
 		res = wdt_mem_res(ICH_RES_MEM_GCS);
 		res->start = base_addr + ACPIBASE_GCS_OFF;
 		res->end = base_addr + ACPIBASE_GCS_END;
+	} else {
+		/* So don't register iomem for TCO ver 1 */
+		--lpc_ich_cells[LPC_WDT].num_resources;
 	}
 
 	lpc_ich_finalize_cell(&lpc_ich_cells[LPC_WDT], id);
-- 
1.7.12.3

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