linux-kernel - [PATCH v3] mfd: lpc_ich: Fix resource request for [mem 0x00000000]

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Date:	Fri, 09 Nov 2012 06:55:29 -0500
From:	Peter Hurley <peter@...leysoftware.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	Peter Tyser <ptyser@...-inc.com>, linux-kernel@...r.kernel.org,
	Aaron Sierra <asierra@...-inc.com>
Subject: [PATCH v3] mfd: lpc_ich: 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.

Acked-by: 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>
---

v2: post-decrement to match existing style
    retitle patch subject
v3: respin as standalone patch

 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..f507c09 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);
-- 
1.8.0



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