linux-kernel - [MCA] fix bus matching

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Date:	Thu, 03 May 2007 10:54:26 -0500
From:	James Bottomley <James.Bottomley@...elEye.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: [MCA] fix bus matching

There's a bug in the MCA bus matching algorithm in that it promotes from
signed short to int before comparing with the actual id and does sign
extension on anything > 0x7fff (which means that pos ids > 0x7fff never
get correctly matched).

Signed-off-by: James Bottomley <James.Bottomley@...elEye.com>

---
diff --git a/drivers/mca/mca-bus.c b/drivers/mca/mca-bus.c
index da862e4..a70fe00 100644
--- a/drivers/mca/mca-bus.c
+++ b/drivers/mca/mca-bus.c
@@ -47,7 +47,7 @@ static int mca_bus_match (struct device *dev, struct device_driver *drv)
 {
 	struct mca_device *mca_dev = to_mca_device (dev);
 	struct mca_driver *mca_drv = to_mca_driver (drv);
-	const short *mca_ids = mca_drv->id_table;
+	const unsigned short *mca_ids = mca_drv->id_table;
 	int i;
 
 	if (!mca_ids)


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