linux-kernel - [PATCH] vfio: Extended capability fixes

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Message-ID: <20101102050835.2963.63375.stgit@s20.home>
Date:	Mon, 01 Nov 2010 23:08:35 -0600
From:	Alex Williamson <alex.williamson@...hat.com>
To:	pugs@...co.com
Cc:	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	kvm@...r.kernel.org, alex.williamson@...hat.com
Subject: [PATCH] vfio: Extended capability fixes

- Virtual channel position gets truncated as a u8
 - Print the ecap that's unknown, not the last cap we saw
 - Print actual config offset, which provides enough info to make
   some sense of the error.

Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
---

 drivers/vfio/vfio_pci_config.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/vfio/vfio_pci_config.c b/drivers/vfio/vfio_pci_config.c
index 8af995d..8304316 100644
--- a/drivers/vfio/vfio_pci_config.c
+++ b/drivers/vfio/vfio_pci_config.c
@@ -410,7 +410,7 @@ static int vfio_msi_cap_len(struct vfio_dev *vdev, u8 pos)
  * Determine extended capability length for VC (2 & 9) and
  * MFVC capabilities
  */
-static int vfio_vc_cap_len(struct vfio_dev *vdev, u8 pos)
+static int vfio_vc_cap_len(struct vfio_dev *vdev, u16 pos)
 {
 	struct pci_dev *pdev = vdev->pdev;
 	u32 dw;
@@ -580,7 +580,7 @@ int vfio_build_config_map(struct vfio_dev *vdev)
 				printk(KERN_WARNING
 					"%s: pci config conflict at %x, "
 					"caps %x %x\n",
-					__func__, i, map[pos+i], cap);
+					__func__, pos+i, map[pos+i], cap);
 			map[pos+i] = cap;
 		}
 		ret = pci_read_config_byte(pdev, pos + PCI_CAP_LIST_NEXT, &pos);
@@ -683,7 +683,7 @@ int vfio_build_config_map(struct vfio_dev *vdev)
 		if (len == 0 || len == 0xFF) {
 			printk(KERN_WARNING
 				"%s: unknown length for pci ext cap %x\n",
-				__func__, cap);
+				__func__, ecap);
 			len = PCI_CAP_SIZEOF;
 		}
 		for (i = 0; i < len; i++) {
@@ -691,7 +691,7 @@ int vfio_build_config_map(struct vfio_dev *vdev)
 				printk(KERN_WARNING
 					"%s: pci config conflict at %x, "
 					"caps %x %x\n",
-					__func__, i, map[epos+i], ecap);
+					__func__, epos+i, map[epos+i], ecap);
 			map[epos+i] = ecap;
 		}
 

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