Patch "vDPA/ifcvf: Fix pci_read_config_byte() return code handling" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    vDPA/ifcvf: Fix pci_read_config_byte() return code handling

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     vdpa-ifcvf-fix-pci_read_config_byte-return-code-hand.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 4b02f63b0546175336d79ca60bf0a72ad5fc27da
Author: Yuan Can <yuancan@xxxxxxxxxx>
Date:   Thu Oct 17 09:38:12 2024 +0800

    vDPA/ifcvf: Fix pci_read_config_byte() return code handling
    
    [ Upstream commit 7f8825b2a78ac392d3fbb3a2e65e56d9e39d75e9 ]
    
    ifcvf_init_hw() uses pci_read_config_byte() that returns
    PCIBIOS_* codes. The error handling, however, assumes the codes are
    normal errnos because it checks for < 0.
    Convert the error check to plain non-zero check.
    
    Fixes: 5a2414bc454e ("virtio: Intel IFC VF driver for VDPA")
    Signed-off-by: Yuan Can <yuancan@xxxxxxxxxx>
    Message-Id: <20241017013812.129952-1-yuancan@xxxxxxxxxx>
    Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
    Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
    Acked-by: Zhu Lingshan <lingshan.zhu@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c
index 060f837a4f9f7..3b09476e007c8 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.c
+++ b/drivers/vdpa/ifcvf/ifcvf_base.c
@@ -109,7 +109,7 @@ int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *pdev)
 	u32 i;
 
 	ret = pci_read_config_byte(pdev, PCI_CAPABILITY_LIST, &pos);
-	if (ret < 0) {
+	if (ret) {
 		IFCVF_ERR(pdev, "Failed to read PCI capability list\n");
 		return -EIO;
 	}




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