korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-09-21 20:22:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

PCI/RCEC: Fix RCiEP device to RCEC association

Browse Source 
rcec_assoc_rciep() used "rciep->devfn" (a single byte encoding both the
device and function number) as the device number to check whether the
corresponding bit was set in the RCEC's Association Bitmap for RCiEPs.

But per PCIe r5.0, sec 7.9.10.2, "Association Bitmap for RCiEPs", the
32-bit bitmap contains one bit per device.  That bit applies to all
functions of the device.

Fix rcec_assoc_rciep() to convert the value of "rciep->devfn" to a device
number to ensure that RCiEP devices are correctly associated with the RCEC.

Reported-and-tested-by: Wen Jin <wen.jin@intel.com>
Fixes: 507b460f81 ("PCI/ERR: Add pcie_link_rcec() to associate RCiEPs")
Link: https://lore.kernel.org/r/20210222011717.43266-1-qiuxu.zhuo@intel.com
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Sean V Kelley <sean.v.kelley@intel.com>
This commit is contained in:
Qiuxu Zhuo 2021-02-22 09:17:17 +08:00 committed by Bjorn Helgaas
parent a38fd87484
commit d9b7eae8e3
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/pci/pcie/rcec.c
View File

@ -32,7 +32,7 @@ static bool rcec_assoc_rciep(struct pci_dev *rcec, struct pci_dev *rciep)
/* Same bus, so check bitmap */
for_each_set_bit(devn, &bitmap, 32)
if (devn == rciep->devfn)
if (devn == PCI_SLOT(rciep->devfn))
return true;
return false;