Re: [PATCH v6 07/10] PCI/RCEC: Add RCiEP's linked RCEC to AER/ERR

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On 27 Sep 2020, at 18:47, Bjorn Helgaas wrote:

On Sun, Sep 27, 2020 at 06:45:45PM -0500, Bjorn Helgaas wrote:
On Tue, Sep 22, 2020 at 02:38:56PM -0700, Sean V Kelley wrote:
From: Qiuxu Zhuo <qiuxu.zhuo@xxxxxxxxx>

 	pci_dbg(dev, "broadcast error_detected message\n");
 	if (state == pci_channel_io_frozen) {
-		pci_bridge_walk(bridge, report_frozen_detected, &status);
+		pci_bridge_walk(bridge, dev, report_frozen_detected, &status);
 		if (type == PCI_EXP_TYPE_RC_END) {
+			/*
+			 * The callback only clears the Root Error Status
+			 * of the RCEC (see aer.c).
+			 */
+			if (bridge)
+				reset_subordinate_devices(bridge);

It's unfortunate to add yet another special case in this code, and I'm
not thrilled about the one in aer_root_reset() either.  It's just not
obvious why they should be there.  I'm sure if I spent 30 minutes
decoding things, it would all make sense.  Guess I'm just griping
because I don't have a better suggestion.

I'm sorry, this was unkind of me.  If I don't have a constructive
idea, there's no reason for me to complain about this.  I apologize.

Bjorn

No worries at all. The unfortunate handling of the Spec for RCEC/RCiEP associations and the added needs for native versus non-native is frustrating.

Sean



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