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PCI/LINK: Deduplicate bandwidth reports for multi-function devices

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If a multi-function device's bandwidth is already limited when it is
enumerated, a message is logged only for function 0.  By contrast, when
downtraining occurs after enumeration, a message is logged for all
functions.  That's because the former uses pcie_report_downtraining(),
whereas the latter uses __pcie_print_link_status() (which doesn't filter
functions != 0).  I am seeing this happen on a MacBookPro9,1 with a GPU
(function 0) and an integrated HDA controller (function 1).

Avoid this incongruence by calling pcie_report_downtraining() in both
cases.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alexandru Gagniuc <alex.gagniuc@dellteam.com>
This commit is contained in:
Lukas Wunner
2019-03-20 12:05:30 +01:00
committed by Bjorn Helgaas
parent 55397ce8df
commit 0fa635aec9
3 changed files with 3 additions and 2 deletions
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2
drivers/pci/pcie/bw_notification.c
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@ -76,7 +76,7 @@ static irqreturn_t pcie_bw_notification_handler(int irq, void *context)
*/
down_read(&pci_bus_sem);
list_for_each_entry(dev, &port->subordinate->devices, bus_list)
__pcie_print_link_status(dev, false);
pcie_report_downtraining(dev);
up_read(&pci_bus_sem);
return IRQ_HANDLED;