From a153e5e117ff562546ad3914045f2b5e1c302f88 Mon Sep 17 00:00:00 2001 From: Krzysztof Wilczyński Date: Sun, 15 Aug 2021 15:08:24 +0000 Subject: PCI: Add schedule point in proc_bus_pci_read() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit PCI configuration space reads from /proc/bus/pci can often take several milliseconds to complete. Add a schedule point in proc_bus_pci_read() to reduce the maximum latency. A similar change was made for sysfs by 2ce02a864ac1 ("PCI: Add schedule point in pci_read_config()"). Link: https://lore.kernel.org/r/20200824052025.48362-1-benbjiang@tencent.com Link: https://lore.kernel.org/r/20210815150824.96773-1-kw@linux.com Signed-off-by: Krzysztof Wilczyński Signed-off-by: Bjorn Helgaas --- drivers/pci/proc.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/pci/proc.c') diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c index 9bab07302bbf..535076eff5f6 100644 --- a/drivers/pci/proc.c +++ b/drivers/pci/proc.c @@ -83,6 +83,7 @@ static ssize_t proc_bus_pci_read(struct file *file, char __user *buf, buf += 4; pos += 4; cnt -= 4; + cond_resched(); } if (cnt >= 2) { -- cgit v1.2.3