From: Helge Deller <deller@gmx.de>
Date: Fri, 19 Jan 2024 20:16:39 +0000 (+0100)
Subject: parisc: Prevent hung tasks when printing inventory on serial console
X-Git-Tag: v6.6.18~272
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=63bc8a3940834b334e8fe7c265ec056fba00c269;p=thirdparty%2Fkernel%2Fstable.git

parisc: Prevent hung tasks when printing inventory on serial console

commit c8708d758e715c3824a73bf0cda97292b52be44d upstream.

Printing the inventory on a serial console can be quite slow and thus may
trigger the hung task detector (CONFIG_DETECT_HUNG_TASK=y) and possibly
reboot the machine. Adding a cond_resched() prevents this.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # v6.0+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/parisc/kernel/drivers.c b/arch/parisc/kernel/drivers.c
index ed8b759480614..8be4558ef33c0 100644
--- a/arch/parisc/kernel/drivers.c
+++ b/arch/parisc/kernel/drivers.c
@@ -1004,6 +1004,9 @@ static __init int qemu_print_iodc_data(struct device *lin_dev, void *data)
 
 	pr_info("\n");
 
+	/* Prevent hung task messages when printing on serial console */
+	cond_resched();
+
 	pr_info("#define HPA_%08lx_DESCRIPTION \"%s\"\n",
 		hpa, parisc_hardware_description(&dev->id));