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From: Christian Borntraeger <borntraeger@de.ibm.com>
To: qemu-devel <qemu-devel@nongnu.org>, Cornelia Huck <cohuck@redhat.com>
Cc: Janosch Frank <frankja@linux.ibm.com>,
	David Hildenbrand <david@redhat.com>,
	Halil Pasic <pasic@linux.ibm.com>,
	Christian Borntraeger <borntraeger@de.ibm.com>,
	qemu-s390x <qemu-s390x@nongnu.org>,
	Marc Hartmayer <mhartmay@linux.ibm.com>,
	Richard Henderson <rth@twiddle.net>
Subject: [PATCH] s390x/pv: Retry ioctls on -EINTR
Date: Fri, 27 Mar 2020 05:43:39 -0400
Message-ID: <20200327094339.26111-1-borntraeger@de.ibm.com> (raw)

PV_ENABLE (and maybe others) might return -EINTR when a signal is
pending. Let us retry the ioctl in that case.

Fixes: 4d226deafc44 ("s390x: protvirt: Support unpack facility")
Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Tested-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
---
 hw/s390x/pv.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/hw/s390x/pv.c b/hw/s390x/pv.c
index 8cf5cd2c9b..2758b02c96 100644
--- a/hw/s390x/pv.c
+++ b/hw/s390x/pv.c
@@ -23,7 +23,11 @@ static int __s390_pv_cmd(uint32_t cmd, const char *cmdname, void *data)
         .cmd = cmd,
         .data = (uint64_t)data,
     };
-    int rc = kvm_vm_ioctl(kvm_state, KVM_S390_PV_COMMAND, &pv_cmd);
+    int rc;
+
+    do {
+        rc  = kvm_vm_ioctl(kvm_state, KVM_S390_PV_COMMAND, &pv_cmd);
+    } while (rc == -EINTR);
 
     if (rc) {
         error_report("KVM PV command %d (%s) failed: header rc %x rrc %x "
-- 
2.25.1



             reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-27  9:43 Christian Borntraeger [this message]
2020-03-27  9:49 ` David Hildenbrand
2020-03-27  9:54   ` Christian Borntraeger
2020-03-27  9:56     ` David Hildenbrand
2020-03-27  9:58     ` Christian Borntraeger
2020-03-27 10:01       ` David Hildenbrand
2020-03-27  9:49 ` Janosch Frank

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