{"id":2221394,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2221394/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260409-fix_ioevent-v1-2-053b810ae6fb@linux.microsoft.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.2/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260409-fix_ioevent-v1-2-053b810ae6fb@linux.microsoft.com>","list_archive_url":null,"date":"2026-04-09T11:53:07","name":"[2/2] accel/mshv: return correct errno value from ioeventfd failure","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"ed106f9e7506c99662b23645aba9f5cb26d2cc27","submitter":{"id":92925,"url":"http://patchwork.ozlabs.org/api/1.2/people/92925/?format=json","name":"Aastha Rawat","email":"aastharawat@linux.microsoft.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260409-fix_ioevent-v1-2-053b810ae6fb@linux.microsoft.com/mbox/","series":[{"id":499282,"url":"http://patchwork.ozlabs.org/api/1.2/series/499282/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=499282","date":"2026-04-09T11:53:06","name":"Fix issues in accel/mshv ioeventfd handling","version":1,"mbox":"http://patchwork.ozlabs.org/series/499282/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2221394/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2221394/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=linux.microsoft.com header.i=@linux.microsoft.com\n header.a=rsa-sha256 header.s=default header.b=KJ/69FkY;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com;\n s=default; t=1775735620;\n bh=968+R5QinbpCMEGNp1o9WJBEA7Zubhh3wG4nw0uiz5U=;\n h=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n b=KJ/69FkYLGBQbAY9zNUksU0eKSJW/rU/B7jj/92p7dHfZVWCz0P7L0tC6Au/unfKd\n 3tt2BVlCsrJfuf8jkHmuVKI8WIzHIbth7WuXv2wZ396MLCbxvDQeVUxSLgr+j7v6Zq\n M/VXJc3e1mN6In/VOCJbSLWRyyXKjEDG9aIPV7os=","From":"Aastha Rawat ","Date":"Thu, 09 Apr 2026 11:53:07 +0000","Subject":"[PATCH 2/2] accel/mshv: return correct errno value from ioeventfd\n failure","MIME-Version":"1.0","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"7bit","Message-Id":"<20260409-fix_ioevent-v1-2-053b810ae6fb@linux.microsoft.com>","References":"<20260409-fix_ioevent-v1-0-053b810ae6fb@linux.microsoft.com>","In-Reply-To":"<20260409-fix_ioevent-v1-0-053b810ae6fb@linux.microsoft.com>","To":"qemu-devel@nongnu.org","Cc":"Magnus Kulke ,\n Wei Liu ,\n Aastha Rawat ","X-Mailer":"b4 0.15.1","Received-SPF":"pass client-ip=13.77.154.182;\n envelope-from=aastharawat@linux.microsoft.com; helo=linux.microsoft.com","X-Spam_score_int":"-42","X-Spam_score":"-4.3","X-Spam_bar":"----","X-Spam_report":"(-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001,\n SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no","X-Spam_action":"no action","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"Returning the raw ioctl return value results in misleading error\nmessage. Ensure that actual failure reason is propagated by returning\n-errno for ioeventfd failure.\n\nSigned-off-by: Aastha Rawat \n---\n accel/mshv/mshv-all.c | 7 ++++++-\n 1 file changed, 6 insertions(+), 1 deletion(-)","diff":"diff --git a/accel/mshv/mshv-all.c b/accel/mshv/mshv-all.c\nindex e1a8d62f8d..58af674bd9 100644\n--- a/accel/mshv/mshv-all.c\n+++ b/accel/mshv/mshv-all.c\n@@ -275,7 +275,12 @@ static int ioeventfd(int vm_fd, int event_fd, uint64_t addr, Datamatch dm,\n }\n }\n \n- return ioctl(vm_fd, MSHV_IOEVENTFD, &args);\n+ int ret = ioctl(vm_fd, MSHV_IOEVENTFD, &args);\n+ if (ret < 0) {\n+ return -errno;\n+ }\n+\n+ return ret;\n }\n \n static int unregister_ioevent(int vm_fd, int event_fd, uint64_t mmio_addr,\n","prefixes":["2/2"]}