{"id":2220570,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2220570/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/7e618bc382608acc390054786e3119db2856822b.1775569027.git.ritesh.list@gmail.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/1.2/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/","list_archive_url":"https://lore.kernel.org/linuxppc-dev/","list_archive_url_format":"https://lore.kernel.org/linuxppc-dev/{}/","commit_url_format":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}"},"msgid":"<7e618bc382608acc390054786e3119db2856822b.1775569027.git.ritesh.list@gmail.com>","list_archive_url":"https://lore.kernel.org/linuxppc-dev/7e618bc382608acc390054786e3119db2856822b.1775569027.git.ritesh.list@gmail.com/","date":"2026-04-07T14:31:36","name":"[RFC,v1,2/6] pseries/papr-hvpipe: Fix the usage of copy_to_user()","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"3d8fd9479278f0b42c0debcc08fbf8ce14d57b5f","submitter":{"id":79126,"url":"http://patchwork.ozlabs.org/api/1.2/people/79126/?format=json","name":"Ritesh Harjani (IBM)","email":"ritesh.list@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/7e618bc382608acc390054786e3119db2856822b.1775569027.git.ritesh.list@gmail.com/mbox/","series":[{"id":498988,"url":"http://patchwork.ozlabs.org/api/1.2/series/498988/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=498988","date":"2026-04-07T14:31:34","name":"pseries/papr-hvpipe: Fix and simplify papr-hvpipe","version":1,"mbox":"http://patchwork.ozlabs.org/series/498988/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2220570/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2220570/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=D/Ffg2Wf;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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If there was\nan error writing bytes into the user buffer, i.e. if copy_to_user\nreturns a non-zero value, then we simply return -EFAULT from the\n->read() call.\n\nSigned-off-by: Ritesh Harjani (IBM) \n---\n arch/powerpc/platforms/pseries/papr-hvpipe.c | 9 +++++----\n 1 file changed, 5 insertions(+), 4 deletions(-)","diff":"diff --git a/arch/powerpc/platforms/pseries/papr-hvpipe.c b/arch/powerpc/platforms/pseries/papr-hvpipe.c\nindex ef10f5a5a4fa..fffebbae113c 100644\n--- a/arch/powerpc/platforms/pseries/papr-hvpipe.c\n+++ b/arch/powerpc/platforms/pseries/papr-hvpipe.c\n@@ -206,10 +206,11 @@ static int hvpipe_rtas_recv_msg(char __user *buf, int size)\n \t\t\t\t\tbytes_written, size);\n \t\t\t\tbytes_written = size;\n \t\t\t}\n-\t\t\tret = copy_to_user(buf,\n+\t\t\tif (copy_to_user(buf,\n \t\t\t\t\trtas_work_area_raw_buf(work_area),\n-\t\t\t\t\tbytes_written);\n-\t\t\tif (!ret)\n+\t\t\t\t\tbytes_written))\n+\t\t\t\tret = -EFAULT;\n+\t\t\telse\n \t\t\t\tret = bytes_written;\n \t\t}\n \t} else {\n@@ -376,7 +377,7 @@ static ssize_t papr_hvpipe_handle_read(struct file *file,\n \n \tret = copy_to_user(buf, &hdr, HVPIPE_HDR_LEN);\n \tif (ret)\n-\t\treturn ret;\n+\t\treturn -EFAULT;\n \n \t/*\n \t * Message event has payload, so get the payload with\n","prefixes":["RFC","v1","2/6"]}