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smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Ok0iN6uZ; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1C145607030B; Wed, 4 Nov 2026 19:26:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Ok0iN6uZ Received: by smtp.kernel.org (Postfix) with ESMTPSA id E5BE81F000C1; Wed, 4 Nov 2026 19:26:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793820405; bh=cd2dCZjA0tUhyc+igqHnY6+9OAULLk3Gm7203fq742M=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Ok0iN6uZQVSYaoCJ8QVSJT8l0lXYmNP35ncQljCwM9H9v59k+rKBWDwXyFuH6JO+M V+A/kQXQfWgbGohORmoO87IV8G5a3EeicQ9/77UKK7TnPSNtklntEWp/u4+8ZixD0c bRD3pYtw6zhIWR1FS+A6aVjGwZINr1WSqex7QK4NXh4aMIjo3IjIJsUG8/xkIzVtfH 6o2/KO4Dtfl777uLHIT6W89DNE9MAKgRdxN0CGLmaTZrAGaPjU++EC952vB7Nwp+HX +JJQg7IqWsBi5yUZmEzjETxgVGZ58lqdaOlqsnXdyQP64dFRJssogaTbhl3zVphWpc sA8Q19qZfKV8A== From: Christian Brauner To: linux-fsdevel@vger.kernel.org Cc: Linus Torvalds , Jann Horn , Josef Bacik , Chris Mason , Jeff Layton , NeilBrown , Eric Dumazet , Thomas Gleixner , Al Viro , Jonathan Corbet , Christoph Hellwig , Greg Kroah-Hartman , Joel Granados , Kees Cook , Jan Kara , Jan Kara , linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-um@lists.infradead.org, linux-wireless@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, ntfs3@lists.linux.dev, platform-driver-x86@vger.kernel.org, coreteam@netfilter.org, kexec@lists.infradead.org, linux-pci@vger.kernel.org, linux-sound@vger.kernel.org, netfilter-devel@vger.kernel.org, dri-devel@lists.freedesktop.org, ibm-acpi-devel@lists.sourceforge.net, jfs-discussion@lists.sourceforge.net, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-cifs@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-mm@kvack.org, linux-sh@vger.kernel.org, linux-usb@vger.kernel.org, samba-technical@lists.samba.org, sparclinux@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-doc@vger.kernel.org, linux-serial@vger.kernel.org, linux-atm-general@lists.sourceforge.net, Takashi Iwai , linux-input@vger.kernel.org, linux-raid@vger.kernel.org, linux-ext4@vger.kernel.org, linux-modules@vger.kernel.org, linux-debuggers@vger.kernel.org, "Christian Brauner (Amutable)" , Chuck Lever , stable@vger.kernel.org Subject: [PATCH RESEND v2 43/51] powerpc/pseries/lparcfg: return h_get_ppp()'s status as a long Date: Wed, 4 Nov 2026 20:26:31 +0100 Message-ID: <20261104-work-procfs-bugfixes-v2-43-021c84d852e0@kernel.org> In-Reply-To: <20261104-work-procfs-bugfixes-v2-0-021c84d852e0@kernel.org> References: <20261104-work-procfs-bugfixes-v2-0-021c84d852e0@kernel.org> X-Mailing-List: linux-debuggers@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Mailer: b4 0.17-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1751; i=brauner@kernel.org; h=from:subject:message-id; bh=sCHTY4Gek8l3mLAy0sLNwHA69+qK9OBjRO3AuZdnaeo=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS9bmJIPL5OsslnfcA9hxcbt6X7Pli9ZcIKN0trZ+9tW 8ub7XmfdpSyMIhxMciKKbI4tJuEyy3nqdhslKkBM4eVCWQIAxenAEykQojhn5Lb2YKPu5tvWS/Q sTtlvpG7vLPqxuJNXEniS7v7VbrqjRkZ/oRc3st548nj6x0rtvtHXl6Vli/7IVk4c/HNJ0nM2So V7AA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit h_get_ppp() returns the status of the H_GET_PPP hcall as an unsigned int. update_ppp() hands it on as its ssize_t result, and lparcfg_write() turns the hcall statuses it knows into an errno and returns anything else as it is. So when H_GET_PPP fails, say with H_PARAMETER (-4), the status comes back as 4294967292 and a write to /proc/powerpc/lparcfg reports that many bytes written. Return the status as the long it is. lparcfg_write() then treats it like the status of H_SET_PPP: an unknown error status is at least negative, and one of the positive long-busy statuses comes back as a byte count, as it does for H_SET_PPP already. Before commit 11529396ea31 ("powerpc/pseries: Split processor entitlement retrieval and gathering to helper routines") a failed H_GET_PPP turned into -EIO. Reported-by: Chris Mason Fixes: 11529396ea31 ("powerpc/pseries: Split processor entitlement retrieval and gathering to helper routines") Cc: stable@vger.kernel.org Signed-off-by: Christian Brauner (Amutable) --- arch/powerpc/platforms/pseries/lparcfg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/pseries/lparcfg.c b/arch/powerpc/platforms/pseries/lparcfg.c index 9882f98c0efb..4f6b2975c6e9 100644 --- a/arch/powerpc/platforms/pseries/lparcfg.c +++ b/arch/powerpc/platforms/pseries/lparcfg.c @@ -113,7 +113,7 @@ struct hvcall_ppp_data { * XXXXXX - Entitled procs capacity % available to the * partitions pool. */ -static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data) +static long h_get_ppp(struct hvcall_ppp_data *ppp_data) { unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = {0}; long rc; -- 2.53.0