From nobody Wed Apr 1 20:45:07 2026 Received: from mail-ed1-f73.google.com (mail-ed1-f73.google.com [209.85.208.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9A1E033E345 for ; Wed, 1 Apr 2026 11:17:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775042264; cv=none; b=JqPz4gFomlXS+pBhj5ite1NTx8ZBwfkxCb5TcF+h+owO0dSMuiCCnVODVOsI9CGuwHgZqGaWcq08j1DObf+keItv1baPfbimCJuaRftJwJOB/CQwK7SlZykOI+6uVrbprHSxucMK8FWTygn9a2+FrT7fzJ1eKny+YYDx7OglVbo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775042264; c=relaxed/simple; bh=sWduUSKiOC0a9Fbvm+5hi8JJdMCEGC0Qz7YOQRmOG9o=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=LqzNd/llHo3SwIb7t4n9iQe5hlGPzB+kaQN/SOEKR9aEefuFTah7wyNeHR6xjPRdxUNsJtdj3FGXDekR8UHVaH+Nfo5oGlJ6sW550+RmLOf9WI+jDl9SktIg71W8lXgVevlYhpChv4aBTY46EfLBNR6tbszhybR2MaBTCzJOEWQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--sebastianene.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=pehvwgb0; arc=none smtp.client-ip=209.85.208.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--sebastianene.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="pehvwgb0" Received: by mail-ed1-f73.google.com with SMTP id 4fb4d7f45d1cf-66b946147b4so5201075a12.1 for ; Wed, 01 Apr 2026 04:17:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1775042261; x=1775647061; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=dCt0i8MZg5wAzl1+V++7RTyCQCjxurtL7p1kb7bfrdY=; b=pehvwgb0W/PTODvvzy6vxNGuPeeJ3qebZIutiG1vt0FRGNT/hmpBwmckCZTXUDmHe9 QlDe05ZXN/PyCLn/zDG611/uDBLJo3Jce/VeUO7m5zF+j+psoatAVIigA9hRtLaAMAxa a82MRtQyJT5RyFrHqLP1Y4gQDE8rs82PDO3Jxy6ZM3/pT64PZu7QviCpD8w3JnCyrVSR X81pOQtG9jbxrncSiR3B74Aol3Pz1ib5Dh9/VniNXwR9LSjrY+s41nM7oc+UvZgog+xH 0qULKHEUIuiG9/wb48XMTTy3acsPco7Ml7AB2ogxLWhVpHLEHu3Hvn6043gahvQHdsvK fewg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775042261; x=1775647061; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=dCt0i8MZg5wAzl1+V++7RTyCQCjxurtL7p1kb7bfrdY=; b=qAlufsyYVcY9LiU2dkfNyW4IXr5RcR9b9HkgxG850UsbToOgwjIWJNT9Gg84TOLzm2 nsO4nCf20B1DtK6SAANfNzZ+gXwbjPy/KIDyVXvhAEamzXyfQgmjeUYA3bh/ExD+qiod SYu4IG/DSXfsz6iOHHQmfvHRfsksveimvd8W3cchvMPVs7R7HLWz0wg+L3Zf09Qcy934 7Z4fv5zMrdb1KqRa0XMRerBchk9dsJ+OcZhLmTYFrY7u4gHM7HTiU06pj1K1oAdVpxGk ZWRkGJns/L1e4N1yqsaAx0KyY+zup3TcBZpW/DozIWYsrTe8bDBu6pEDNyKZbxDLfMtR VcpQ== X-Forwarded-Encrypted: i=1; AJvYcCVuUYYyyZBsO14iD+9zQ2+QcWwum48yHlLNZpFoT/lrO9/29/XipDUbD9TC3mYeYLsSQN2RbEerQpbwjKI=@vger.kernel.org X-Gm-Message-State: AOJu0Yz2F33vsi6LZDWdqCJ0k3optiF8mmJVrRqRUXuA62nTIU+P9dEP BLHBshLfP8vWZMYmMKdYazMRw2wbcJcS1ZS6TmrKbJUle1S2usjT4ZYI4IhSbKNRBTB/ghV0LIQ rAO4Jo1i+1jvmyMBfk4qcTyJclUzYYA== X-Received: from edaa2.prod.google.com ([2002:a05:6402:24c2:b0:66b:b7d3:7cf1]) (user=sebastianene job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6402:288:b0:66d:ce0a:25a2 with SMTP id 4fb4d7f45d1cf-66dce0a2766mr1492419a12.14.1775042260930; Wed, 01 Apr 2026 04:17:40 -0700 (PDT) Date: Wed, 1 Apr 2026 11:17:38 +0000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.53.0.1185.g05d4b7b318-goog Message-ID: <20260401111738.323647-1-sebastianene@google.com> Subject: [PATCH] firmware: arm_ffa: Use the correct buffer size during RXTX_MAP From: Sebastian Ene To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, android-kvm@google.com Cc: sudeep.holla@kernel.org, Sebastian Ene Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Don't use the discovered buffer size from an FFA_FEATURES call directly since we can run on a system that has the PAGE_SIZE larger than the returned size which makes the alloc_pages_exact for the buffer to be rounded up. Fixes: 61824feae5c0 ("firmware: arm_ffa: Fetch the Rx/Tx buffer size using = ffa_features()") Signed-off-by: Sebastian Ene --- drivers/firmware/arm_ffa/driver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/d= river.c index f2f94d4d533e..d0c926aca120 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -2078,7 +2078,7 @@ static int __init ffa_init(void) =20 ret =3D ffa_rxtx_map(virt_to_phys(drv_info->tx_buffer), virt_to_phys(drv_info->rx_buffer), - rxtx_bufsz / FFA_PAGE_SIZE); + DIV_ROUND_UP(rxtx_bufsz, PAGE_SIZE) / FFA_PAGE_SIZE); if (ret) { pr_err("failed to register FFA RxTx buffers\n"); goto free_pages; --=20 2.53.0.1185.g05d4b7b318-goog