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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2d315f4819dsm8360885ad.37.2026.08.11.06.37.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Aug 2026 06:37:12 -0700 (PDT) From: Yin Li Date: Tue, 11 Aug 2026 21:30:38 +0800 Subject: [PATCH RFC 09/15] arm_mpam: Fix MSC MMIO window size to use resource_size() instead of end - start Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260811-mpam-resctrl-dt-knp-support-v1-9-ea6397bead59@oss.qualcomm.com> References: <20260811-mpam-resctrl-dt-knp-support-v1-0-ea6397bead59@oss.qualcomm.com> In-Reply-To: <20260811-mpam-resctrl-dt-knp-support-v1-0-ea6397bead59@oss.qualcomm.com> To: "Rafael J. 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The previous calculation of end - start was off by one, resulting in a mapped window one byte smaller than the actual resource. Use resource_size() which correctly computes end - start + 1. Signed-off-by: Yin Li --- drivers/resctrl/mpam_devices.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/resctrl/mpam_devices.c b/drivers/resctrl/mpam_devices.c index 1e082fb60e30..5d1854d97371 100644 --- a/drivers/resctrl/mpam_devices.c +++ b/drivers/resctrl/mpam_devices.c @@ -2296,7 +2296,7 @@ static struct mpam_msc *do_mpam_msc_drv_probe(struct platform_device *pdev) dev_err_once(dev, "Failed to map MSC base address\n"); return ERR_CAST(io); } - msc->mapped_hwpage_sz = msc_res->end - msc_res->start; + msc->mapped_hwpage_sz = resource_size(msc_res); msc->mapped_hwpage = io; } else { return ERR_PTR(-EINVAL); -- 2.34.1