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Tue, 14 Jul 2026 16:46:11 -0700 (PDT) From: Rosen Penev To: linux-edac@vger.kernel.org Cc: Frank Li , Borislav Petkov , Tony Luck , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , imx@lists.linux.dev (open list:EDAC-FSL_DDR), linux-kernel@vger.kernel.org (open list), llvm@lists.linux.dev (open list:CLANG/LLVM BUILD SUPPORT:Keyword:\b(?i:clang|llvm)\b) Subject: [PATCH] EDAC: fsl_ddr: use devm_platform_ioremap_resource() Date: Tue, 14 Jul 2026 16:46:09 -0700 Message-ID: <20260714234609.902367-1-rosenp@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Replace the open-coded of_address_to_resource() plus devm_request_mem_region() and devm_ioremap() sequence with devm_platform_ioremap_resource(), which folds the resource lookup, region reservation and mapping into one step and returns an ERR_PTR checked with IS_ERR()/PTR_ERR(). Behaviorally equivalent with respect to region reservation: the driver already reserved the region, so the non-overlapping reg requirement was already satisfied. Drop the now-unused linux/of_address.h include. Built for arm64 (defconfig + CONFIG_EDAC_FSL_DDR) with LLVM=1; drivers/edac/fsl_ddr_edac.o compiles cleanly. Assisted-by: opencode:hy3-free Signed-off-by: Rosen Penev --- drivers/edac/fsl_ddr_edac.c | 30 ++++++------------------------ 1 file changed, 6 insertions(+), 24 deletions(-) diff --git a/drivers/edac/fsl_ddr_edac.c b/drivers/edac/fsl_ddr_edac.c index b27dff96aeb6..ae1d54434e38 100644 --- a/drivers/edac/fsl_ddr_edac.c +++ b/drivers/edac/fsl_ddr_edac.c @@ -22,7 +22,6 @@ #include #include -#include #include "edac_module.h" #include "fsl_ddr_edac.h" @@ -495,11 +494,15 @@ int fsl_mc_err_probe(struct platform_device *op) struct mem_ctl_info *mci; struct edac_mc_layer layers[2]; struct fsl_mc_pdata *pdata; - struct resource r; + void __iomem *mc_vbase; u32 ecc_en_mask; u32 sdram_ctl; int res; + mc_vbase = devm_platform_ioremap_resource(op, 0); + if (IS_ERR(mc_vbase)) + return PTR_ERR(mc_vbase); + if (!devres_open_group(&op->dev, fsl_mc_err_probe, GFP_KERNEL)) return -ENOMEM; @@ -531,28 +534,7 @@ int fsl_mc_err_probe(struct platform_device *op) * Default is big endian. */ pdata->little_endian = of_property_read_bool(op->dev.of_node, "little-endian"); - - res = of_address_to_resource(op->dev.of_node, 0, &r); - if (res) { - pr_err("%s: Unable to get resource for MC err regs\n", - __func__); - goto err; - } - - if (!devm_request_mem_region(&op->dev, r.start, resource_size(&r), - pdata->name)) { - pr_err("%s: Error while requesting mem region\n", - __func__); - res = -EBUSY; - goto err; - } - - pdata->mc_vbase = devm_ioremap(&op->dev, r.start, resource_size(&r)); - if (!pdata->mc_vbase) { - pr_err("%s: Unable to setup MC err regs\n", __func__); - res = -ENOMEM; - goto err; - } + pdata->mc_vbase = mc_vbase; if (pdata->flag == TYPE_IMX9) { pdata->inject_vbase = devm_platform_ioremap_resource_byname(op, "inject"); -- 2.55.0