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[96.255.20.138]) by smtp.gmail.com with ESMTPSA id af79cd13be357-88f358726c7sm431196185a.7.2025.10.17.07.11.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Oct 2025 07:11:17 -0700 (PDT) Date: Fri, 17 Oct 2025 10:11:15 -0400 From: Gregory Price To: Szuying Chen Cc: akpm@linux-foundation.org, andriy.shevchenko@linux.intel.com, dan.j.williams@intel.com, jhubbard@nvidia.com, akinobu.mita@gmail.com, sumanthk@linux.ibm.com, peterz@infradead.org, huang.ying.caritas@gmail.com, linux-kernel@vger.kernel.org, Andrew_Su@asmedia.com.tw, Yd_Tseng@asmedia.com.tw, Ed_Huang@asmedia.com.tw, Cindy1_Hsu@asmedia.com.tw, Jesse1_Chang@asmedia.com.tw, Richard_Hsu@asmedia.com.tw, Chloe_Chen@asmedia.com.tw Subject: Re: [PATCH] kernel: resourse: Add conditional handling for ACPI device Message-ID: References: <20251017023531.5616-1-Chloe_Chen@asmedia.com.tw> 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=us-ascii Content-Disposition: inline In-Reply-To: <20251017023531.5616-1-Chloe_Chen@asmedia.com.tw> On Fri, Oct 17, 2025 at 10:35:31AM +0800, Szuying Chen wrote: > To avoid address conflicts and related errors, specific checks for > the ACPI device "AMDIF031" should be bypassed. > > Signed-off-by: Szuying Chen > --- > kernel/resource.c | 23 +++++++++++++++++++++++ > 1 file changed, 23 insertions(+) > > diff --git a/kernel/resource.c b/kernel/resource.c > index b9fa2a4ce089..9ffcd5bdb62e 100644 > --- a/kernel/resource.c > +++ b/kernel/resource.c > @@ -177,6 +177,27 @@ static struct resource *alloc_resource(gfp_t flags) > return kzalloc(sizeof(struct resource), flags); > } > > +static int IgnoreResource(struct resource *tmp) > +{ > + char *pt, *name_sep; > + char *name; > + > + pt = kstrdup(tmp->name, GFP_KERNEL); > + name_sep = pt; > + if (!name_sep) > + goto out; > + > + name = strsep(&name_sep, ":"); > + if (strcmp(name, "AMDIF031") == 0) { > + kfree(pt); > + return 1; > + } Assuming we actually want this, i think we probably need to put this in an arch/ extension, not hard-coded into kernel/. There's no need for non-x86 platforms to ever touch this. > + > +out: > + kfree(pt); > + return 0; > +} > + > /* Return the conflict entry if you can't request it */ > static struct resource * __request_resource(struct resource *root, struct resource *new) > { > @@ -202,6 +223,8 @@ static struct resource * __request_resource(struct resource *root, struct resour > p = &tmp->sibling; > if (tmp->end < start) > continue; > + if (IgnoreResource(tmp)) > + continue; > return tmp; > } > } > -- > 2.39.2 >