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Mon, 6 Oct 2025 10:46:56 +0000 Message-ID: <6294fb07-31b4-4c0e-9023-7c5ab604bbf1@intel.com> Date: Mon, 6 Oct 2025 13:46:53 +0300 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/2] mmc: sdhci: add quirk to disable bounce buffer To: Michael Garofalo CC: , , References: <21d7f0c8-9a61-4759-b655-b12a6fad9885@intel.com> <20251006092815.2555733-1-officialTechflashYT@gmail.com> Content-Language: en-US From: Adrian Hunter Organization: Intel Finland Oy, Registered Address: c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo, Business Identity Code: 0357606 - 4, Domiciled in Helsinki In-Reply-To: <20251006092815.2555733-1-officialTechflashYT@gmail.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: DU2PR04CA0245.eurprd04.prod.outlook.com (2603:10a6:10:28e::10) To IA1PR11MB7198.namprd11.prod.outlook.com (2603:10b6:208:419::15) Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: IA1PR11MB7198:EE_|SA1PR11MB7063:EE_ X-MS-Office365-Filtering-Correlation-Id: 59b37edb-1cb1-4a0c-e682-08de04c5ab3f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014; 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On some hardware, this is required for proper operation. An >>>> example of such hardware is the SDHCI controller of the Nintendo Wii's >>>> "Hollywood" chipset. Without this patch, the onboard Broadcom 4318 >>>> Wi-Fi fails to connect to any networks. >>> >>> The bounce buffer should not make any difference, so it is likely >>> a different problem that gets hidden when the bounce buffer is not >>> used. >>> >>>> Could you enable dynamic debug messages and show the messages >>>> for the failing case? >>> >>> Actually will also need to see the messages in the "fixed" case >>> to compare. > I'm afraid I won't be able to provide those easily, at least not with the > commands you've provided. Since the rootfs is _also_ running from SD, > turning on full MMC logs like this produces an obscene amount of noise > from the storage, unrelated to the SDIO wireless. It gets even worse with > my original intention, which was to save the logs to SD Card, (since my USB > Gecko serial console is rather flakey, and introduces corruption now and then), > since it's now logging the writes of it's own logs in a permanent loop. > If there's a way to narrow down the logs to specifically whatever portions > you're interested in, and filter out the noise, I would happily provide it. Are there any error messages?