From mboxrd@z Thu Jan 1 00:00:00 1970 From: Simon Glass Date: Wed, 30 Aug 2017 14:34:18 +0800 Subject: [U-Boot] ** Can't read Driver Desriptor Block ** In-Reply-To: References: <34c835e4-920c-19c8-5202-dcd26ee219ce@gmx.de> Message-ID: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi, On 30 August 2017 at 09:54, Bin Meng wrote: > Hi Heinrich, > > On Wed, Aug 30, 2017 at 4:26 AM, Heinrich Schuchardt wrote: >> Hello Simon, >> >> U-Boot HEAD qemu-86_defconfig cannot discover an IDE disk with one FAT >> partition in qemu-system-x86_64. >> >> By bisection I found this patch. >> >> b7c6baef2891ce8978cbfddb66e944943473ac21 >> x86: Convert MMC to driver model >> >> With this patch I get >> >> IDE: Bus 0: OK Bus 1: OK >> Device 0: Model: QEMU HARDDISK Firm: 2.5+ Ser#: QM00001 >> Type: Hard Disk >> Supports 48-bit addressing >> Capacity: 128.0 MB = 0.1 GB (262144 x 512) >> ** Can't read Driver Desriptor Block ** >> Device 1: not available >> Device 2: Model: QEMU Firm: 2.5+ Ser#: QEMU DVD-ROM >> Type: Removable CD ROM >> Capacity: not available >> Device 3: not available >> >> => ide info >> => >> >> Without the patch I get=> ide info >> Device 0: Model: QEMU HARDDISK Firm: 2.5+ Ser#: QM00001 >> Type: Hard Disk >> Supports 48-bit addressing >> Capacity: 128.0 MB = 0.1 GB (262144 x 512) >> Device 2: Model: QEMU Firm: 2.5+ Ser#: QEMU DVD-ROM >> Type: Removable CD ROM >> Capacity: not available >> >> I think we observe two independent errors here: >> >> - The hard disk Device 0 is not read. >> - The ide command stops at the first device that is not available. >> >> I guess only the first is caused by your patch. > > Both logs look fine to me. The "Can't read Driver Desriptor Block" > comes from part_mac.c. Did you verify the actual IDE read/write fails > with current HEAD? We should definitely change that message to debug(). It is very confusing. I think I have hunted it down twice myself :-) Regards, Simon