>Number: 167197
>Category: kern
>Synopsis: Use of SD card will increase the load of CPU.
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Apr 22 10:40:06 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Takashi Matsubara
>Release: FreeBSD9-STABLE
>Organization:
>Environment:
FreeBSD tamago-two.tamago.local 9.0-STABLE FreeBSD 9.0-STABLE #0: Sun Apr 22
15:08:51 JST 2012
matubara@tamago-two.tamago.local:/usr/obj/usr/src/sys/TAMAGO-TWO amd64
>Description:
If SD card is used,
The following error occurs and the load of CPU increases.
sdhci0-slot0: Got AutoCMD12 error 0x0001, but there is no active command.
-pciconf -lv is -
sdhci0@pci0:13:0:0: class=0x080500 card=0x213317aa chip=0xe8221180 rev=0x01
hdr=0x00
vendor = 'Ricoh Co Ltd'
device = 'MMC/SD Host Controller'
class = base peripheral
subclass = SD host controller
Computer: Lenovo Thinkpad T510
>How-To-Repeat:
Insert SD-card to hardware card controller
>Fix:
The following source code of head/-current is used.
sys/dev/mmc
sys/dev/sdhci
>Release-Note:
>Audit-Trail:
>Unformatted:
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