kernel-packages team mailing list archive

[Gabriel Zhi Chen <gabriel.chen@xxxxxxxxxxxxx>]

After kernel upgrade, the MMC cards works normally.

$dmesg

[  226.680865] mmc0: card 0001 removed
[  286.683739] mmc0: new high speed MMC card at address 0001
[  286.683902] mmcblk0: mmc0:0001 AF HMP 245 MiB 
[  286.684659]  mmcblk0: p1
[  286.900332] FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.



** Tags removed: verification-needed-trusty
** Tags added: verification-done-trusty

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https://bugs.launchpad.net/bugs/1365378

Title:
  [Regression] realtek pci-e card readers don't recognize mmc cards

Status in HWE Next Project:
  Fix Released
Status in HWE Next trusty series:
  Fix Committed
Status in HWE Next utopic series:
  Fix Released
Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Trusty:
  Fix Committed
Status in “linux” source package in Utopic:
  Fix Released

Bug description:
  It's a regression introduced by a27fbf2f067b0cd ("mmc: add ignorance
  case for CMD13 CRC error") from v3.13, only trusty is affected.

  This commit could fix it:

  From 5027251eced6e34315a52bd841279df957f627bb Mon Sep 17 00:00:00 2001
  From: Micky Ching <micky_ching@xxxxxxxxxxxxxx>
  Date: Thu, 27 Mar 2014 13:35:04 +0800
  Subject: [PATCH] mmc: rtsx: add R1-no-CRC mmc command type handle

  a27fbf2f067b0cd ("mmc: add ignorance case for CMD13 CRC error") produced
  a cmd.flags unhandled in realtek pci host driver. This will make MMC
  card fail to initialize, this patch is used to handle the new cmd.flags
  condition and MMC card can be used.

  Signed-off-by: Micky Ching <micky_ching@xxxxxxxxxxxxxx>
  Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
  Signed-off-by: Chris Ball <chris@xxxxxxxxxx>
  ---
   drivers/mmc/host/rtsx_pci_sdmmc.c | 3 +++
   1 file changed, 3 insertions(+)

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