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| author | KOBAYASHI Yoshitake <yoshitake.kobayashi@toshiba.co.jp> | 2013-07-07 07:35:45 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-08 07:29:42 -0800 |
| commit | 98048d9b597625034b47f7e0bd04595b6002a045 (patch) | |
| tree | 63ed2a8d80b415d6ac9c164c6790a61a234cfba9 /block | |
| parent | 12c1f610fe8574b5ea9374344f1684b5d972d50b (diff) | |
mmc: block: fix a bug of error handling in MMC driver
commit c8760069627ad3b0dbbea170f0c4c58b16e18d3d upstream.
Current MMC driver doesn't handle generic error (bit19 of device
status) in write sequence. As a result, write data gets lost when
generic error occurs. For example, a generic error when updating a
filesystem management information causes a loss of write data and
corrupts the filesystem. In the worst case, the system will never
boot.
This patch includes the following functionality:
1. To enable error checking for the response of CMD12 and CMD13
in write command sequence
2. To retry write sequence when a generic error occurs
Messages are added for v2 to show what occurs.
Signed-off-by: KOBAYASHI Yoshitake <yoshitake.kobayashi@toshiba.co.jp>
Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions