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| author | Heiner Kallweit <hkallweit1@gmail.com> | 2017-03-29 18:54:37 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-08 08:26:08 (GMT) |
| commit | 727a153435fa431c3c99cf5718976bdb73702d06 (patch) | |
| tree | 8b7729920b8c6666361e8624501c59980c5bed26 /include | |
| parent | 8f9bd136b50b15e1ddf12281b34802e948023619 (diff) | |
| download | linux-727a153435fa431c3c99cf5718976bdb73702d06.tar.xz | |
mmc: sdio: fix alignment issue in struct sdio_func
[ Upstream commit 5ef1ecf060f28ecef313b5723f1fd39bf5a35f56 ]
Certain 64-bit systems (e.g. Amlogic Meson GX) require buffers to be
used for DMA to be 8-byte-aligned. struct sdio_func has an embedded
small DMA buffer not meeting this requirement.
When testing switching to descriptor chain mode in meson-gx driver
SDIO is broken therefore. Fix this by allocating the small DMA buffer
separately as kmalloc ensures that the returned memory area is
properly aligned for every basic data type.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Tested-by: Helmut Klein <hgkr.klein@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mmc/sdio_func.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mmc/sdio_func.h b/include/linux/mmc/sdio_func.h index aab032a..97ca105 100644 --- a/include/linux/mmc/sdio_func.h +++ b/include/linux/mmc/sdio_func.h @@ -53,7 +53,7 @@ struct sdio_func { unsigned int state; /* function state */ #define SDIO_STATE_PRESENT (1<<0) /* present in sysfs */ - u8 tmpbuf[4]; /* DMA:able scratch buffer */ + u8 *tmpbuf; /* DMA:able scratch buffer */ unsigned num_info; /* number of info strings */ const char **info; /* info strings */ |