diff options
| author | Neil Armstrong <narmstrong@baylibre.com> | 2021-09-28 09:36:52 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-13 10:08:16 +0200 |
| commit | 4920aae61bd9def1bfe105f396b2253d91f6231c (patch) | |
| tree | bd24097d72c294c88154001391d5e4ce0b9a7bee /fs/overlayfs/dir.c | |
| parent | 47f7bb3dc2a3f7f5653cfc7ae7cafb9a1e3f4d24 (diff) | |
mmc: meson-gx: do not use memcpy_to/fromio for dram-access-quirk
commit 8a38a4d51c5055d0201542e5ea3c0cb287f6e223 upstream.
The memory at the end of the controller only accepts 32bit read/write
accesses, but the arm64 memcpy_to/fromio implementation only uses 64bit
(which will be split into two 32bit access) and 8bit leading to incomplete
copies to/from this memory when the buffer is not multiple of 8bytes.
Add a local copy using writel/readl accesses to make sure we use the right
memory access width.
The switch to memcpy_to/fromio was done because of 285133040e6c
("arm64: Import latest memcpy()/memmove() implementation"), but using memcpy
worked before since it mainly used 32bit memory acceses.
Fixes: 103a5348c22c ("mmc: meson-gx: use memcpy_to/fromio for dram-access-quirk")
Reported-by: Christian Hewitt <christianshewitt@gmail.com>
Suggested-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210928073652.434690-1-narmstrong@baylibre.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/overlayfs/dir.c')
0 files changed, 0 insertions, 0 deletions