hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

mmc: android-goldfish: fix bad logic of sg_copy_{from,to}_buffer conversion 

The conversion to sg_copy_{from,to}_buffer has been done in the wrong
way. sg_copy_to_buffer is a copy from an SG list to a linear buffer so
it can't replace memcpy(dest, host->virt_base, data->sg->length) where
dest is the virtual address of the SG. Same for sg_copy_from_buffer
but in the opposite way.

Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Suggested-by: Douglas Gilbert <dgilbert@interlog.com>
Fixes: 53d7e098ba ("mmc: android-goldfish: use sg_copy_{from,to}_buffer")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ludovic Desroches 2018-08-20 10:54:45 +02:00 committed by Ulf Hansson
parent 19f5e9e015
commit 17e96d8516
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/mmc/host/android-goldfish.c
View File

@ -217,7 +217,7 @@ static void goldfish_mmc_xfer_done(struct goldfish_mmc_host *host,
* We don't really have DMA, so we need
* to copy from our platform driver buffer
*/
sg_copy_to_buffer(data->sg, 1, host->virt_base,
sg_copy_from_buffer(data->sg, 1, host->virt_base,
data->sg->length);
}
host->data->bytes_xfered += data->sg->length;
@ -393,7 +393,7 @@ static void goldfish_mmc_prepare_data(struct goldfish_mmc_host *host,
* We don't really have DMA, so we need to copy to our
* platform driver buffer
*/
sg_copy_from_buffer(data->sg, 1, host->virt_base,
sg_copy_to_buffer(data->sg, 1, host->virt_base,
data->sg->length);
}
}