Since commit 8f9f44f ("tcm_loop: Convert I/O path to use
target_submit_cmd_map_sgls") the file backend is broken if highmem is
enabled. This patch uses kmap() so we get the proper memory.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
Nab, I'm actually a dum dum for sending the previous patch :) That one
seems to work.
drivers/target/target_core_file.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index 0360383..c639b42 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -260,7 +260,7 @@ static int fd_do_readv(struct se_cmd *cmd, struct scatterlist *sgl,
for_each_sg(sgl, sg, sgl_nents, i) {
iov[i].iov_len = sg->length;
- iov[i].iov_base = sg_virt(sg);
+ iov[i].iov_base = kmap(sg_page(sg)) + sg->offset;
}
old_fs = get_fs();
@@ -268,6 +268,8 @@ static int fd_do_readv(struct se_cmd *cmd, struct scatterlist *sgl,
ret = vfs_readv(fd, &iov[0], sgl_nents, &pos);
set_fs(old_fs);
+ for_each_sg(sgl, sg, sgl_nents, i)
+ kunmap(sg_page(sg));
kfree(iov);
/*
* Return zeros and GOOD status even if the READ did not return
@@ -313,7 +315,7 @@ static int fd_do_writev(struct se_cmd *cmd, struct scatterlist *sgl,
for_each_sg(sgl, sg, sgl_nents, i) {
iov[i].iov_len = sg->length;
- iov[i].iov_base = sg_virt(sg);
+ iov[i].iov_base = kmap(sg_page(sg)) + sg->offset;
}
old_fs = get_fs();
@@ -321,6 +323,9 @@ static int fd_do_writev(struct se_cmd *cmd, struct scatterlist *sgl,
ret = vfs_writev(fd, &iov[0], sgl_nents, &pos);
set_fs(old_fs);
+ for_each_sg(sgl, sg, sgl_nents, i)
+ kunmap(sg_page(sg));
+
kfree(iov);
if (ret < 0 || ret != cmd->data_length) {
--
1.7.10.4
--
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