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authorChristoph Hellwig <hch@lst.de>2018-05-09 15:59:47 +0200
committerJens Axboe <axboe@kernel.dk>2018-05-11 15:08:01 -0600
commit37a5b5c61892298b37c684b43cfcde757dd54edf (patch)
tree18dd92baff6665a44656c0fb86daab91dc176311
parentad180f6f718527ab0d6d82b905486b219cdd2263 (diff)
jsflash: handle highmem pages
Just kmap the bio single page payload before processing it. (and yes, now highmem on sparc32 anyway, but kmap_(un)map atomic are nops, so this gives the right example) Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--drivers/sbus/char/jsflash.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/sbus/char/jsflash.c b/drivers/sbus/char/jsflash.c
index 14f377ac1280..8520587b8d09 100644
--- a/drivers/sbus/char/jsflash.c
+++ b/drivers/sbus/char/jsflash.c
@@ -215,6 +215,7 @@ static void jsfd_request(void)
unsigned long offset = blk_rq_pos(req) << 9;
size_t len = blk_rq_cur_bytes(req);
blk_status_t err = BLK_STS_IOERR;
+ void *p;
if ((offset + len) > jdp->dsize)
goto end;
@@ -229,7 +230,9 @@ static void jsfd_request(void)
goto end;
}
- jsfd_read(bio_data(req->bio), jdp->dbase + offset, len);
+ p = kmap_atomic(bio_page(bio)) + bio_offset(bio);
+ jsfd_read(p, jdp->dbase + offset, len);
+ kunmap_atomic(p);
err = BLK_STS_OK;
end:
if (!__blk_end_request_cur(req, err))
@@ -592,7 +595,6 @@ static int jsfd_init(void)
put_disk(disk);
goto out;
}
- blk_queue_bounce_limit(disk->queue, BLK_BOUNCE_HIGH);
jsfd_disk[i] = disk;
}