jsflash: handle highmem pages (37a5b5c6) · Commits · 戴 / test

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>

drivers/sbus/char/jsflash.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -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;
		}

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