From: Xiubo Li Date: Fri, 30 Jun 2017 08:14:16 +0000 (+0800) Subject: tcmu: Fix flushing cmd entry dcache page X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9d62bc0e6d79b11e3298e831358155930fb8f5e3;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git tcmu: Fix flushing cmd entry dcache page When feeding the tcmu's cmd ring, we need to flush the dcache page for the cmd entry to make sure these kernel stores are visible to user space mappings of that page. For the none PAD cmd entry, this will be flushed at the end of the tcmu_queue_cmd_ring(). Signed-off-by: Xiubo Li Reviewed-by: Mike Christie Signed-off-by: Nicholas Bellinger --- diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index 1e69b1b32558..a8ff6b5fdec8 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -825,21 +825,21 @@ tcmu_queue_cmd_ring(struct tcmu_cmd *tcmu_cmd) size_t pad_size = head_to_end(cmd_head, udev->cmdr_size); entry = (void *) mb + CMDR_OFF + cmd_head; - tcmu_flush_dcache_range(entry, sizeof(*entry)); tcmu_hdr_set_op(&entry->hdr.len_op, TCMU_OP_PAD); tcmu_hdr_set_len(&entry->hdr.len_op, pad_size); entry->hdr.cmd_id = 0; /* not used for PAD */ entry->hdr.kflags = 0; entry->hdr.uflags = 0; + tcmu_flush_dcache_range(entry, sizeof(*entry)); UPDATE_HEAD(mb->cmd_head, pad_size, udev->cmdr_size); + tcmu_flush_dcache_range(mb, sizeof(*mb)); cmd_head = mb->cmd_head % udev->cmdr_size; /* UAM */ WARN_ON(cmd_head != 0); } entry = (void *) mb + CMDR_OFF + cmd_head; - tcmu_flush_dcache_range(entry, sizeof(*entry)); tcmu_hdr_set_op(&entry->hdr.len_op, TCMU_OP_CMD); entry->hdr.cmd_id = tcmu_cmd->cmd_id; entry->hdr.kflags = 0;