From: Alexander Usyskin Date: Thu, 23 Dec 2021 09:47:05 +0000 (+0200) Subject: mei: cleanup status before client dma setup call X-Git-Tag: v6.1-rc5~2218^2~35 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=43aa323e315bec40779fe2899f7b531773d7b733;p=platform%2Fkernel%2Flinux-starfive.git mei: cleanup status before client dma setup call The upper layer may retry call to mei_cl_dma_alloc_and_map(), in that case the client status may be non-zero after the previous call and the wait condition will be true immediately. Set cl->status to zero to allow waiting for an actual result from the firmware. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Link: https://lore.kernel.org/r/20211223094705.204624-2-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index 96f4e59..22be86a 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -2327,6 +2327,8 @@ int mei_cl_dma_alloc_and_map(struct mei_cl *cl, const struct file *fp, list_move_tail(&cb->list, &dev->ctrl_rd_list); } + cl->status = 0; + mutex_unlock(&dev->device_lock); wait_event_timeout(cl->wait, cl->dma_mapped || cl->status, @@ -2404,6 +2406,8 @@ int mei_cl_dma_unmap(struct mei_cl *cl, const struct file *fp) list_move_tail(&cb->list, &dev->ctrl_rd_list); } + cl->status = 0; + mutex_unlock(&dev->device_lock); wait_event_timeout(cl->wait, !cl->dma_mapped || cl->status,