diff options
| author | Clark Wang <xiaoning.wang@nxp.com> | 2023-05-17 06:30:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-19 17:21:54 +0300 |
| commit | 76efcb6cdaf94650fdb11a1dd851592de132fea0 (patch) | |
| tree | de18cff7ff8e1d2cf39e8fa3432d121415df0bfc /drivers/i3c | |
| parent | c0ed8b804934a9b8ecb245617b6988fd6482c422 (diff) | |
| download | linux-76efcb6cdaf94650fdb11a1dd851592de132fea0.tar.xz | |
i3c: master: svc: fix cpu schedule in spin lock
[ Upstream commit 33beadb3b1ab74e69db2c49d9663f3a93a273943 ]
pm_runtime_resume_and_get() may call sleep(). It cannot be used in
svc_i3c_master_start_xfer_locked(), because it is in a spin lock.
Move the pm runtime operations to svc_i3c_master_enqueue_xfer().
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Fixes: 05be23ef78f7 ("i3c: master: svc: add runtime pm support")
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20230517033030.3068085-2-xiaoning.wang@nxp.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/i3c')
| -rw-r--r-- | drivers/i3c/master/svc-i3c-master.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c index d6e9ed74cdcf..d47360f8a1f3 100644 --- a/drivers/i3c/master/svc-i3c-master.c +++ b/drivers/i3c/master/svc-i3c-master.c @@ -1090,12 +1090,6 @@ static void svc_i3c_master_start_xfer_locked(struct svc_i3c_master *master) if (!xfer) return; - ret = pm_runtime_resume_and_get(master->dev); - if (ret < 0) { - dev_err(master->dev, "<%s> Cannot get runtime PM.\n", __func__); - return; - } - svc_i3c_master_clear_merrwarn(master); svc_i3c_master_flush_fifo(master); @@ -1110,9 +1104,6 @@ static void svc_i3c_master_start_xfer_locked(struct svc_i3c_master *master) break; } - pm_runtime_mark_last_busy(master->dev); - pm_runtime_put_autosuspend(master->dev); - xfer->ret = ret; complete(&xfer->comp); @@ -1133,6 +1124,13 @@ static void svc_i3c_master_enqueue_xfer(struct svc_i3c_master *master, struct svc_i3c_xfer *xfer) { unsigned long flags; + int ret; + + ret = pm_runtime_resume_and_get(master->dev); + if (ret < 0) { + dev_err(master->dev, "<%s> Cannot get runtime PM.\n", __func__); + return; + } init_completion(&xfer->comp); spin_lock_irqsave(&master->xferqueue.lock, flags); @@ -1143,6 +1141,9 @@ static void svc_i3c_master_enqueue_xfer(struct svc_i3c_master *master, svc_i3c_master_start_xfer_locked(master); } spin_unlock_irqrestore(&master->xferqueue.lock, flags); + + pm_runtime_mark_last_busy(master->dev); + pm_runtime_put_autosuspend(master->dev); } static bool |