[PATCH V4 2/8] i3c: master: svc: fix atomic issue

Clark Wang
2021-08-09T06:36:19Z

do_daa_locked() function is in a spin lock environment, use
readl_poll_timeout_atomic() to replace the origin
readl_poll_timeout().

Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Jun Li <jun.li@nxp.com>
---
V3/V4: No change.
V2: align the parameters of the function.
---
drivers/i3c/master/svc-i3c-master.c | 26 +++++++++++++++-----------
1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index c25a372f6820..47c02a60cf62 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -656,8 +656,10 @@ static int svc_i3c_master_readb(struct svc_i3c_master *master, u8 *dst,
u32 reg;

for (i = 0; i < len; i++) {
- ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
- SVC_I3C_MSTATUS_RXPEND(reg), 0, 1000);
+ ret = readl_poll_timeout_atomic(master->regs + SVC_I3C_MSTATUS,
+ reg,
+ SVC_I3C_MSTATUS_RXPEND(reg),
+ 0, 1000);
if (ret)
return ret;

@@ -687,10 +689,11 @@ static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master,
* Either one slave will send its ID, or the assignment process
* is done.
*/
- ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
- SVC_I3C_MSTATUS_RXPEND(reg) |
- SVC_I3C_MSTATUS_MCTRLDONE(reg),
- 1, 1000);
+ ret = readl_poll_timeout_atomic(master->regs + SVC_I3C_MSTATUS,
+ reg,
+ SVC_I3C_MSTATUS_RXPEND(reg) |
+ SVC_I3C_MSTATUS_MCTRLDONE(reg),
+ 1, 1000);
if (ret)
return ret;

@@ -744,11 +747,12 @@ static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master,
}

/* Wait for the slave to be ready to receive its address */
- ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
- SVC_I3C_MSTATUS_MCTRLDONE(reg) &&
- SVC_I3C_MSTATUS_STATE_DAA(reg) &&
- SVC_I3C_MSTATUS_BETWEEN(reg),
- 0, 1000);
+ ret = readl_poll_timeout_atomic(master->regs + SVC_I3C_MSTATUS,
+ reg,
+ SVC_I3C_MSTATUS_MCTRLDONE(reg) &&
+ SVC_I3C_MSTATUS_STATE_DAA(reg) &&
+ SVC_I3C_MSTATUS_BETWEEN(reg),
+ 0, 1000);
if (ret)
return ret;

--
2.25.1