Hi,
On 08-01-17 16:27, Andy Shevchenko wrote:
On Sun, 2017-01-08 at 14:44 +0100, Hans de Goede wrote:
Take the punit lock to stop others from accessing the punit while the
pmic i2c bus is in use. This is necessary because accessing the punit
from the kernel may result in the punit trying to access the pmic i2c
bus, which results in a hang when it happens while we own the pmic i2c
bus semaphore.
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=155241
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Tested-by: tagorereddy <tagore.chandan@xxxxxxxxx>
---
drivers/i2c/busses/i2c-designware-baytrail.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/i2c/busses/i2c-designware-baytrail.c
b/drivers/i2c/busses/i2c-designware-baytrail.c
index 3effc9a..cf7a2a0 100644
--- a/drivers/i2c/busses/i2c-designware-baytrail.c
+++ b/drivers/i2c/busses/i2c-designware-baytrail.c
@@ -62,6 +62,8 @@ static void reset_semaphore(struct dw_i2c_dev *dev)
+ iosf_mbi_punit_unlock();
@@ -79,6 +81,8 @@ static int baytrail_i2c_acquire(struct dw_i2c_dev
+ iosf_mbi_punit_lock();
For me it looks a bit asymmetrical.
Can we use acquire()/release()?
Sure I can change things to use acquire()/release() instead. I will
change this for v2.
Regards,
Hans
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