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authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2020-11-24 09:33:18 +0800
committerVinod Koul <vkoul@kernel.org>2020-11-25 10:32:26 +0530
commit47b8520997a8ec4a1d2b322c61b59ebe078764a9 (patch)
tree78e71d36414ed2b8ad0edd963ba6e7cfc21c7b73 /drivers/soundwire/bus.c
parentb35991de7a59a06a4ea5aee90b4926f01a72f71b (diff)
downloadlwn-47b8520997a8ec4a1d2b322c61b59ebe078764a9.tar.gz
lwn-47b8520997a8ec4a1d2b322c61b59ebe078764a9.zip
soundwire: bus: only clear valid DPN interrupts
Mirror the changes made for DP0 and don't modify reserved fields. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com> Link: https://lore.kernel.org/r/20201124013318.8963-6-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire/bus.c')
-rw-r--r--drivers/soundwire/bus.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c
index f66a804f9b74..d1e8c3a54976 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -1353,7 +1353,7 @@ static int sdw_handle_dp0_interrupt(struct sdw_slave *slave, u8 *slave_status)
static int sdw_handle_port_interrupt(struct sdw_slave *slave,
int port, u8 *slave_status)
{
- u8 clear = 0, impl_int_mask;
+ u8 clear, impl_int_mask;
int status, status2, ret, count = 0;
u32 addr;
@@ -1370,6 +1370,8 @@ static int sdw_handle_port_interrupt(struct sdw_slave *slave,
}
do {
+ clear = status & ~SDW_DPN_INTERRUPTS;
+
if (status & SDW_DPN_INT_TEST_FAIL) {
dev_err(&slave->dev, "Test fail for port:%d\n", port);
clear |= SDW_DPN_INT_TEST_FAIL;
@@ -1392,7 +1394,7 @@ static int sdw_handle_port_interrupt(struct sdw_slave *slave,
*slave_status = clear;
}
- /* clear the interrupt */
+ /* clear the interrupt but don't touch reserved fields */
ret = sdw_write(slave, addr, clear);
if (ret < 0) {
dev_err(slave->bus->dev,
@@ -1413,7 +1415,7 @@ static int sdw_handle_port_interrupt(struct sdw_slave *slave,
count++;
/* we can get alerts while processing so keep retrying */
- } while (status != 0 && count < SDW_READ_INTR_CLEAR_RETRY);
+ } while ((status & SDW_DPN_INTERRUPTS) && (count < SDW_READ_INTR_CLEAR_RETRY));
if (count == SDW_READ_INTR_CLEAR_RETRY)
dev_warn(slave->bus->dev, "Reached MAX_RETRY on port read");