On Wed, Nov 11, 2020 at 11:47:48AM +0100, Christophe JAILLET wrote: > Le 11/11/2020 à 05:55, Nigel Christian a écrit : > > Replace symbolic permissions with octal values. Use usleep_range > > for small msec values due to the fact that msleep() less than > > 20ms may have unexpected behavior/sleep longer. > > > > - https://lkml.org/lkml/2016/8/2/1945 > > - Documentation/timers/timers-howto.rst > > > > Signed-off-by: Nigel Christian <nigel.l.christian@xxxxxxxxx> > > --- > > drivers/bluetooth/hci_qca.c | 8 ++++---- > > 1 file changed, 4 insertions(+), 4 deletions(-) > > > > diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c > > index 2d3f1f179a1e..039fb117bd8f 100644 > > --- a/drivers/bluetooth/hci_qca.c > > +++ b/drivers/bluetooth/hci_qca.c > > @@ -631,7 +631,7 @@ static void qca_debugfs_init(struct hci_dev *hdev) > > ibs_dir = debugfs_create_dir("ibs", hdev->debugfs); > > /* read only */ > > - mode = S_IRUGO; > > + mode = 0444; > > debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state); > > debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state); > > debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir, > > @@ -658,7 +658,7 @@ static void qca_debugfs_init(struct hci_dev *hdev) > > debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms); > > /* read/write */ > > - mode = S_IRUGO | S_IWUSR; > > + mode = 0644; > > debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans); > > debugfs_create_u32("tx_idle_delay", mode, ibs_dir, > > &qca->tx_idle_delay); > > @@ -1302,7 +1302,7 @@ static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate) > > /* Give the controller time to process the request */ > > if (qca_is_wcn399x(qca_soc_type(hu))) > > - msleep(10); > > + usleep_range(1000, 10000); > This... > > else > > msleep(300); > > @@ -1350,7 +1350,7 @@ static int qca_send_power_pulse(struct hci_uart *hu, bool on) > > if (on) > > msleep(100); > > else > > - msleep(10); > > + usleep_range(1000, 10000); > and this change change a delay which is expected to be 10 ms, and will > likely be ~20 ms, into a delay which can be down to 1 ms. > Is it intended or tested? > > I've not looked at the datasheet, but it looks spurious. > > Just my 2c. > > CJ > > > return 0; > > } > > > I see, so usleep_range(10000, 11000) so that the 10ms minimum is maintained closer to the intended delay? Testing with info below: Pixel 3a bluetooth tether TOZO-T10-R bluetooth earbuds Fedora 33 Kernel version = 5.10.0-rc3-next-20201110 System = ASUSTeK COMPUTER INC. 1.0 UX330UAK BIOS = UX330UAK.302 Boot mode = UEFI CPU model = Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz dmesg -t -k > Bluetooth: Core ver 2.22 Bluetooth: HCI device and connection manager initialized Bluetooth: HCI socket layer initialized Bluetooth: L2CAP socket layer initialized Bluetooth: SCO socket layer initialized Bluetooth: hci0: Firmware revision 0.0 build 10 week 41 2018 Bluetooth: BNEP (Ethernet Emulation) ver 1.3 Bluetooth: BNEP filters: protocol multicast Bluetooth: BNEP socket layer initialized Bluetooth: RFCOMM TTY layer initialized Bluetooth: RFCOMM socket layer initialized Bluetooth: RFCOMM ver 1.11
