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| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2024-02-19 22:58:06 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-03-05 17:28:22 +0300 |
| commit | b8b19acfafdeacbedd4e2795cb18c81c4d8bb6cc (patch) | |
| tree | f75c2d670e8eaba3f37ba4fe3afd2f48dd4050c0 /drivers/misc/mei | |
| parent | 058a38acba15fd8e7b262ec6e17c4204cb15f984 (diff) | |
| download | linux-b8b19acfafdeacbedd4e2795cb18c81c4d8bb6cc.tar.xz | |
mei: vsc: Don't use sleeping condition in wait_event_timeout()
vsc_tp_wakeup_request() called wait_event_timeout() with
gpiod_get_value_cansleep() which may sleep, and does so as the
implementation is that of gpio-ljca.
Move the GPIO state check outside the call.
Fixes: 566f5ca97680 ("mei: Add transport driver for IVSC device")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-and-Reviewed-by: Wentong Wu <wentong.wu@intel.com>
Link: https://lore.kernel.org/r/20240219195807.517742-3-sakari.ailus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei')
| -rw-r--r-- | drivers/misc/mei/vsc-tp.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/misc/mei/vsc-tp.c b/drivers/misc/mei/vsc-tp.c index 2b69ada9349e..7b678005652b 100644 --- a/drivers/misc/mei/vsc-tp.c +++ b/drivers/misc/mei/vsc-tp.c @@ -25,7 +25,8 @@ #define VSC_TP_ROM_BOOTUP_DELAY_MS 10 #define VSC_TP_ROM_XFER_POLL_TIMEOUT_US (500 * USEC_PER_MSEC) #define VSC_TP_ROM_XFER_POLL_DELAY_US (20 * USEC_PER_MSEC) -#define VSC_TP_WAIT_FW_ASSERTED_TIMEOUT (2 * HZ) +#define VSC_TP_WAIT_FW_POLL_TIMEOUT (2 * HZ) +#define VSC_TP_WAIT_FW_POLL_DELAY_US (20 * USEC_PER_MSEC) #define VSC_TP_MAX_XFER_COUNT 5 #define VSC_TP_PACKET_SYNC 0x31 @@ -101,13 +102,15 @@ static int vsc_tp_wakeup_request(struct vsc_tp *tp) gpiod_set_value_cansleep(tp->wakeupfw, 0); ret = wait_event_timeout(tp->xfer_wait, - atomic_read(&tp->assert_cnt) && - gpiod_get_value_cansleep(tp->wakeuphost), - VSC_TP_WAIT_FW_ASSERTED_TIMEOUT); + atomic_read(&tp->assert_cnt), + VSC_TP_WAIT_FW_POLL_TIMEOUT); if (!ret) return -ETIMEDOUT; - return 0; + return read_poll_timeout(gpiod_get_value_cansleep, ret, ret, + VSC_TP_WAIT_FW_POLL_DELAY_US, + VSC_TP_WAIT_FW_POLL_TIMEOUT, false, + tp->wakeuphost); } static void vsc_tp_wakeup_release(struct vsc_tp *tp) |