From ceea5e2d9dc2334c6a4b167b6134f5cd740b8e0b Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Sun, 26 Jan 2014 15:55:57 -0300 Subject: [PATCH] [media] drx-j: use the proper timeout code on scu_command Checking if a time is after another one can have issues, as times are generally u32 wide. Use the proper macros for that at scu_command(). It should be noticed that other places also use jiffies calculus on an improper way. This should be fixed too, but the logic there is more complex. So, let's do it in separate patches. Acked-by: Devin Heitmueller Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/drx39xyj/drxj.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/media/dvb-frontends/drx39xyj/drxj.c b/drivers/media/dvb-frontends/drx39xyj/drxj.c index b1a7dfeec489..c843d8f4a96a 100644 --- a/drivers/media/dvb-frontends/drx39xyj/drxj.c +++ b/drivers/media/dvb-frontends/drx39xyj/drxj.c @@ -4417,8 +4417,8 @@ rw_error: static int scu_command(struct i2c_device_addr *dev_addr, struct drxjscu_cmd *cmd) { int rc; - u32 start_time = 0; u16 cur_cmd = 0; + unsigned long timeout; /* Check param */ if (cmd == NULL) @@ -4478,15 +4478,17 @@ static int scu_command(struct i2c_device_addr *dev_addr, struct drxjscu_cmd *cmd } /* Wait until SCU has processed command */ - start_time = jiffies_to_msecs(jiffies); - do { + timeout = jiffies + msecs_to_jiffies(DRXJ_MAX_WAITTIME); + while (time_is_after_jiffies(timeout)) { rc = DRXJ_DAP.read_reg16func(dev_addr, SCU_RAM_COMMAND__A, &cur_cmd, 0); if (rc != 0) { pr_err("error %d\n", rc); goto rw_error; } - } while (!(cur_cmd == DRX_SCU_READY) - && ((jiffies_to_msecs(jiffies) - start_time) < DRXJ_MAX_WAITTIME)); + if (cur_cmd == DRX_SCU_READY) + break; + usleep_range(1000, 2000); + } if (cur_cmd != DRX_SCU_READY) return -EIO; -- 2.20.1