From: Kai-Heng Feng <kai.heng.feng@canonical.com> To: ajayg@nvidia.com Cc: Kai-Heng Feng <kai.heng.feng@canonical.com>, Wolfram Sang <wsa@the-dreams.de>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, linux-i2c@vger.kernel.org (open list:I2C CONTROLLER DRIVER FOR NVIDIA GPU), linux-kernel@vger.kernel.org (open list) Subject: [PATCH] i2c: nvidia-gpu: Handle timeout correctly in gpu_i2c_check_status() Date: Thu, 12 Mar 2020 00:58:06 +0800 [thread overview] Message-ID: <20200311165806.12365-1-kai.heng.feng@canonical.com> (raw) Nvidia card may come with a "phantom" UCSI device, and its driver gets stuck in probe routine, prevents any system PM operations like suspend. Let's handle the unaccounted case that the target time equals to jiffies in gpu_i2c_check_status(), so the UCSI driver can let the probe fail as it should. Fixes: c71bcdcb42a7 ("i2c: add i2c bus driver for NVIDIA GPU") Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> --- drivers/i2c/busses/i2c-nvidia-gpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-nvidia-gpu.c b/drivers/i2c/busses/i2c-nvidia-gpu.c index 62e18b4db0ed..1988e93c7925 100644 --- a/drivers/i2c/busses/i2c-nvidia-gpu.c +++ b/drivers/i2c/busses/i2c-nvidia-gpu.c @@ -88,7 +88,7 @@ static int gpu_i2c_check_status(struct gpu_i2c_dev *i2cd) usleep_range(500, 600); } while (time_is_after_jiffies(target)); - if (time_is_before_jiffies(target)) { + if (time_is_before_eq_jiffies(target)) { dev_err(i2cd->dev, "i2c timeout error %x\n", val); return -ETIMEDOUT; } -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Kai-Heng Feng <kai.heng.feng@canonical.com> To: ajayg@nvidia.com Cc: Kai-Heng Feng <kai.heng.feng@canonical.com>, Wolfram Sang <wsa@the-dreams.de>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, "open list:I2C CONTROLLER DRIVER FOR NVIDIA GPU" <linux-i2c@vger.kernel.org>, open list <linux-kernel@vger.kernel.org> Subject: [PATCH] i2c: nvidia-gpu: Handle timeout correctly in gpu_i2c_check_status() Date: Thu, 12 Mar 2020 00:58:06 +0800 [thread overview] Message-ID: <20200311165806.12365-1-kai.heng.feng@canonical.com> (raw) Nvidia card may come with a "phantom" UCSI device, and its driver gets stuck in probe routine, prevents any system PM operations like suspend. Let's handle the unaccounted case that the target time equals to jiffies in gpu_i2c_check_status(), so the UCSI driver can let the probe fail as it should. Fixes: c71bcdcb42a7 ("i2c: add i2c bus driver for NVIDIA GPU") Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> --- drivers/i2c/busses/i2c-nvidia-gpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-nvidia-gpu.c b/drivers/i2c/busses/i2c-nvidia-gpu.c index 62e18b4db0ed..1988e93c7925 100644 --- a/drivers/i2c/busses/i2c-nvidia-gpu.c +++ b/drivers/i2c/busses/i2c-nvidia-gpu.c @@ -88,7 +88,7 @@ static int gpu_i2c_check_status(struct gpu_i2c_dev *i2cd) usleep_range(500, 600); } while (time_is_after_jiffies(target)); - if (time_is_before_jiffies(target)) { + if (time_is_before_eq_jiffies(target)) { dev_err(i2cd->dev, "i2c timeout error %x\n", val); return -ETIMEDOUT; } -- 2.17.1
next reply other threads:[~2020-03-11 16:58 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-03-11 16:58 Kai-Heng Feng [this message] 2020-03-11 16:58 ` [PATCH] i2c: nvidia-gpu: Handle timeout correctly in gpu_i2c_check_status() Kai-Heng Feng 2020-03-23 5:38 ` Kai-Heng Feng 2020-03-23 5:38 ` Kai-Heng Feng 2020-03-23 16:47 ` Ajay Gupta 2020-03-23 16:47 ` Ajay Gupta 2020-03-23 17:20 ` Kai-Heng Feng 2020-03-23 17:20 ` Kai-Heng Feng 2020-03-24 3:51 ` Ajay Gupta 2020-03-24 3:51 ` Ajay Gupta 2020-03-24 11:09 ` Wolfram Sang 2020-03-24 11:09 ` Wolfram Sang 2020-03-24 11:12 ` Kai-Heng Feng 2020-03-24 11:12 ` Kai-Heng Feng
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