Use time_*() macros instead of using
jiffies directly to handle overflow issues.

Fixes: cc1aeedb98ad ("drm/imagination: Implement firmware infrastructure and META FW support")
Signed-off-by: Chen Yufan <chenyufan@vivo.com>
---
The modifications made compared to the previous version are as follows:
1. Change the prefix of subject.
2. Correct fixes.
3. Drop the cast of RESERVE_SLOT_TIMEOUT.
---
 drivers/gpu/drm/imagination/pvr_ccb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/imagination/pvr_ccb.c b/drivers/gpu/drm/imagination/pvr_ccb.c
index 4deeac7ed40a..b7d5f9ca3ca6 100644
--- a/drivers/gpu/drm/imagination/pvr_ccb.c
+++ b/drivers/gpu/drm/imagination/pvr_ccb.c
@@ -321,7 +321,7 @@ static int pvr_kccb_reserve_slot_sync(struct pvr_device *pvr_dev)
 	bool reserved = false;
 	u32 retries = 0;
 
-	while ((jiffies - start_timestamp) < (u32)RESERVE_SLOT_TIMEOUT ||
+	while (time_before(jiffies, start_timestamp + RESERVE_SLOT_TIMEOUT) ||
 	       retries < RESERVE_SLOT_MIN_RETRIES) {
 		reserved = pvr_kccb_try_reserve_slot(pvr_dev);
 		if (reserved)
-- 
2.39.0

On 23/08/2024 10:39, Chen Yufan wrote:
> Use time_*() macros instead of using
> jiffies directly to handle overflow issues.
> 
> Fixes: cc1aeedb98ad ("drm/imagination: Implement firmware infrastructure and META FW support")
> Signed-off-by: Chen Yufan <chenyufan@vivo.com>

Hi Chen,

Apologies for the slow reply – it's been a busy week for me.

I've added my R-b and applied your patch to drm-misc-next as:

   7a5115ba1d69 ("drm/imagination: Convert to use time_before macro")

Thanks again!

Matt

> ---
> The modifications made compared to the previous version are as follows:
> 1. Change the prefix of subject.
> 2. Correct fixes.
> 3. Drop the cast of RESERVE_SLOT_TIMEOUT.
> ---
>   drivers/gpu/drm/imagination/pvr_ccb.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/imagination/pvr_ccb.c b/drivers/gpu/drm/imagination/pvr_ccb.c
> index 4deeac7ed40a..b7d5f9ca3ca6 100644
> --- a/drivers/gpu/drm/imagination/pvr_ccb.c
> +++ b/drivers/gpu/drm/imagination/pvr_ccb.c
> @@ -321,7 +321,7 @@ static int pvr_kccb_reserve_slot_sync(struct pvr_device *pvr_dev)
>   	bool reserved = false;
>   	u32 retries = 0;
>   
> -	while ((jiffies - start_timestamp) < (u32)RESERVE_SLOT_TIMEOUT ||
> +	while (time_before(jiffies, start_timestamp + RESERVE_SLOT_TIMEOUT) ||
>   	       retries < RESERVE_SLOT_MIN_RETRIES) {
>   		reserved = pvr_kccb_try_reserve_slot(pvr_dev);
>   		if (reserved)