* [PATCH] drm/amdgpu: replace mutex with spin_lock
@ 2018-05-30 10:19 Shirish S
[not found] ` <1527675594-24143-1-git-send-email-shirish.s-5C7GfCeVMHo@public.gmane.org>
0 siblings, 1 reply; 5+ messages in thread
From: Shirish S @ 2018-05-30 10:19 UTC (permalink / raw)
To: amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
Harry.Wentland-5C7GfCeVMHo, Rex.Zhu-5C7GfCeVMHo
Cc: Shirish S
mutex's lead to sleeps which should be avoided in
atomic context.
Hence this patch replaces it with the spin_locks.
Signed-off-by: Shirish S <shirish.s@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 2 +-
drivers/gpu/drm/amd/amdgpu/atom.c | 4 ++--
drivers/gpu/drm/amd/amdgpu/atom.h | 3 ++-
3 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index bf872f6..ba3d4b9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -2033,7 +2033,7 @@ int amdgpu_atombios_init(struct amdgpu_device *adev)
return -ENOMEM;
}
- mutex_init(&adev->mode_info.atom_context->mutex);
+ spin_lock_init(&adev->mode_info.atom_context->lock);
if (adev->is_atom_fw) {
amdgpu_atomfirmware_scratch_regs_init(adev);
amdgpu_atomfirmware_allocate_fb_scratch(adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/atom.c b/drivers/gpu/drm/amd/amdgpu/atom.c
index 69500a8..bfd98f0 100644
--- a/drivers/gpu/drm/amd/amdgpu/atom.c
+++ b/drivers/gpu/drm/amd/amdgpu/atom.c
@@ -1261,7 +1261,7 @@ int amdgpu_atom_execute_table(struct atom_context *ctx, int index, uint32_t * pa
{
int r;
- mutex_lock(&ctx->mutex);
+ spin_lock(&ctx->lock);
/* reset data block */
ctx->data_block = 0;
/* reset reg block */
@@ -1274,7 +1274,7 @@ int amdgpu_atom_execute_table(struct atom_context *ctx, int index, uint32_t * pa
ctx->divmul[0] = 0;
ctx->divmul[1] = 0;
r = amdgpu_atom_execute_table_locked(ctx, index, params);
- mutex_unlock(&ctx->mutex);
+ spin_unlock(&ctx->lock);
return r;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/atom.h b/drivers/gpu/drm/amd/amdgpu/atom.h
index a391709..cdfb0d0 100644
--- a/drivers/gpu/drm/amd/amdgpu/atom.h
+++ b/drivers/gpu/drm/amd/amdgpu/atom.h
@@ -26,6 +26,7 @@
#define ATOM_H
#include <linux/types.h>
+#include <linux/spinlock_types.h>
#include <drm/drmP.h>
#define ATOM_BIOS_MAGIC 0xAA55
@@ -125,7 +126,7 @@ struct card_info {
struct atom_context {
struct card_info *card;
- struct mutex mutex;
+ spinlock_t lock;
void *bios;
uint32_t cmd_table, data_table;
uint16_t *iio;
--
2.7.4
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
^ permalink raw reply related [flat|nested] 5+ messages in thread
* RE: [PATCH] drm/amdgpu: replace mutex with spin_lock
[not found] ` <1527675594-24143-1-git-send-email-shirish.s-5C7GfCeVMHo@public.gmane.org>
@ 2018-05-30 15:21 ` Deucher, Alexander
[not found] ` <BN6PR12MB1809BB86BD60CB77FB5A7BADF76C0-/b2+HYfkarSEx6ez0IUAagdYzm3356FpvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2018-05-30 15:40 ` Christian König
1 sibling, 1 reply; 5+ messages in thread
From: Deucher, Alexander @ 2018-05-30 15:21 UTC (permalink / raw)
To: amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW, Wentland, Harry, Zhu, Rex
Cc: S, Shirish
> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-bounces@lists.freedesktop.org] On Behalf
> Of Shirish S
> Sent: Wednesday, May 30, 2018 6:20 AM
> To: amd-gfx@lists.freedesktop.org; Wentland, Harry
> <Harry.Wentland@amd.com>; Zhu, Rex <Rex.Zhu@amd.com>
> Cc: S, Shirish <Shirish.S@amd.com>
> Subject: [PATCH] drm/amdgpu: replace mutex with spin_lock
>
> mutex's lead to sleeps which should be avoided in atomic context.
> Hence this patch replaces it with the spin_locks.
>
> Signed-off-by: Shirish S <shirish.s@amd.com>
Does this actually fix a bug or is it just to be safe? Do actually call atom command tables in an atomic context?
Alex
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/atom.c | 4 ++--
> drivers/gpu/drm/amd/amdgpu/atom.h | 3 ++-
> 3 files changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
> index bf872f6..ba3d4b9 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
> @@ -2033,7 +2033,7 @@ int amdgpu_atombios_init(struct amdgpu_device
> *adev)
> return -ENOMEM;
> }
>
> - mutex_init(&adev->mode_info.atom_context->mutex);
> + spin_lock_init(&adev->mode_info.atom_context->lock);
> if (adev->is_atom_fw) {
> amdgpu_atomfirmware_scratch_regs_init(adev);
> amdgpu_atomfirmware_allocate_fb_scratch(adev);
> diff --git a/drivers/gpu/drm/amd/amdgpu/atom.c
> b/drivers/gpu/drm/amd/amdgpu/atom.c
> index 69500a8..bfd98f0 100644
> --- a/drivers/gpu/drm/amd/amdgpu/atom.c
> +++ b/drivers/gpu/drm/amd/amdgpu/atom.c
> @@ -1261,7 +1261,7 @@ int amdgpu_atom_execute_table(struct
> atom_context *ctx, int index, uint32_t * pa {
> int r;
>
> - mutex_lock(&ctx->mutex);
> + spin_lock(&ctx->lock);
> /* reset data block */
> ctx->data_block = 0;
> /* reset reg block */
> @@ -1274,7 +1274,7 @@ int amdgpu_atom_execute_table(struct
> atom_context *ctx, int index, uint32_t * pa
> ctx->divmul[0] = 0;
> ctx->divmul[1] = 0;
> r = amdgpu_atom_execute_table_locked(ctx, index, params);
> - mutex_unlock(&ctx->mutex);
> + spin_unlock(&ctx->lock);
> return r;
> }
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/atom.h
> b/drivers/gpu/drm/amd/amdgpu/atom.h
> index a391709..cdfb0d0 100644
> --- a/drivers/gpu/drm/amd/amdgpu/atom.h
> +++ b/drivers/gpu/drm/amd/amdgpu/atom.h
> @@ -26,6 +26,7 @@
> #define ATOM_H
>
> #include <linux/types.h>
> +#include <linux/spinlock_types.h>
> #include <drm/drmP.h>
>
> #define ATOM_BIOS_MAGIC 0xAA55
> @@ -125,7 +126,7 @@ struct card_info {
>
> struct atom_context {
> struct card_info *card;
> - struct mutex mutex;
> + spinlock_t lock;
> void *bios;
> uint32_t cmd_table, data_table;
> uint16_t *iio;
> --
> 2.7.4
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] drm/amdgpu: replace mutex with spin_lock
[not found] ` <1527675594-24143-1-git-send-email-shirish.s-5C7GfCeVMHo@public.gmane.org>
2018-05-30 15:21 ` Deucher, Alexander
@ 2018-05-30 15:40 ` Christian König
[not found] ` <753dc27e-dfd1-ee0c-e592-2883a8110dfe-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
1 sibling, 1 reply; 5+ messages in thread
From: Christian König @ 2018-05-30 15:40 UTC (permalink / raw)
To: Shirish S, amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
Harry.Wentland-5C7GfCeVMHo, Rex.Zhu-5C7GfCeVMHo
Keep in mind that under SRIOV you can read registers while in atomic
context, e.g. while holding a spinlock.
Please double check if that won't bite us.
Apart from that the change looks good to me,
Christian.
Am 30.05.2018 um 12:19 schrieb Shirish S:
> mutex's lead to sleeps which should be avoided in
> atomic context.
> Hence this patch replaces it with the spin_locks.
>
> Signed-off-by: Shirish S <shirish.s@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/atom.c | 4 ++--
> drivers/gpu/drm/amd/amdgpu/atom.h | 3 ++-
> 3 files changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
> index bf872f6..ba3d4b9 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
> @@ -2033,7 +2033,7 @@ int amdgpu_atombios_init(struct amdgpu_device *adev)
> return -ENOMEM;
> }
>
> - mutex_init(&adev->mode_info.atom_context->mutex);
> + spin_lock_init(&adev->mode_info.atom_context->lock);
> if (adev->is_atom_fw) {
> amdgpu_atomfirmware_scratch_regs_init(adev);
> amdgpu_atomfirmware_allocate_fb_scratch(adev);
> diff --git a/drivers/gpu/drm/amd/amdgpu/atom.c b/drivers/gpu/drm/amd/amdgpu/atom.c
> index 69500a8..bfd98f0 100644
> --- a/drivers/gpu/drm/amd/amdgpu/atom.c
> +++ b/drivers/gpu/drm/amd/amdgpu/atom.c
> @@ -1261,7 +1261,7 @@ int amdgpu_atom_execute_table(struct atom_context *ctx, int index, uint32_t * pa
> {
> int r;
>
> - mutex_lock(&ctx->mutex);
> + spin_lock(&ctx->lock);
> /* reset data block */
> ctx->data_block = 0;
> /* reset reg block */
> @@ -1274,7 +1274,7 @@ int amdgpu_atom_execute_table(struct atom_context *ctx, int index, uint32_t * pa
> ctx->divmul[0] = 0;
> ctx->divmul[1] = 0;
> r = amdgpu_atom_execute_table_locked(ctx, index, params);
> - mutex_unlock(&ctx->mutex);
> + spin_unlock(&ctx->lock);
> return r;
> }
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/atom.h b/drivers/gpu/drm/amd/amdgpu/atom.h
> index a391709..cdfb0d0 100644
> --- a/drivers/gpu/drm/amd/amdgpu/atom.h
> +++ b/drivers/gpu/drm/amd/amdgpu/atom.h
> @@ -26,6 +26,7 @@
> #define ATOM_H
>
> #include <linux/types.h>
> +#include <linux/spinlock_types.h>
> #include <drm/drmP.h>
>
> #define ATOM_BIOS_MAGIC 0xAA55
> @@ -125,7 +126,7 @@ struct card_info {
>
> struct atom_context {
> struct card_info *card;
> - struct mutex mutex;
> + spinlock_t lock;
> void *bios;
> uint32_t cmd_table, data_table;
> uint16_t *iio;
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] drm/amdgpu: replace mutex with spin_lock
[not found] ` <BN6PR12MB1809BB86BD60CB77FB5A7BADF76C0-/b2+HYfkarSEx6ez0IUAagdYzm3356FpvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
@ 2018-05-31 9:56 ` S, Shirish
0 siblings, 0 replies; 5+ messages in thread
From: S, Shirish @ 2018-05-31 9:56 UTC (permalink / raw)
To: Deucher, Alexander, S, Shirish,
amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW, Wentland, Harry, Zhu,
Rex
[-- Attachment #1.1: Type: text/plain, Size: 4510 bytes --]
On 5/30/2018 8:51 PM, Deucher, Alexander wrote:
>> -----Original Message-----
>> From: amd-gfx [mailto:amd-gfx-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org] On Behalf
>> Of Shirish S
>> Sent: Wednesday, May 30, 2018 6:20 AM
>> To: amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org; Wentland, Harry
>> <Harry.Wentland-5C7GfCeVMHo@public.gmane.org>; Zhu, Rex <Rex.Zhu-5C7GfCeVMHo@public.gmane.org>
>> Cc: S, Shirish <Shirish.S-5C7GfCeVMHo@public.gmane.org>
>> Subject: [PATCH] drm/amdgpu: replace mutex with spin_lock
>>
>> mutex's lead to sleeps which should be avoided in atomic context.
>> Hence this patch replaces it with the spin_locks.
>>
>> Signed-off-by: Shirish S <shirish.s-5C7GfCeVMHo@public.gmane.org>
> Does this actually fix a bug or is it just to be safe? Do actually call atom command tables in an atomic context?
I have re-spun V2 patch, with the stack trace so that you can see the
path taken.
For reference below is the trace:
BUG: sleeping function called from invalid context at
kernel/locking/mutex.c:238
in_atomic(): 1, irqs_disabled(): 1, pid: 89, name: kworker/u4:3
CPU: 1 PID: 89 Comm: kworker/u4:3 Tainted: G W 4.14.43 #8
Workqueue: events_unbound commit_work
Call Trace:
dump_stack+0x4d/0x63
___might_sleep+0x11f/0x12e
mutex_lock+0x20/0x42
amdgpu_atom_execute_table+0x26/0x72
enable_disp_power_gating_v2_1+0x85/0xae
dce110_enable_display_power_gating+0x83/0x1b1
dce110_power_down_fe+0x4a/0x6d
dc_post_update_surfaces_to_stream+0x59/0x87
amdgpu_dm_do_flip+0x239/0x298
amdgpu_dm_commit_planes.isra.23+0x379/0x54b
? drm_calc_timestamping_constants+0x14b/0x15c
amdgpu_dm_atomic_commit_tail+0x4fc/0x5d2
? wait_for_common+0x5b/0x69
commit_tail+0x42/0x64
process_one_work+0x1b0/0x314
worker_thread+0x1cb/0x2c1
? create_worker+0x1da/0x1da
kthread+0x156/0x15e
? kthread_flush_work+0xea/0xea
ret_from_fork+0x22/0x40
Its caused when a BUG hit in the kernel.
Thanks & Regards,
Shirish S
> Alex
>
>> ---
>> drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 2 +-
>> drivers/gpu/drm/amd/amdgpu/atom.c | 4 ++--
>> drivers/gpu/drm/amd/amdgpu/atom.h | 3 ++-
>> 3 files changed, 5 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
>> index bf872f6..ba3d4b9 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
>> @@ -2033,7 +2033,7 @@ int amdgpu_atombios_init(struct amdgpu_device
>> *adev)
>> return -ENOMEM;
>> }
>>
>> - mutex_init(&adev->mode_info.atom_context->mutex);
>> + spin_lock_init(&adev->mode_info.atom_context->lock);
>> if (adev->is_atom_fw) {
>> amdgpu_atomfirmware_scratch_regs_init(adev);
>> amdgpu_atomfirmware_allocate_fb_scratch(adev);
>> diff --git a/drivers/gpu/drm/amd/amdgpu/atom.c
>> b/drivers/gpu/drm/amd/amdgpu/atom.c
>> index 69500a8..bfd98f0 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/atom.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/atom.c
>> @@ -1261,7 +1261,7 @@ int amdgpu_atom_execute_table(struct
>> atom_context *ctx, int index, uint32_t * pa {
>> int r;
>>
>> - mutex_lock(&ctx->mutex);
>> + spin_lock(&ctx->lock);
>> /* reset data block */
>> ctx->data_block = 0;
>> /* reset reg block */
>> @@ -1274,7 +1274,7 @@ int amdgpu_atom_execute_table(struct
>> atom_context *ctx, int index, uint32_t * pa
>> ctx->divmul[0] = 0;
>> ctx->divmul[1] = 0;
>> r = amdgpu_atom_execute_table_locked(ctx, index, params);
>> - mutex_unlock(&ctx->mutex);
>> + spin_unlock(&ctx->lock);
>> return r;
>> }
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/atom.h
>> b/drivers/gpu/drm/amd/amdgpu/atom.h
>> index a391709..cdfb0d0 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/atom.h
>> +++ b/drivers/gpu/drm/amd/amdgpu/atom.h
>> @@ -26,6 +26,7 @@
>> #define ATOM_H
>>
>> #include <linux/types.h>
>> +#include <linux/spinlock_types.h>
>> #include <drm/drmP.h>
>>
>> #define ATOM_BIOS_MAGIC 0xAA55
>> @@ -125,7 +126,7 @@ struct card_info {
>>
>> struct atom_context {
>> struct card_info *card;
>> - struct mutex mutex;
>> + spinlock_t lock;
>> void *bios;
>> uint32_t cmd_table, data_table;
>> uint16_t *iio;
>> --
>> 2.7.4
>>
>> _______________________________________________
>> amd-gfx mailing list
>> amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
--
Regards,
Shirish S
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_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] drm/amdgpu: replace mutex with spin_lock
[not found] ` <753dc27e-dfd1-ee0c-e592-2883a8110dfe-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
@ 2018-05-31 9:59 ` S, Shirish
0 siblings, 0 replies; 5+ messages in thread
From: S, Shirish @ 2018-05-31 9:59 UTC (permalink / raw)
To: christian.koenig-5C7GfCeVMHo, Shirish S,
amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
Harry.Wentland-5C7GfCeVMHo, Rex.Zhu-5C7GfCeVMHo
On 5/30/2018 9:10 PM, Christian König wrote:
> Keep in mind that under SRIOV you can read registers while in atomic
> context, e.g. while holding a spinlock.
>
> Please double check if that won't bite us.
>
> Apart from that the change looks good to me,
Thanks Christian, i verified boot, s3, s5 on Stoney with this patch.
Have re-spun V2 which has the exact trace in which scenario this BUG is hit.
Regards,
Shirish S
> Christian.
>
> Am 30.05.2018 um 12:19 schrieb Shirish S:
>> mutex's lead to sleeps which should be avoided in
>> atomic context.
>> Hence this patch replaces it with the spin_locks.
>>
>> Signed-off-by: Shirish S <shirish.s@amd.com>
>> ---
>> drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 2 +-
>> drivers/gpu/drm/amd/amdgpu/atom.c | 4 ++--
>> drivers/gpu/drm/amd/amdgpu/atom.h | 3 ++-
>> 3 files changed, 5 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
>> index bf872f6..ba3d4b9 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
>> @@ -2033,7 +2033,7 @@ int amdgpu_atombios_init(struct amdgpu_device
>> *adev)
>> return -ENOMEM;
>> }
>> - mutex_init(&adev->mode_info.atom_context->mutex);
>> + spin_lock_init(&adev->mode_info.atom_context->lock);
>> if (adev->is_atom_fw) {
>> amdgpu_atomfirmware_scratch_regs_init(adev);
>> amdgpu_atomfirmware_allocate_fb_scratch(adev);
>> diff --git a/drivers/gpu/drm/amd/amdgpu/atom.c
>> b/drivers/gpu/drm/amd/amdgpu/atom.c
>> index 69500a8..bfd98f0 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/atom.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/atom.c
>> @@ -1261,7 +1261,7 @@ int amdgpu_atom_execute_table(struct
>> atom_context *ctx, int index, uint32_t * pa
>> {
>> int r;
>> - mutex_lock(&ctx->mutex);
>> + spin_lock(&ctx->lock);
>> /* reset data block */
>> ctx->data_block = 0;
>> /* reset reg block */
>> @@ -1274,7 +1274,7 @@ int amdgpu_atom_execute_table(struct
>> atom_context *ctx, int index, uint32_t * pa
>> ctx->divmul[0] = 0;
>> ctx->divmul[1] = 0;
>> r = amdgpu_atom_execute_table_locked(ctx, index, params);
>> - mutex_unlock(&ctx->mutex);
>> + spin_unlock(&ctx->lock);
>> return r;
>> }
>> diff --git a/drivers/gpu/drm/amd/amdgpu/atom.h
>> b/drivers/gpu/drm/amd/amdgpu/atom.h
>> index a391709..cdfb0d0 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/atom.h
>> +++ b/drivers/gpu/drm/amd/amdgpu/atom.h
>> @@ -26,6 +26,7 @@
>> #define ATOM_H
>> #include <linux/types.h>
>> +#include <linux/spinlock_types.h>
>> #include <drm/drmP.h>
>> #define ATOM_BIOS_MAGIC 0xAA55
>> @@ -125,7 +126,7 @@ struct card_info {
>> struct atom_context {
>> struct card_info *card;
>> - struct mutex mutex;
>> + spinlock_t lock;
>> void *bios;
>> uint32_t cmd_table, data_table;
>> uint16_t *iio;
>
--
Regards,
Shirish S
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^ permalink raw reply [flat|nested] 5+ messages in thread
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2018-05-30 10:19 [PATCH] drm/amdgpu: replace mutex with spin_lock Shirish S
[not found] ` <1527675594-24143-1-git-send-email-shirish.s-5C7GfCeVMHo@public.gmane.org>
2018-05-30 15:21 ` Deucher, Alexander
[not found] ` <BN6PR12MB1809BB86BD60CB77FB5A7BADF76C0-/b2+HYfkarSEx6ez0IUAagdYzm3356FpvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2018-05-31 9:56 ` S, Shirish
2018-05-30 15:40 ` Christian König
[not found] ` <753dc27e-dfd1-ee0c-e592-2883a8110dfe-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2018-05-31 9:59 ` S, Shirish
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