evie/android_kernel_oneplus_msm8998
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Merge "msm: camera: Avoid deadlock for vb2 operations using separate lock"

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Linux Build Service Account 2017-08-10 21:36:34 -07:00 • committed by Gerrit - the friendly Code Review server
commit 1f01c0ba90
2 changed files with 17 additions and 7 deletions
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21
drivers/media/platform/msm/camera_v2/fd/msm_fd_dev.c
View file

@ -434,6 +434,7 @@ static int msm_fd_open(struct file *file)
ctx->vb2_q.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
ctx->vb2_q.io_modes = VB2_USERPTR;
ctx->vb2_q.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
mutex_init(&ctx->lock);
ret = vb2_queue_init(&ctx->vb2_q);
if (ret < 0) {
dev_err(device->dev, "Error queue init\n");
@ -484,7 +485,9 @@ static int msm_fd_release(struct file *file)
msm_cpp_vbif_register_error_handler((void *)ctx,
VBIF_CLIENT_FD, NULL);
mutex_lock(&ctx->lock);
vb2_queue_release(&ctx->vb2_q);
mutex_unlock(&ctx->lock);
vfree(ctx->stats);
@ -514,7 +517,9 @@ static unsigned int msm_fd_poll(struct file *file,
struct fd_ctx *ctx = msm_fd_ctx_from_fh(file->private_data);
unsigned int ret;
mutex_lock(&ctx->lock);
ret = vb2_poll(&ctx->vb2_q, file, wait);
mutex_unlock(&ctx->lock);
if (atomic_read(&ctx->subscribed_for_event)) {
poll_wait(file, &ctx->fh.wait, wait);
@ -752,9 +757,9 @@ static int msm_fd_reqbufs(struct file *file,
int ret;
struct fd_ctx *ctx = msm_fd_ctx_from_fh(fh);
mutex_lock(&ctx->fd_device->recovery_lock);
mutex_lock(&ctx->lock);
ret = vb2_reqbufs(&ctx->vb2_q, req);
mutex_unlock(&ctx->fd_device->recovery_lock);
mutex_unlock(&ctx->lock);
return ret;
}
@ -770,9 +775,9 @@ static int msm_fd_qbuf(struct file *file, void *fh,
int ret;
struct fd_ctx *ctx = msm_fd_ctx_from_fh(fh);
mutex_lock(&ctx->fd_device->recovery_lock);
mutex_lock(&ctx->lock);
ret = vb2_qbuf(&ctx->vb2_q, pb);
mutex_unlock(&ctx->fd_device->recovery_lock);
mutex_unlock(&ctx->lock);
return ret;
}
@ -789,9 +794,9 @@ static int msm_fd_dqbuf(struct file *file,
int ret;
struct fd_ctx *ctx = msm_fd_ctx_from_fh(fh);
mutex_lock(&ctx->fd_device->recovery_lock);
mutex_lock(&ctx->lock);
ret = vb2_dqbuf(&ctx->vb2_q, pb, file->f_flags & O_NONBLOCK);
mutex_unlock(&ctx->fd_device->recovery_lock);
mutex_unlock(&ctx->lock);
return ret;
}
@ -807,7 +812,9 @@ static int msm_fd_streamon(struct file *file,
struct fd_ctx *ctx = msm_fd_ctx_from_fh(fh);
int ret;
mutex_lock(&ctx->lock);
ret = vb2_streamon(&ctx->vb2_q, buf_type);
mutex_unlock(&ctx->lock);
if (ret < 0)
dev_err(ctx->fd_device->dev, "Stream on fails\n");
@ -826,7 +833,9 @@ static int msm_fd_streamoff(struct file *file,
struct fd_ctx *ctx = msm_fd_ctx_from_fh(fh);
int ret;
mutex_lock(&ctx->lock);
ret = vb2_streamoff(&ctx->vb2_q, buf_type);
mutex_unlock(&ctx->lock);
if (ret < 0)
dev_err(ctx->fd_device->dev, "Stream off fails\n");

3
drivers/media/platform/msm/camera_v2/fd/msm_fd_dev.h
View file

@ -1,4 +1,4 @@
/* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.
/* Copyright (c) 2014-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -174,6 +174,7 @@ struct fd_ctx {
struct msm_fd_mem_pool mem_pool;
struct msm_fd_stats *stats;
struct msm_fd_buf_handle work_buf;
struct mutex lock;
};
/*