diff options
Diffstat (limited to 'drivers/misc/cxl/context.c')
| -rw-r--r-- | drivers/misc/cxl/context.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/misc/cxl/context.c b/drivers/misc/cxl/context.c index 2faa1270d..262b88eac 100644 --- a/drivers/misc/cxl/context.c +++ b/drivers/misc/cxl/context.c @@ -42,7 +42,7 @@ int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master, spin_lock_init(&ctx->sste_lock); ctx->afu = afu; ctx->master = master; - ctx->pid = NULL; /* Set in start work ioctl */ + ctx->pid = ctx->glpid = NULL; /* Set in start work ioctl */ mutex_init(&ctx->mapping_lock); ctx->mapping = mapping; @@ -97,6 +97,12 @@ int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master, ctx->pe = i; ctx->elem = &ctx->afu->spa[i]; ctx->pe_inserted = false; + + /* + * take a ref on the afu so that it stays alive at-least till + * this context is reclaimed inside reclaim_ctx. + */ + cxl_afu_get(afu); return 0; } @@ -211,7 +217,11 @@ int __detach_context(struct cxl_context *ctx) WARN_ON(cxl_detach_process(ctx) && cxl_adapter_link_ok(ctx->afu->adapter)); flush_work(&ctx->fault_work); /* Only needed for dedicated process */ + + /* release the reference to the group leader and mm handling pid */ put_pid(ctx->pid); + put_pid(ctx->glpid); + cxl_ctx_put(); return 0; } @@ -278,6 +288,9 @@ static void reclaim_ctx(struct rcu_head *rcu) if (ctx->irq_bitmap) kfree(ctx->irq_bitmap); + /* Drop ref to the afu device taken during cxl_context_init */ + cxl_afu_put(ctx->afu); + kfree(ctx); } |