gpu: nvgpu: handle error return for exec_reg_ops failure.

The error returned from the execution of exec_reg_ops was ignored
leading to not propagating the error values to the caller methods.
This patch handles the error occurence in the exec_reg_ops call.

Bug 2245743

Change-Id: I0d696c116fc1b2fce0e14ac7a05e1d85b5d18129
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1775818
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/ioctl_dbg.c b/drivers/gpu/nvgpu/os/linux/ioctl_dbg.c
index ad4dfc0e..b2c7a362 100644
--- a/drivers/gpu/nvgpu/os/linux/ioctl_dbg.c
+++ b/drivers/gpu/nvgpu/os/linux/ioctl_dbg.c
@@ -938,6 +938,10 @@ static int nvgpu_ioctl_channel_reg_ops(struct dbg_session_gk20a *dbg_s,
                         err = g->ops.dbg_session_ops.exec_reg_ops(
                                 dbg_s, g->dbg_regops_tmp_buf, num_ops);
 
+                        if (err) {
+                                break;
+                        }
+
                         err = nvgpu_get_regops_data_linux(g->dbg_regops_tmp_buf,
                                         linux_fragment, num_ops);