duff/android_kernel_motorola_sm6225
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disp: msm: fix checking returned value of xx_cmd_transfer

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Change the checking returned value of dsi_ctrl_cmd_transfer(), because
if this is a read command then it will return the number byte of
reading when reading succeed. If this is a write command, then it
will return "none-zero" for failure.

Port from: 01f1152

Change-Id: I961102933e4aad3d2ec99ffaa8cf6d81adac501f
Signed-off-by: Bang Nguyen <bangnguyen@motorola.com>
Reviewed-on: https://gerrit.mot.com/1444415
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Submit-Approved: Jira Key
Reviewed-on: https://gerrit.mot.com/1509816
Reviewed-by: Hua Tan <tanhua1@motorola.com>
This commit is contained in:
Bang Nguyen authored and Gilberto Gambugge committed 2023-06-01 00:43:20 -03:00
1 parent b0652e4563
commit df88a52787
1 file changed
+3 -2
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msm/dsi/dsi_display.c
+3 -2
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@@ -3219,10 +3219,11 @@ static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
cmd_flags |= DSI_CTRL_CMD_ASYNC_WAIT;
if (msg->rx_buf)
flags |= DSI_CTRL_CMD_READ;
cmd_flags |= DSI_CTRL_CMD_READ;
rc = dsi_ctrl_cmd_transfer(display->ctrl[ctrl_idx].ctrl, msg,
&cmd_flags);
if (rc) {
if (((cmd_flags & DSI_CTRL_CMD_READ) && rc <= 0) ||
(!(cmd_flags & DSI_CTRL_CMD_READ) && rc)) {
DSI_ERR("[%s] cmd transfer failed, rc=%d\n",
display->name, rc);
goto error_disable_cmd_engine;