korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-28 06:34:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

mailbox: imx: enlarge timeout while reading/writing messages to SCFW

Browse Source 
Mailbox driver needs to wait and read all the words in response to a
SCFW API call, else the protocol gets messed up and results in kernel hang.
When the responses are longer than 3 words its possible that SCFW will
take some time to fill up the rest of the words in the MU, a timeout of
100us is arbritrary and too short. While waiting for Linux to consume the
first 3 words of the response SCFW can be busy doing other stuff and hence
Linux needs to wait for the rest of the words.
Similar restriction applies when writing messages that are longer than
3 words.
This patch increases the timeout to 5secs while waiting for response
or writing long messages to SCFW.

Signed-off-by: Ranjani Vaidyanathan <ranjani.vaidyanathan@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
This commit is contained in:
Ranjani Vaidyanathan 2022-02-07 09:52:08 +08:00 committed by Jassi Brar
parent 8219efd08a
commit 81a9d3b930
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/mailbox/imx-mailbox.c
View File

@ -218,7 +218,7 @@ static int imx_mu_specific_tx(struct imx_mu_priv *priv, struct imx_mu_con_priv *
ret = readl_poll_timeout(priv->base + priv->dcfg->xSR[IMX_MU_TSR],
xsr,
xsr & IMX_MU_xSR_TEn(priv->dcfg->type, i % num_tr),
0, 100);
0, 5 * USEC_PER_SEC);
if (ret) {
dev_err(priv->dev, "Send data index: %d timeout\n", i);
return ret;
@ -263,7 +263,8 @@ static int imx_mu_specific_rx(struct imx_mu_priv *priv, struct imx_mu_con_priv *
for (i = 1; i < size; i++) {
ret = readl_poll_timeout(priv->base + priv->dcfg->xSR[IMX_MU_RSR], xsr,
xsr & IMX_MU_xSR_RFn(priv->dcfg->type, i % 4), 0, 100);
xsr & IMX_MU_xSR_RFn(priv->dcfg->type, i % 4), 0,
5 * USEC_PER_SEC);
if (ret) {
dev_err(priv->dev, "timeout read idx %d\n", i);
return ret;