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qti_sdio_client: Drop read write request during removal

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Update read write API to drop further messages during transport or
interface removal.

Change-Id: Ied43de8aa7cef1c36c9c520976357ba1e63017db
Signed-off-by: Amandeep Singh <amansing@codeaurora.org>
This commit is contained in:
Amandeep Singh 2019-07-24 11:36:25 +05:30
parent 31c7686157
commit ae6070aa42
1 changed files with 23 additions and 8 deletions
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31
drivers/char/qti_sdio_client.c
View file

@ -80,7 +80,7 @@
static bool to_console;
module_param(to_console, bool, S_IRUGO | S_IWUSR | S_IWGRP);
static bool ipc_log = 1;
static bool ipc_log;
module_param(ipc_log, bool, S_IRUGO | S_IWUSR | S_IWGRP);
@ -143,7 +143,7 @@ struct qti_sdio_bridge {
unsigned int mdata_count;
unsigned int tx_ready_count;
unsigned int data_avail_count;
atomic_t is_client_closing;
};
struct data_avail_node {
@ -282,7 +282,7 @@ void qti_client_data_avail_cb(struct sdio_al_channel_handle *ch_handle,
ret = sdio_al_queue_transfer(qsb->channel_handle,
SDIO_AL_RX, rx_dma_buf, padded_len, 0);
if (ret == 1) {
pr_err("TRACK: operating in async mode now\n");
pr_debug("operating in async mode now\n");
goto out;
}
if (ret) {
@ -413,9 +413,10 @@ int qti_client_read(int id, char *buf, size_t count)
int bytes = 0;
struct qti_sdio_bridge *qsb = NULL;
if ((id < QCN_SDIO_CLI_ID_TTY) || (id > QCN_SDIO_CLI_ID_DIAG)) {
if ((id < QCN_SDIO_CLI_ID_TTY) || (id > QCN_SDIO_CLI_ID_DIAG) ||
atomic_read(&qsbdev[id]->is_client_closing)) {
pr_err("%s invalid client ID %d\n", __func__, id);
return ret;
return -ENODEV;
}
qsb = qsbdev[id];
@ -428,7 +429,10 @@ int qti_client_read(int id, char *buf, size_t count)
goto out;
}
wait_event(qsb->wait_q, qsb->data_avail);
wait_event(qsb->wait_q, qsb->data_avail ||
atomic_read(&qsb->is_client_closing));
if (atomic_read(&qsb->is_client_closing))
return count;
bytes = qsb->data_avail;
@ -496,6 +500,9 @@ int qti_client_write(int id, char *buf, size_t count)
struct qti_sdio_bridge *qsb = NULL;
DECLARE_COMPLETION_ONSTACK(tx_complete);
if (atomic_read(&qsbdev[id]->is_client_closing))
return -ENODEV;
switch (id) {
case QCN_SDIO_CLI_ID_TTY:
event = TTY_TX_BUF_SZ_EVENT;
@ -572,7 +579,10 @@ int qti_client_write(int id, char *buf, size_t count)
qlog(qsb, "MDATA: %x\n", mdata);
qsb->mdata_count++;
wait_event(qsb->wait_q, qsb->tx_ready);
wait_event(qsb->wait_q, qsb->tx_ready ||
atomic_read(&qsb->is_client_closing));
if (atomic_read(&qsb->is_client_closing))
return count;
if (qsb->mode) {
reinit_completion(&tx_complete);
@ -865,6 +875,7 @@ static int qti_client_probe(struct sdio_al_client_handle *client_handle)
qsb->priv_dev_info = diag_pdev;
}
atomic_set(&qsb->is_client_closing, 0);
qlog(qsb, "probed client %s\n", qsb->name);
return 0;
@ -905,8 +916,12 @@ static int qti_client_remove(struct sdio_al_client_handle *client_handle)
}
qsb = qsbdev[client_handle->id];
atomic_set(&qsb->is_client_closing, 1);
wake_up(&qsb->wait_q);
tty_dev = (struct tty_device *)qsb->priv_dev_info;
if (tty_dev->qsb_device && client_handle->id == QCN_SDIO_CLI_ID_TTY) {
if (client_handle->id == QCN_SDIO_CLI_ID_TTY && tty_dev->qsb_device) {
minor_no = MINOR(tty_dev->qsb_device->devt);
major_no = MAJOR(tty_dev->qsb_device->devt);
device_destroy(tty_dev->qsb_class, MKDEV(major_no, minor_no));