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serial: cpm_uart: Don't request IRQ too early for console port

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The following message is seen during boot and the activation of
console port gets delayed until normal serial ports activation.

[    0.001346] irq: no irq domain found for pic@930 !

The console port doesn't need irq, perform irq reservation later,
during cpm_uart probe.

While at it, don't use NO_IRQ but 0 which is the value returned
by irq_of_parse_and_map() in case of error. By chance powerpc's
NO_IRQ has value 0 but on some architectures it is -1.

Fixes: 14d893fc68 ("powerpc/8xx: Convert CPM1 interrupt controller to platform_device")
Cc: stable@vger.kernel.org
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/8bed0f30c2e9ef16ae64fb1243a16d54a48eb8da.1664526717.git.christophe.leroy@csgroup.eu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christophe Leroy 2022-09-30 10:33:56 +02:00 • committed by Greg Kroah-Hartman
parent 12f3a5eba3
commit 30963b2f75
1 changed files with 11 additions and 13 deletions
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24
drivers/tty/serial/cpm_uart/cpm_uart_core.c
View file

@ -1203,12 +1203,6 @@ static int cpm_uart_init_port(struct device_node *np,
pinfo->port.fifosize = pinfo->tx_nrfifos * pinfo->tx_fifosize;
spin_lock_init(&pinfo->port.lock);
pinfo->port.irq = irq_of_parse_and_map(np, 0);
if (pinfo->port.irq == NO_IRQ) {
ret = -EINVAL;
goto out_pram;
}
for (i = 0; i < NUM_GPIOS; i++) {
struct gpio_desc *gpiod;
@ -1218,7 +1212,7 @@ static int cpm_uart_init_port(struct device_node *np,
if (IS_ERR(gpiod)) {
ret = PTR_ERR(gpiod);
goto out_irq;
goto out_pram;
}
if (gpiod) {
@ -1244,8 +1238,6 @@ static int cpm_uart_init_port(struct device_node *np,
return cpm_uart_request_port(&pinfo->port);
out_irq:
irq_dispose_mapping(pinfo->port.irq);
out_pram:
cpm_uart_unmap_pram(pinfo, pram);
out_mem:
@ -1425,11 +1417,17 @@ static int cpm_uart_probe(struct platform_device *ofdev)
/* initialize the device pointer for the port */
pinfo->port.dev = &ofdev->dev;
ret = cpm_uart_init_port(ofdev->dev.of_node, pinfo);
if (ret)
return ret;
pinfo->port.irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
if (!pinfo->port.irq)
return -EINVAL;
return uart_add_one_port(&cpm_reg, &pinfo->port);
ret = cpm_uart_init_port(ofdev->dev.of_node, pinfo);
if (!ret)
return uart_add_one_port(&cpm_reg, &pinfo->port);
irq_dispose_mapping(pinfo->port.irq);
return ret;
}
static int cpm_uart_remove(struct platform_device *ofdev)