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ARM: OMAP1: ams-delta: Fix impossible .irq < 0 

Since the very beginning, unsigned int .irq member of struct
plat_serial8250_port introduced by commit eff443df67 ("OMAP1:
AMS_DELTA: add modem support") was statically initialized to a negative
value -EINVAL.  Moreover, commit 0812db9437 ("ARM: OMAP1: ams-delta:
assign MODEM IRQ from GPIO descriptor") has introduced some new code
which checks for that member carrying a negative value which is
impossible.

Use IRQ_NOTCONNECTED instead of -EINVAL. Also, drop the valueless check
and let the modem device be registered regardless of .irq value, and
the value handled by "serial8250" driver.

Fixes: 0812db9437 ("ARM: OMAP1: ams-delta: assign MODEM IRQ from GPIO descriptor")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Acked-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Janusz Krzysztofik 2018-10-02 11:45:29 +02:00 committed by Tony Lindgren
parent 1137ceee76
commit ab6ead7d07
1 changed files with 2 additions and 6 deletions
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8
arch/arm/mach-omap1/board-ams-delta.c
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@ -765,7 +765,7 @@ static struct plat_serial8250_port ams_delta_modem_ports[] = {
{
.membase = IOMEM(MODEM_VIRT),
.mapbase = MODEM_PHYS,
.irq = -EINVAL, /* changed later */
.irq = IRQ_NOTCONNECTED, /* changed later */
.flags = UPF_BOOT_AUTOCONF,
.irqflags = IRQF_TRIGGER_RISING,
.iotype = UPIO_MEM,
@ -856,8 +856,7 @@ static int __init modem_nreset_init(void)
/*
* This function expects MODEM IRQ number already assigned to the port
* and fails if it's not.
* This function expects MODEM IRQ number already assigned to the port.
* The MODEM device requires its RESET# pin kept high during probe.
* That requirement can be fulfilled in several ways:
* - with a descriptor of already functional modem_nreset regulator
@ -880,9 +879,6 @@ static int __init ams_delta_modem_init(void)
if (!machine_is_ams_delta())
return -ENODEV;
if (ams_delta_modem_ports[0].irq < 0)
return ams_delta_modem_ports[0].irq;
omap_cfg_reg(M14_1510_GPIO2);
/* Initialize the modem_nreset regulator consumer before use */