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| author | Ranjith Lohithakshan <ranjithl@ti.com> | 2010-02-17 17:17:01 +0000 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2010-02-17 09:51:41 -0800 |
| commit | b72c7d543589736d43da531566490dd31572f5ca (patch) | |
| tree | 186180445721319b35e5ff8e253f0bb7f124ae12 | |
| parent | 724e6d3fe8003c3f60bf404bf22e4e331327c596 (diff) | |
| download | lwn-b72c7d543589736d43da531566490dd31572f5ca.tar.gz lwn-b72c7d543589736d43da531566490dd31572f5ca.zip | |
omap: Remove DEBUG_FS dependency for mux name checking
The check for a valid mux name should be performed regardless of whether
DEBUG_FS is enabled or not. Otherwise without DEBUG_FS, we get:
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c0004000
[00000000] *pgd=00000000
Internal error: Oops: 5 [#1]
last sysfs file:
Modules linked in:
CPU: 0 Not tainted (2.6.33-rc8 #10)
PC is at strcmp+0x18/0x40
LR is at omap_mux_init_signal+0x68/0x14c
...
This fixes the issue currently seen with boards not booting up
if DEBUG_FS is not enabled in defconfig.
Note that the earlier ifndef + ifdef now becomes simpler ifdef else:
If CONFIG_OMAP_MUX is selected, we use pin names. If it's not selected,
we only want the GPIO to mux register mapping.
Signed-off-by: Ranjith Lohithakshan <ranjithl@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
| -rw-r--r-- | arch/arm/mach-omap2/mux.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c index 5fedc50c58e4..5fef73f4743d 100644 --- a/arch/arm/mach-omap2/mux.c +++ b/arch/arm/mach-omap2/mux.c @@ -961,16 +961,14 @@ static void __init omap_mux_init_list(struct omap_mux *superset) while (superset->reg_offset != OMAP_MUX_TERMINATOR) { struct omap_mux *entry; -#ifndef CONFIG_OMAP_MUX - /* Skip pins that are not muxed as GPIO by bootloader */ - if (!OMAP_MODE_GPIO(omap_mux_read(superset->reg_offset))) { +#ifdef CONFIG_OMAP_MUX + if (!superset->muxnames || !superset->muxnames[0]) { superset++; continue; } -#endif - -#if defined(CONFIG_OMAP_MUX) && defined(CONFIG_DEBUG_FS) - if (!superset->muxnames || !superset->muxnames[0]) { +#else + /* Skip pins that are not muxed as GPIO by bootloader */ + if (!OMAP_MODE_GPIO(omap_mux_read(superset->reg_offset))) { superset++; continue; } |